Search Subject Areas | Preprints.org

Preprint REVIEW | doi:10.20944/preprints202402.0551.v1

Higinio Gonzalez-Jorge, Enrique Aldao, Gabriel Fontenla-Carrera, Fernando Veiga-López, Eduardo Balvís, Eduardo Ríos-Otero

Subject: Engineering, Aerospace Engineering Keywords: counter-UAS; drone threat; unmanned aircraft system; malicious drone

Online: 9 February 2024 (10:52:53 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201907.0001.v1

Variable Cant Angle Winglets for Improvement of Aircraft Flight Performance

Joel Guerrero, Kevin Wittkowski, Marco Sanguineti

Subject: Engineering, Aerospace Engineering Keywords: Variable cant angle; Winglets; Drag reduction; Lift-induced drag; CFD

Online: 1 July 2019 (11:02:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202311.1853.v1

Design and Optimization of Combustion Chamber for Gas Turbine Engine

Nandan Kumar Jha, Bhakti Sachin Malve, Rohit Vinod Gawde

Subject: Engineering, Aerospace Engineering Keywords: Aviation; Marine propulsion; Combustion chamber; high power to fuel ratio; Gas turbine engines

Online: 29 November 2023 (11:08:52 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202011.0527.v1

Using Convolutional Neural Networks to Automate Aircraft Maintenance Visual Inspection

Anil Dogru, Soufiane Bouarfa, Ridwan Arizar, Reyhan Aydogan

Subject: Engineering, Aerospace Engineering Keywords: Aircraft Maintenance Inspection; Anomaly Detection; Defect Inspection; Convolutional Neural Networks; Mask R-CNN; Generative Adversarial Networks; Image Augmentation

Online: 20 November 2020 (09:16:13 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202009.0480.v2

Pest Animal's Detection and Habitat Identification in Low-resolution Airborne Thermal Imagery

Anwaar Ulhaq, Asim Khan

Subject: Engineering, Aerospace Engineering Keywords: invasive species; thermal imaging; habitat identification; deep learning

Online: 21 September 2020 (06:01:38 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202307.1813.v1

A Review on Agricultural Wastes and Pineapple Leaf Fibers in UAVs Airframe Manufacturing

Farah Syazwani Shahar, Mohamed Thariq Hameed Sultan, Andrzej Łukaszewicz, Rafał Grzejda

Subject: Engineering, Aerospace Engineering Keywords: UAV; aircraft airframe; agricultural waste; natural fiber composites; waste composites; pineapple; reusing waste; natural waste

Online: 26 July 2023 (13:26:44 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202307.0807.v1

Structural and Shape Optimization in Aerodynamic Airfoil Performance: A Literature Review

Juan Manuel De Egea Juvinel, Diego P. Pinto Roa, Christian Emilio Schaerer

Subject: Engineering, Aerospace Engineering Keywords: airfoil; morphing technology; Shape optimization

Online: 12 July 2023 (09:28:09 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202105.0238.v1

Design and Testing of the TeamIndus ECA Lunar Rover Navigation and Control

Vishesh Vatsal, Venkat Bhargav

Subject: Engineering, Aerospace Engineering Keywords: lunar, rover, navigation, control

Online: 11 May 2021 (11:06:14 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202402.0382.v1

Materials Used in Space Shuttle: Evolution, Challenges, and Future Prospects - An Overview

Irfan Nazir Wani, Kanika Aggarwal, Swati Bishnoi, Pushpendra Shukla, Dineshkumar Harursampath, Ashish Garg

Subject: Engineering, Aerospace Engineering Keywords: Space Shuttle, Materials, Thermal Protection Systems, Structural Materials, Propulsion Systems, Re-entry, Nanotechnology, Composite Materials, Additive Manufacturing, Materials Science, Emerging Materials.

Online: 6 February 2024 (15:09:37 CET)

Show abstract| Download PDF| Share

The space shuttle, a revolutionary spacecraft that has played a significant role in human space exploration, was composed of various advanced materials that were carefully selected to meet the extreme demands of spaceflight. This review paper provides a comprehensive examination of the materials historically employed in the construction of space shuttles and explores the latest trends shaping the field. The evolution of space shuttle materials is traced from the inception of the space program to contemporary missions, highlighting key milestones, challenges, and breakthroughs. Emphasis is placed on the critical role that materials play in the overall performance, safety, and sustainability of space shuttles. The paper begins by elucidating the diverse requirements that materials must fulfill in the harsh and complex environment of space, encompassing extreme temperatures, radiation exposure, and mechanical stresses. A detailed analysis of the materials utilized in the fabrication of various shuttle components, such as thermal protection systems, structural elements, and propulsion systems, is presented. Special attention is given to the challenges posed by re-entry and the strategies employed to mitigate heat-related issues. Furthermore, the review explores recent innovations and emerging materials that are reshaping the landscape of space shuttle design. Advancements in nanotechnology, composite materials, and additive manufacturing are discussed in the context of their potential applications for enhancing shuttle performance and reducing mission costs. The paper also addresses the importance of sustainability in space exploration, exploring materials with lower environmental impact and improved recyclability. The review concludes with a forward-looking perspective on the future of materials, considering ongoing research, development, and the potential incorporation of cutting-edge technologies. Insights are provided into how the evolving landscape of materials science may influence the design and manufacturing processes of the next generation of space vehicles. This paper provides an overview of the materials used in the construction of the space shuttle, including their properties, applications, and challenges. The materials used in the space shuttle are critical in ensuring the safety, performance, and longevity of the spacecraft, and understanding their characteristics and performance in space is crucial for the advancement of aerospace engineering.

Preprint ARTICLE | doi:10.20944/preprints202009.0480.v1

Pest Animal's Detection, and Habitat Identification in Low-resolution Airborne Thermal Imagery

Anwaar Ulhaq

Subject: Engineering, Aerospace Engineering Keywords: invasive species; thermal imaging; habitat identification; deep learning

Online: 20 September 2020 (14:53:47 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202212.0180.v1

Stick-free Flight Stability Problem Revisited: A Modeling and Simulation Approach

Ege Cagri ALTUNKAYA, Ibrahim OZKOL

Subject: Engineering, Aerospace Engineering Keywords: Stick-free flight stability; Flight dynamics; Modeling and simulation; Aircraft design; Aircraft design optimization

Online: 9 December 2022 (10:26:34 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202308.1403.v1

From Nature to the Skies: Exploring Bio-Inspired Polymer Coatings for Aerospace Advancements

Thinesh Sharma Balakrishnan, Mohamed Thariq Hameed Sultan, Farah Syazwani Shahar, Andrzej Łukaszewicz, Jerzy Józwik, Ain Umaira Md Shah, Rafał Grzejda

Subject: Engineering, Aerospace Engineering Keywords: aerospace coatings; bio-inspired coatings; polymer coatings; surface engineering

Online: 21 August 2023 (09:47:41 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202310.0921.v1

Recent Advances in Space Debris Removal Techniques; A study

Ayan Deghuria, Richeek Debnath, Varsha G, Khushi Raheja

Subject: Engineering, Aerospace Engineering Keywords: Space Debris

Online: 16 October 2023 (09:03:23 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202308.1367.v1

Power Sources for Unmanned Aerial Vehicles: State - of - the Art Review

Yavinaash Naidu Saravanakumar, Mohamed Thariq Hameed Sultan, Farah Syazwani Shahar, Wojciech Giernacki, Andrzej Łukaszewicz, Marek Nowakowski, Andriy Holovatyy, Sławomir Stępień

Subject: Engineering, Aerospace Engineering Keywords: UAV; power supply; battery swapping; laser beam inflight charging; tethered UAV; batteries; battery systems; materials of batteries

Online: 18 August 2023 (10:26:04 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.0418.v1

Propeller Aerodynamic Design and Optimization

saheed adebimpe

Subject: Engineering, Aerospace Engineering Keywords: propeller design; aerodynamics; propulsion; performance; airflow dynamics; thrust; lift; torque; airfoil; geometry; blade element theory; optimization; operational conditions

Online: 8 October 2023 (07:25:23 CEST)

Show abstract| Download PDF| Share

This research endeavors to illuminate the path toward efficient and optimized propeller design by delving into the realm of aerodynamics. Propellers, as vital mechanical marvels, constitute the core of numerous propulsion systems, spanning from aircraft and marine vessels to wind turbines. The pursuit of enhanced propeller efficiency and performance holds paramount importance in industries where propulsion assumes a critical role, underscoring the indispensable need for a profound understanding of aerodynamics. Through meticulously crafted theoretical insights and their practical applications, this study embarks on a journey into the fascinating realm of propeller aerodynamics. While the paper primarily addresses the aerodynamic aspects of propeller design and optimization, it serves as a foundational guide for those seeking to comprehend the intricacies of propeller engineering.The research journey commences with an in-depth exploration of the fundamental principles governing propeller performance. It unveils the intricate dynamics of airflow surrounding propeller blades, shedding light on their proficiency in generating thrust, lift, and torque. The bedrock of the theoretical insights is a comprehensive analysis encompassing airfoil profiles, blade geometry, and the underlying principles of blade element theory. In navigating the ensuing pages, the study embarks on the task of demystifying the intricate methods and calculations that propel the design and optimization of propellers. Leveraging cutting-edge methodologies, the research systematically assesses the aerodynamic characteristics of propellers across various operational conditions. These invaluable insights empower the tailoring of propeller designs with precision, aligning them seamlessly with specific performance objectives. The aim is not only to impart a comprehensive understanding of propeller aerodynamics but also to provide actionable insights for engineers and researchers striving to enhance propeller efficiency. This research endeavor serves as a guiding light for both propeller enthusiasts and professionals alike. It not only enriches the broader discourse on propeller technology but also equips readers with the requisite knowledge and tools to embark on their own quests for optimized propeller design. As propulsion technologies continue their evolution, the steadfast principles elucidated herein will persist, guiding future innovations and advancements in the realm of propeller engineering. This paper serves as a profound resource, offering new researchers a comprehensive understanding of propellers and their intricate design processes.

Preprint ARTICLE | doi:10.20944/preprints202306.1585.v1

Comparison of Aeroelastic Problems Calculation Methods Based on Numerical and Experimental Results

Aniello Daniele Marano, Michele Guida, Tiziano Polito, Francesco Marulo

Subject: Engineering, Aerospace Engineering Keywords: Aeroelasticity; Flutter; Divergence; NASTRAN; ZAERO; GVT

Online: 25 June 2023 (04:35:14 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202109.0168.v1

The Use of Drones in the Spatial Social Sciences

Ola Hall, Ibrahim Wahab

Subject: Engineering, Aerospace Engineering Keywords: Drones; legislation; ethics; spatial social sciences

Online: 9 September 2021 (10:33:31 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.2188.v1

Predicting the Effect of Surface Waviness on Fatigue Life of a Wire + Arc Additive Manufactured Ti-6Al-4V Alloy

Muhammad Shamir, Xiang Zhang, Abdul Khadar Syed, Wayne Sadler

Subject: Engineering, Aerospace Engineering Keywords: WAAM; surface waviness; fatigue; bending test; durability; fracture mechanics

Online: 31 May 2023 (07:47:02 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202311.0344.v1

Turbomachinery Noise Review

Stéphane Moreau, Michel Roger

Subject: Engineering, Aerospace Engineering Keywords: aeroacoustics; turbomachinery noise; analytical modeling; computational aeroacoustics

Online: 6 November 2023 (10:32:44 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202209.0193.v1

Surface Engineering of Nanomaterials: Processing and Applications

Mainak Saha

Subject: Engineering, Aerospace Engineering Keywords: nanomaterials; chemical vapour deposition; atomic layer deposition; pseudocapacitors; batteries

Online: 14 September 2022 (05:46:19 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202304.1251.v1

Improved Curve–Flattening for Flexible Space Robotics

Wenxin Li, Timothy Sands

Subject: Engineering, Aerospace Engineering Keywords: robotics; flexible; control; structural filter; space robotics

Online: 30 April 2023 (03:39:25 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1325.v1

Agile Methodology for the Standardization of Engineering Requirements using Large Language Models

Archana Tikayat Ray, Bjorn F Cole, Olivia J Pinon Fischer, Anirudh Prabhakara Bhat, Ryan T White, Dimitri N Mavris

Subject: Engineering, Aerospace Engineering Keywords: Requirements Engineering; Natural Language Processing; NLP; BERT; Requirements boilerplates; Model-Based Systems Engineering; MBSE; Requirements table; Large Language Models (LLMs); Transformer based language models

Online: 18 May 2023 (10:19:18 CEST)

Show abstract| Download PDF| Share

The increased complexity of modern systems is calling for an integrated and comprehensive approach to system design and development and in particular, a shift towards Model-Based Systems Engineering (MBSE) approaches for system design. The requirements that serve as the foundation for these intricate systems are still primarily expressed in Natural Language (NL), which can contain ambiguities and inconsistencies that hinder their direct translation into models. The colossal developments in the field of Natural Language Processing (NLP) in general and Large Language Models (LLMs) in particular can serve as an enabler for the conversion of NL requirements into semi-machine-readable requirements. This is expected to facilitate their standardization and use in a model-based environment. This paper discusses a two-fold strategy for converting NL requirements into semi-machine-readable requirements using language models. The first approach involves creating a requirements table by extracting information from free-form NL requirements. The second approach is an agile methodology that facilitates the identification of boilerplate templates for different types of requirements based on observed linguistic patterns. For this study, three different LLMs were utilized. Two of these models were fine-tuned versions of Bidirectional Encoder Representations from Transformers (BERT), specifically aeroBERT-NER and aeroBERT-Classifier, which were trained on annotated aerospace corpora. Another LLM, called flair/chunk-english, was utilized to identify sentence chunks present in NL requirements. All three language models were utilized together to achieve the standardization of requirements. To demonstrate the effectiveness of the methodologies, requirements from Parts 23 and 25 of Title 14 Code of Federal Regulations (CFRs) were employed, and a total of two, five, and three boilerplate templates were identified for design, functional, and performance requirements, respectively.

Preprint ARTICLE | doi:10.20944/preprints202106.0148.v1

Radical Reduction of Aircraft Fuel Consumption by Optimizing Aerofoil by New Evolutionary Algorithms

Jan Müller

Subject: Engineering, Aerospace Engineering Keywords: Evolutionary algorithms; shape of aerofoil; optimization of shape; Bezier-PARSEC model

Online: 7 June 2021 (07:54:50 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202308.1052.v1

Metal Additive Manufacturing for Industry 4.0 Aerospace: Review and Research Agenda

Ageel Abdulaziz Alogla

Subject: Engineering, Aerospace Engineering Keywords: Prototyping; Spare Parts; Metal Additive Manufacturing; Demand Variability; Stockout

Online: 14 August 2023 (13:36:47 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202308.1853.v1

Investigating Overlap Ratio Effect on Performance of a Modified Savonius Wind Turbine: An Experimental Study

Omid Karimi, Masoud Kharati Koopaee, Ali reza Tavakolpour-Saleh, Seyed Ehsan Hosseini

Subject: Engineering, Aerospace Engineering Keywords: Savonius wind turbine; rotational speed; overlap ratio; power coefficients; torque coefficients; tip speed ratio

Online: 29 August 2023 (03:52:15 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.2194.v1

Research on the Distributed Propeller Slipstream Effect of UAV Wing Based on the Actuator Disk Method

Mingzhi Cao, Kun Liu, Chunqiang Wang, Jingbo Wei, Zijie Qin

Subject: Engineering, Aerospace Engineering Keywords: Distributed electric propulsion; Wing–propeller interaction; Actuator disk method; Genetic algorithm optimization

Online: 31 May 2023 (08:12:04 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.1073.v1

Digital Twin Development for the Airspace of the Future

Toufik Souanef, Saba Al-Rubaye, Antonios Tsourdos, Samuel Ayo, Dimitrios Panagiotakoupoulos

Subject: Engineering, Aerospace Engineering Keywords: Digital Twin; Unmanned Traffic management; Unmanned Aerial Systems

Online: 15 June 2023 (10:25:41 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.1234.v1

Enhancing Real-Time Control of Brushless DC Motors for More Electric Aircraft

Khairy Sayed, Mahmoud Aref, Heba El-Zohri, Adel Ahmed

Subject: Engineering, Aerospace Engineering Keywords: brushless direct current motors; current control; pulse width modulation; speed control of BLDC motors; more electric aircraft

Online: 19 October 2023 (09:49:33 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1787.v1

Dynamic Analysis and Numerical Simulation of Arresting Hook Engaging Cable in Carried-based Aircraft Landing

Haoyuan Shao, Zi Kan, Yifeng Wang, Daochun Li, Zhuoer Yao, Jinwu Xiang

Subject: Engineering, Aerospace Engineering Keywords: Carrier-based aircraft; engagement; FEM-MBD; rigid-flexible coupling model; dynamic analysis

Online: 25 May 2023 (09:49:02 CEST)

Show abstract| Download PDF| Share

The engagement of the arresting hook with the arresting cable is a critical maneuver that is essential to the safe operation of aircraft landing on aircraft carrier. A comprehensive understanding of the engagement process dynamics is necessary to optimize landing performance and ensure the safety and efficiency of carrier operations. In this paper, an efficient and accurate simulation and analysis method is presented for studying the arresting hook engaging arresting cable process. The Finite Element Method and Multibody Dynamics (FEM-MBD) approach is employed. By establishing a rigid-flexible coupling model encompassing the aircraft frame, arresting hook, carrier deck and arresting gear system, the dynamic model for the engagement process is obtained. The model incorporates multiple coordinate systems to effectively capture the relative motion between the rigid and flexible components, enabling a thorough understanding of the dynamics characteristics. The analysis conducted in this paper takes into account various factors, including the material properties of the components, the characteristics of the arresting gear system, and the state of the aircraft during the engagement process. The analysis method is verified by comparing the simulation results with experiments of arresting hook rebound obtained from reference. Finally, simulations are performed to analyze the engagement process under different touchdown points and rolling angle of aircraft. The simulation results provide valuable insights into the distribution of stresses during the arresting hook and cable engagement, the center of gravity variations, as well as the response of the tire touch and rollover cable under specific scenarios. The proposed rigid-flexible coupling arresting dynamics model in this paper enables effective analysis of the dynamic behavior during arresting hook engaging arresting cable. The results obtained from this analysis offer valuable insights into the performance of the engagement process, which can be used to improve the design of carrier-based aircraft and techniques for carrier landing.

Preprint ARTICLE | doi:10.20944/preprints202305.1795.v1

Linear and Nonlinear Models for Drop Simulation of Aircraft Landing Gear System with MR Dampers

Byung-Hyuk Kang, Bang-Hyun Jo, Bo-Gyu Kim, Jai-Hyuk Hwang, Seung-Bok Choi

Subject: Engineering, Aerospace Engineering Keywords: magnetorheological (MR) fluid; MR landing gear; drop test performance; aircraft dynamic model

Online: 25 May 2023 (10:25:16 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202402.1154.v1

3D Printing Modules for Self-Assembling Space Systems

Alex Ellery, Abdurr Elaskri

Subject: Engineering, Aerospace Engineering Keywords: additive manufacturing; 3D printed electric motors; self-assembly; reconfigurable robotics; flat-pack space structures; space debris resources

Online: 20 February 2024 (14:25:26 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202308.1937.v1

Experimental Investigation and Multi-objective Optimization of Savonius Wind Turbine Based on modified Non-dominated Sorting Genetic Algorithm-II

Seyed Ehsan Hosseini, Omid Karimi, Mohammad Ali AsemanBakhsh

Subject: Engineering, Aerospace Engineering Keywords: Savonius wind turbine; modified NSGA-II; Artificial neural network; Multi-objective optimization

Online: 29 August 2023 (09:30:55 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202312.1547.v1

Physics-Based Aircraft Dynamics Identification Using Genetic Algorithms

Raymundo Peña-García, Rodolfo Daniel Velázquez-Sánchez, Cristian Gómez-Daza-Argumedo, Jonathan Omega Escobedo-Alva, Ricardo Tapia-Herrera, Jesús Alberto Meda-Campaña

Subject: Engineering, Aerospace Engineering Keywords: Physical-based modelling; system identification; transition matrix; genetic algorithm.

Online: 20 December 2023 (13:49:48 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202304.0022.v1

Deep Learning Neural Network Performance on NDT Digital X-ray Radiography Images: Analyzing the Impact of Image Quality Parameters - An Experimental Study

Bata Hena, Ziang Wei, Clemente Ibarra Castanedo, Xavier Maldague

Subject: Engineering, Aerospace Engineering Keywords: non-destructive testing; deep learning; automated defect recognition (ADR); semantic segmentation; digital X-ray radiography

Online: 3 April 2023 (10:25:31 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1349.v1

Study on the Movement Characteristics of Fuel in the Fuel Tank during Maneuvering Process

Yameng Wang, Chenran Ruan, Song Lu, Zhenghong Li

Subject: Engineering, Aerospace Engineering Keywords: Aircraft fuel system; Maneuvering; Free surface; Wing fuel tank; Finite point set method

Online: 18 May 2023 (14:17:34 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1208.v1

Variable Stroke Fatigue Test Technology for Aircraft Landing Gears

Botao Hu, Chao Chen, Xiangming Chen, Chun Zhang, Yanan Chai

Subject: Engineering, Aerospace Engineering Keywords: landing gear; variable stroke; test; displacement control; follow-up

Online: 17 May 2023 (08:21:52 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202304.0290.v1

Development and Evaluation of an Enhanced Virtual-Reality Flight Simulation Tool for Airships

Mohsen Rostami, Jafer Kamoonpuri, Pratik Pradhan, Joon Chung

Subject: Engineering, Aerospace Engineering Keywords: Virtual Reality; Flight Simulation; Ground Control Station; Airship; Flight Test; Training

Online: 13 April 2023 (03:31:00 CEST)

Show abstract| Download PDF| Share

A real-time flight simulation tool is proposed using a Virtual Reality Head-Mounted Display (VR-HMD) for airships operating in beyond the line-of-sight (BLOS) conditions. Particularly, the VR-HMD is developed for stratospheric airships flying at low/high altitudes. The proposed flight simulation tool uses the corresponding aerodynamics characteristics of the airship, the buoyancy effect, mass balance, added mass, propulsion contributions and ground reactions in the FlightGear Fight Simulator (FGFS). The VR headset has been connected to the FGFS along with the radio controller containing the real-time orientation/state of each button that is also simulated to provide better situational awareness and a Head-Up Display (HUD) that has been developed to provide the required flight data. In this work, a system was developed to connect the FGFS and the VR-capable graphics engine, Unity, to a PC and a wireless VR-HMD in real-time with minimal lag between data transmission. A balance was found for FGFS to write to a CSV file at a period of 0.01s. For Unity, the file was read every frame which translates to around 0.0167s (60 Hz). A test procedure was also conducted with a similar rating technique based on the NASA TLX questionnaire that identifies the pilot’s spare mental capacity when completing an assigned task to assure the comfortability of the proposed VR-HMD. Accordingly, a comparison has been made for the aircraft control using the desktop simulator and the VR-HMD tool. Results, showed that the current iteration of the system is ideal to train pilots on using similar systems in a safe and immersive environment. Furthermore, such an advanced portable system may even increase the situational awareness of pilots and allow them to complete a sizeable portion of actual flight tests with the same data transmission procedures in simulation. The resulting VR-HMD flight simulator is also conceived to express the ground control station (GCS) concept and transmit flight information as well as the point of view (POV) visuals in real-time using the real environment broadcasted using an onboard camera.

Preprint ARTICLE | doi:10.20944/preprints202304.0097.v1

Fiber Bragg Grating Sensor Networks enhances the in-situ real time monitoring capabilities of MLI Thermal Blankets for Space Applications

Carlo Giovanni Ferro, Alessandro Aimasso, Matteo Davide Lorenzo Dalla Vedova, Paolo Maggiore, Matteo Bertone

Subject: Engineering, Aerospace Engineering Keywords: Aerospace, Fiber Bragg Gratings, Thermal Measurements, Thermal Control, MLI, Onboard System, Optical Fibers, Sensors Network, Smart Systems.

Online: 6 April 2023 (12:40:41 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202309.1994.v1

Integrating GRU with Kalman Filter to Enhance Visual Inertial Odometry Performance in Complex Environments

Tarafder Elmi Tabassum, Zhengjia Xu, Ivan Petrunin, Zeeshan Rana

Subject: Engineering, Aerospace Engineering Keywords: GNSS; visual inertial odometry; failure modes; GRU-aided ESKF; complex environments

Online: 28 September 2023 (10:28:57 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202312.1876.v1

Numerical Simulation of Flow around a Pitching Airfoil with Combined Morphing Leading Edge and Trailing Edge Wing

Musavir Bashir, Mir Hossein Negahban, Ruxandra Mihaela Botez, Tony Wong

Subject: Engineering, Aerospace Engineering Keywords: Morphing; Unsteady Parameterization; Combined Morphing Leading Edge and Trailing Edge (CoMpLETE); Flow Control

Online: 25 December 2023 (12:58:25 CET)

Show abstract| Download PDF| Share

An integrated approach to active flow control is proposed by finding both the drooping leading edge and the morphing trailing edge for flow management. This strategy aims to manage flow separation control by utilizing the synergistic effects of both control mechanisms, which we call the Combined Morphing Leading Edge and Trailing Edge (CoMpLETE) technique. This design is inspired by a bionic porpoise nose and the flap movements of the cetacean species. The motion of this mechanism achieves a continuous, wave-like, variable airfoil camber. The dynamic motion of the airfoil's upper and lower surface coordinates in response to unsteady conditions is achieved by combining the thickness-to-chord (t/c) distribution with the time-dependent camber line equation. A parameterization model was constructed to mimic the motion around the morphing airfoil at various deflection amplitudes at stall angle of attack and morphing actuation start times. The mean properties and qualitative trends of the flow phenomena are captured by the transition-SST (Shear Stress Transport) model. The effectiveness of the dynamically morphing airfoil as a flow control approach is evaluated by obtaining the flow field data, such as velocity streamlines, vorticity contours, and aerodynamic forces. Different cases are investigated for the CoMpLETE morphing airfoil, which evaluates the airfoil’s parameters, such as its morphing location, deflection amplitude, and morphing starting time. The morphing airfoil’s performance is analyzed to provide further insights into the dynamic lift and drag force variations at pre-defined deflection frequencies of 0.5 Hz, 1 Hz, and 2 Hz. The findings demonstrate that adjusting the airfoil camber reduces streamwise adverse pressure gradients, thus preventing significant flow separation. Although the trailing edge deflection and its location along the chord influence the generation and separation of the Leading-Edge Vortex (LEV), these results show that the combined effect of the morphing leading edge and trailing edge has the potential to mitigate flow separation. The morphing airfoil successfully contributes to the flow reattachment and significantly increases the maximum lift coefficient (c_(l,max))). This work also broadens its focus to investigate the aerodynamic effects of a dynamically morphing leading and trailing edge, which seamlessly transitions along the side edges. The aerodynamic performance analysis is investigated across varying morphing frequencies, amplitudes, and actuation times.

Preprint ARTICLE | doi:10.20944/preprints202305.1202.v1

Integrated Design System of Aircrafts Based on Generative Modeling Method

Wojciech Skarka, Rafał Nalepa, Robert Musik

Subject: Engineering, Aerospace Engineering Keywords: Generative model; Knowledge-Based Engineering; Design automation; Conceptual design; Aerospace Engineering; Computer Aided Design

Online: 17 May 2023 (07:14:32 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202304.0252.v2

Neural Network Technology for Cryptographic Protection of Data Transmission at UAV

Ivan Tsmots, Vasyl Teslyuk, Andrzej Łukaszewicz, Yurii Lukashchuk, Iryna Kazymyra, Andriy Holovatyy, Yurii Opotyak

Subject: Engineering, Aerospace Engineering Keywords: neural network technology; cryptographic protection; UAV; UAS, onboard system; encryption; decryption; tabular-algorithmic method; scalar product; real time

Online: 14 April 2023 (07:13:14 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.2101.v2

Breaking Barriers: Initial Step Towards Certification Standards for Aircraft Wing-Structure-Integrated High-Pressure Composite Hydrogen Tanks

Javed Arshad Butt, Johannes Friedrich Carl Markmiller

Subject: Engineering, Aerospace Engineering Keywords: structure-integrated tanks; high pressure composite hydrogen tanks; hydrogen standards in aviation; standard for strucutre-integrated hydrogen tanks; SWITH

Online: 4 July 2023 (03:15:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202309.0103.v1

Parametric Optimisation of Hypersonic Re-entry Capsules with Air-Duct Systems

Mansour Al Qubeissi, Feras Shaban, Khalid M. Almohammadi, Raja Mazuir R.A. Shah

Subject: Engineering, Aerospace Engineering Keywords: Design; Fluid dynamics; Hypersonic flow; Modelling; Optimisation; Re-entry capsule

Online: 5 September 2023 (10:24:54 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.1509.v1

Noise Reduction in Helicopter Cabins Using Microperforated Panel Composite Sound Absorption Structures

Chenglei Li, Yang Lu, Chunbo Lan, Yang Wang

Subject: Engineering, Aerospace Engineering Keywords: helicopter; cabin noise reduction; microperforated panel; composite acoustic structure; sound field analysis; acoustic metamaterials

Online: 21 June 2023 (08:51:08 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202307.0981.v1

Hybrid Turbo-shaft Engine Digital Twining for Autonomous Air-crafts via AI and Synthetic Data Generation

Ali AGHAZADEH ARDEBILI, Antonio FICARELLA, Antonella Longo, Adem KHALIL, Sabri KHALIL

Subject: Engineering, Aerospace Engineering Keywords: Autonomous Aircraft; Urban Air Mobility; Digital Twins; Unmanned Aircraft Systems; Unmanned Aircraft Vehicles; Synthetic data Generation; Data for Resilience; Transport Complex Systems; Smart Cities; Digitalization

Online: 14 July 2023 (11:10:15 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202304.1048.v1

Optimization of Airplane Landing in Crosswind Conditions for Minimum Tire Wear

Stefano Cacciola, Carlo E.D. Riboldi, Edoardo Generali

Subject: Engineering, Aerospace Engineering Keywords: Landing; Flight simulation; Tire wear; Optimization; Crosswind; Nonlinear flight dynamics; Trim; Ground-contact detection

Online: 27 April 2023 (05:19:37 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202307.1495.v1

Influence of Placing Positions of PZT Transducers in Thick Composites on Ultrasonic Guided Waves

Tianyi Feng, MH Ferri Aliabadi

Subject: Engineering, Aerospace Engineering Keywords: Structural Health Monitoring (SHM); lead zirconate titanate (PZT) transducers; embedded positions; thick composites; finite element modelling (FEM)

Online: 21 July 2023 (11:32:47 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1485.v1

Exploring the Performance Boundaries of a Reconfigurable Multi-Mission Military UAV through Multidisciplinary Analysis

Dioser Santos, Jeremy Rogers, Armando De Rezende, Victor Maldonado

Subject: Engineering, Aerospace Engineering Keywords: Unmanned Aerial Vehicle; Reconfigurable; Multi-mission; Computational Fluid Dynam- 16 ics; Additive Manufacturing; Finite Element Analysis

Online: 22 May 2023 (09:35:00 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.0310.v1

Study of the Feasibility of Decoupling Temperature and Strainfrom a ϕ-PA-OFDR over an SMF Using Neural Networks

Andrés Pedraza, Daniel Del Río, Víctor Bautista-Juzgado, Antonio Fernández-López, Ángel Sanz-Andrés

Subject: Engineering, Aerospace Engineering Keywords: decoupling; distributed sensing; XAI; Machine Learning; ϕ-PA-OFDR

Online: 5 May 2023 (06:06:59 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.0350.v1

Large-Eddy Simulations of a Hypersonic Re-entry Capsule Coupled With the Supersonic Disk-Gap-Band Parachute

Lakshmi Narayana Phaneendra Peri, Ingenito Antonella, Paolo Teofilatto

Subject: Engineering, Aerospace Engineering Keywords: disk-gap-band (DGB) parachute; Schiaparelli capsule; re-entry vehicle/capsule,; Aerothermodynamics; compressible flows

Online: 5 May 2023 (10:27:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202304.0190.v1

Experimental Performances Evaluation on Counter-Rotating Coaxial Propellers for Multirotors

Nicola Russo, Aniello Daniele Marano, Giuseppe Maurizio Gagliardi, Michele Guida, Tiziano Polito, Francesco Marulo

Subject: Engineering, Aerospace Engineering Keywords: Multirotors; Coaxial rotors; Counter-rotating propellers; Thrust performances; Noise

Online: 11 April 2023 (04:23:12 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1802.v1

Can the Orbital Debris Disease Be Cured Using Lasers?

Stefan Scharring, Jürgen Kästel

Subject: Engineering, Aerospace Engineering Keywords: Space debris; Space sustainability; Kessler syndrome; Debris removal; High energy lasers; Laser pulse repetition rate; Laser ablation; Laser momentum transfer; Laser-induced heating; Thermo-mechanical integrity

Online: 25 May 2023 (10:46:16 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1480.v1

A FEM Free Vibration Analysis of Variable Stiffness Composite Plates through Hierarchical Modelling

Gaetano Giunta, Domenico Andrea Iannotta, Marco Montemurro

Subject: Engineering, Aerospace Engineering Keywords: Free Vibration Analysis; Finite Element Method; Variable Angle Tow Plates; Carrera's Unified Formulation; Reissner's Mixed Variational Theorem

Online: 22 May 2023 (09:01:03 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.0313.v1

Aircraft Failures Prediction via Adaptive Neuro-Fuzzy Inference System

Masoud Latifinavid, Cemal Balıkçı, Suat Dengiz

Subject: Engineering, Aerospace Engineering Keywords: ANFIS; Decision-making; Failure prediction; Aviation

Online: 5 May 2023 (07:17:49 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.0578.v1

Dynamic Characteristics of a Rotating Blade with a Dovetail Structure

Xiaoyu Fan, Wenchao Liang, Jin Zeng, Yang Yang, Hui Ma, Chenguang Fan, Shunguo Fu

Subject: Engineering, Aerospace Engineering Keywords: rotating blade with a dovetail structure; fixed-interface component mode synthesis method; aerodynamic force; interface contact; dynamic characteristics

Online: 9 May 2023 (05:40:28 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202312.0516.v1

Development and Validation of a Compressible Reacting Gas-Dynamic Flow Solver for Supersonic Combustion

Anvar Gilmanov, Ponnuthurai Gokulakrishnan, Michael S Klassen

Subject: Engineering, Aerospace Engineering Keywords: Scramjet, Gas Dynamics, Supersonic Combustion, Turbulence-Combustion Interaction, Compressible Solver, High-Speed Flows, Large Eddy Simulation (LES).

Online: 7 December 2023 (11:22:08 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202304.0377.v1

Effect of Injection Strategy on the Flow Structure and Performance of Water Ramjet Engine using Magnesium Powder

Yu-Peng Hu, Ben-Quan Zhou, Gang Zhang, Rui Xue, Yun-Kai Wu, Jun-Li Liu

Subject: Engineering, Aerospace Engineering Keywords: solid-magnesium powder water ramjet engine; inlet structure; magnesium-water reaction; numerical simulation

Online: 17 April 2023 (03:05:57 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202309.2122.v1

The Use of Spatially Multi-Component Plasma Structures and Combined Energy Deposition for High-Speed Flow Control. A Selective Review

Olga A. Azarova, Oleg V. Kravchenko

Subject: Engineering, Aerospace Engineering Keywords: supersonic/hypersonic flow control; energy source; bow shock wave; drag force; lift force; boundary layer; separation area; filamentary plasma; plasma actuator; Richtmyer–Meshkov instability; pulsing flow mode; damping flow pulsations

Online: 30 September 2023 (10:30:53 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202304.0421.v1

Mixture Culver Filter for Space Object Orbit Determination

Syed Amer Ahsan Gilani, Lyudmila S Mihaylova, Maheen Fatima Bhutta

Subject: Engineering, Aerospace Engineering Keywords: Bayesian Filtering, Fokker Planck Kolmogorov Equation, Hermite Polynomial, Gram Charlier Series, Space Object Orbit Determination.

Online: 17 April 2023 (07:25:11 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202401.0348.v1

Towards Structural and Aeroelastic Similarity in Scaled Wing Models: Development of an Aeroelastic Optimization Framework

Evangelos Filippou, Spyridon Kilimtzidis, Athanasios Kotzakolios, Vassilis Kostopoulos

Subject: Engineering, Aerospace Engineering Keywords: Aeroelasticity; Structural optimization; Low-fidelity aerodynamics; Aeroelastic scaling; Sizing optimization; Layout optimization

Online: 4 January 2024 (07:26:12 CET)

Show abstract| Download PDF| Share

The pursuit of more efficient transport has led engineers to develop a wide variety of 1 aircraft configurations with the aim of reducing fuel consumption and emissions. However, these 2 innovative designs introduce significant aeroelastic couplings that can potentially lead to structural 3 failure. Consequently, aeroelastic analysis and optimization has become an integral part of modern 4 aircraft design. In addition, aeroelastic testing of scale models is a critical phase in aircraft devel- 5 opment, requiring accurate prediction of aeroelastic behaviour during scale model construction to 6 reduce costs and mitigate risks associated with full-scale flight testing. Achieving a high degree of 7 similarity between the stiffness, mass distribution and flow field characteristics of scaled models 8 and their full-scale counterparts is of paramount importance. However, achieving similarity is 9 not always straightforward due to the variety of configurations of modern lightweight aircraft, as 10 identical geometry cannot always be directly scaled down. This configuration diversity has a direct 11 impact on the aeroelastic response, necessitating the use of computational aeroelasticity tools and 12 optimization algorithms. This paper presents the development of an aeroelastic scaling framework 13 using multidisciplinary optimization. Specifically, a parametric Finite Element Model (FEM) of the 14 wing is created, incorporating parameterisation of both thickness and geometry, primarily using 15 shell elements. Aerodynamic loads are calculated using the Doublet Lattice Method (DLM) em- 16 ploying twist and camber correction factors, and aeroelastic coupling is established using infinite 17 plate splines. The aeroelastic model is then integrated within an Ant Colony optimization (ACO) 18 algorithm to achieve static and dynamic similarity between the scaled model and the reference wing. 19 A notable contribution of this work is the incorporation of internal geometry parameterisation into 20 the framework, increasing its versatility and effectiveness.

Preprint ARTICLE | doi:10.20944/preprints202305.2042.v1

Correlative Method for Diagnosing Gas-Turbine Tribological Systems

Maciej Deliś, Sylwester Kłysz, Radoslaw Przysowa

Subject: Engineering, Aerospace Engineering Keywords: wear debris; oil analysis; emission spectroscopy; turboprop; propeller governor; ANOVA; interaction analysis; condition indicator

Online: 30 May 2023 (04:36:03 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1957.v1

A Low-Cost Perception and Control System for In-flight Collision Avoidance of UAVs Based on Background Subtraction

Jeonghwan Park, Andrew Jaeyong Choi

Subject: Engineering, Aerospace Engineering Keywords: unmanned aerial vehicle; collision avoidance; trajectory estimation; feature-point matching; op-tical flow; background subtraction

Online: 29 May 2023 (04:09:21 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202210.0007.v1

Optimal Propellant-less Control of a Solar Sail

Andre Pittella, Timothy Sands

Subject: Engineering, Aerospace Engineering Keywords: optimal control; solar sails; Lagrange points; Pontryagin’s Principle

Online: 3 October 2022 (12:13:19 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.2176.v1

About the Combination of Cross-Correlation Analysis and Ultrasonic-GW Tomographic Technique for BVID Impact Detection Capability Assessment

Monica Ciminello, Natalino Daniele Boffa, Salvatore Ameduri, Ernesto Monaco

Subject: Engineering, Aerospace Engineering Keywords: Composite structures; Structural health monitoring; Cross-correlation analysis; Guided waves; Piezoelectric sensors

Online: 31 May 2023 (07:09:47 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1629.v1

Balloon-based Exposed Payload Designed for Astrobiological Research in Earth’s Near Space

Yanqiu Wang, Chao Wang, Jianxun Shen, Weining Li, Gaohong Wang, Wei Lin, Yuanda Jiang

Subject: Engineering, Aerospace Engineering Keywords: Earth’s near space; Biological Samples Exposure; Mars; Venus; atmosphere; astrobiology

Online: 23 May 2023 (08:47:39 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202309.0653.v1

Assessing the Effects of Alcohol Influence on Manual Unmanned Aerial Vehicle Control: An Experimental Study on Flight Capability and Precision

Rafał Perz, Igor Dąbrowski, Michał Kuminarczyk, Izabella Kurlanda, Filip Zakrzewski, Paweł Małecki, Łukasz Popek, Konrad Barys, Artur Abratański, Andrzej Łukaszewicz, Kamil Molenda

Subject: Engineering, Aerospace Engineering Keywords: UAV; alcohol impact; flight precision; UAV control

Online: 11 September 2023 (11:16:49 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.2062.v1

Influence of Metal Magnesium Addition on Detonation Initiation in Shock Wave Focusing

Yu-Peng Hu, Yun-Tian Zhang, Peng Du, Rui Xue, Yi-Jun Wang, Ben-Quan Zhou

Subject: Engineering, Aerospace Engineering Keywords: Magnesium particle; Shock wave focusing; Detonation wave; DDT

Online: 30 May 2023 (07:11:13 CEST)

Show abstract| Download PDF| Share

Preprint COMMUNICATION | doi:10.20944/preprints202310.0263.v1

Maximum thrust nozzle based on height constraint

Bowen Huang, Jinglei Xu, Kaikai Yu

Subject: Engineering, Aerospace Engineering Keywords: maximum thrust theory; MOC; height constraints; nozzle; scramjet

Online: 5 October 2023 (10:13:20 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202307.0217.v1

Tests of the Tethered Class C3 Hexacopter in Maritime Conditions on the Landing Pad of a Ferry

Cezary Kownacki, Leszek Ambroziak, Maciej Ciężkowski, Adam Wolniakowski, Sławomir Romaniuk, Zbigniew Kulesza, Arkadiusz Bożko, Daniel Ołdziej

Subject: Engineering, Aerospace Engineering Keywords: tethered multicopter; hexacopter; precision landing; moving landing pad; maritime conditions; tether unwinder

Online: 4 July 2023 (11:24:37 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1436.v1

Weak Spatial Target Extraction Based on Small-Field Optical System

Xuguang Zhang, Yunmeng Liu, Huixian Duan, E Zhang

Subject: Engineering, Aerospace Engineering Keywords: Small-field telescope; Space target detection; Image preprocessing; Target signal enhancement; Multi frame projection; Adaptive filtering

Online: 19 May 2023 (10:57:42 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.0155.v1

Numerical Investigation on Hypersonic Flat-Plate Boundary Layer Transition Subjected to Bi-frequency Synthetic Jet

Xinyi Liu, Zhenbing Luo, Qiang Liu, Pan Cheng, Yan Zhou

Subject: Engineering, Aerospace Engineering Keywords: hypersonic boundary layer transition; transition delay; bi-frequency synthetic jet; flow control; linear stability theory

Online: 2 June 2023 (08:22:32 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1798.v1

Design and Operation of a Gripper for a Berthing Task

Alexander Titov, Matteo Russo, Marco Ceccarelli

Subject: Engineering, Aerospace Engineering Keywords: Space Robotics; On-Orbit Service Robotics; Space Berthing; Space Grippers; CubeSats

Online: 25 May 2023 (10:29:58 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.0951.v1

Trajectory Optimization and Control Applied to Landing Maneuvers on Phobos from Mars-Phobos Distant Retrograde Orbits

Vittorio Baraldi, Davide Conte

Subject: Engineering, Aerospace Engineering Keywords: Mars; Distant Retrograde Orbits; Phobos; Particle Swarm Optimization; landing trajectories

Online: 13 June 2023 (15:38:46 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202311.1970.v1

Effects of Model Specific Parameters on the Development of Custom Module in PX4 Autopilot Software-In-The-Loop

Abera Tullu, Sunghun Jung, Sangchul Lee, Sangho Ko

Subject: Engineering, Aerospace Engineering Keywords: Software-in-the-loop; custom module; virtual environment; Gazebo plugins

Online: 30 November 2023 (10:43:17 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202304.0866.v1

Effect of Scarf Repair Geometry on the Impact Performance of Aerospace Composites

Vijay Shakaran Sridharan, Sridhar Idapalapati

Subject: Engineering, Aerospace Engineering Keywords: Scarf patch; Film adhesive; Secondary bonding; Impact loading; Failure analysis

Online: 25 April 2023 (02:49:42 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202311.0136.v1

Effect of Hole Size on Open Hole Tensile (OHT) and Flexural Strength (OHF) of Aramid-Basalt Fibre Reinforced Polymer Composites

Oshin Fernandes, Jyoti Dutta, Yogeesha Pai, Mahesha G T, Ravishanker Baliga

Subject: Engineering, Aerospace Engineering Keywords: Open hole tensile test; Hybrid composite; Damage mechanism; Hole diameter; SEM

Online: 2 November 2023 (09:10:47 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202401.2000.v1

Computational Analysis of Various Winglet Design Types on a Boeing 737 Aircraft

Gideon Dunmoye

Subject: Engineering, Aerospace Engineering Keywords: SOLIDWORKS; lift-to-drag ratio; winglet; wingtip devices; lift; drag; vortices; pressure; angle of attack

Online: 29 January 2024 (08:47:52 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202309.0133.v1

A Practical Star Image Registration Algorithm Using Radial Module and Rotation Angle Features

Quan Sun, Lei Liu, Zhaodong Niu, Yabo Li, Jingyi Zhang, Zhuang Wang

Subject: Engineering, Aerospace Engineering Keywords: Star image registration; Radial module feature; Rotation angle feature; Robustness; Real-time

Online: 4 September 2023 (07:16:38 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202308.0039.v1

Predictor-corrector Guidance for Hypersonic Morphing Vehicle

Dongdong Yao, Qunli Xia

Subject: Engineering, Aerospace Engineering Keywords: hypersonic morphing vehicle; predictor-corrector guidance; Q-learning; B-spline curve; Monte Carlo reinforcement learning

Online: 1 August 2023 (08:27:13 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202402.0310.v1

Helicopter Planet Gear Rim Crack Diagnosis and Trending Using Cepstrum Editing Enhanced with Deconvolution

Nader Sawalhi, Wenyi Wang, David Blunt

Subject: Engineering, Aerospace Engineering Keywords: Planet Gear; Rim Crack; Cepstrum Editing; Liftering; Minimum Entropy Deconvolution (MED); Signal Synchronous Average (SSA)

Online: 6 February 2024 (09:18:17 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202310.0541.v1

Review and Assessment on Fatigue Delamination Damage of Laminated Composite Structures

Jinghui Deng, Jie Zhou, Tangzhen Wu, Zhengliang Liu, Zhen Wu

Subject: Engineering, Aerospace Engineering Keywords: Laminated structures; fatigue delamination; phenomenological model; Paris law; cohesive element; numerical methods

Online: 9 October 2023 (13:05:42 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.2005.v1

Research on Pilot Control Strategy and Workload for Tilt-Rotor Aircraft Conversion Procedure

Xufei Yan, Ye Yuan, Renliang Chen

Subject: Engineering, Aerospace Engineering Keywords: tilt-rotor; conversion; optimal control model; pilot workload; wavelet transform

Online: 29 June 2023 (05:38:44 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202307.0087.v1

Review on Type of Sensors and Detection Method of Anti-Collision System of Unmanned Aerial Vehicle

Navaneetha Krishna Chandran, Mohammed Thariq Hameed Sultan, Andrzej Łukaszewicz, Farah Syazwani Shahar, Andriy Holovatyy, Wojciech Giernacki

Subject: Engineering, Aerospace Engineering Keywords: anti-collision methods; detection system; sensors; unmanned aerial vehicle; UAV

Online: 4 July 2023 (02:59:26 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.1978.v1

Experimental Characterization of Composite Printed Materials for the Production of Multirotor UAV Airframe Parts

Tomislav Šančić, Marino Brčić, Denis Kotarski, Andrzej Łukaszewicz

Subject: Engineering, Aerospace Engineering Keywords: UAV; additive manufacturing; material experimental characterization; multirotor UAV airframe; CAx; CAD

Online: 28 June 2023 (09:34:46 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.1282.v1

Dynamic Behavior Modeling of Natural Rubber/Polybutadiene Rubber-Based Hybrid Magnetorheological Elastomer Sandwich Composite Structures

Ahobal .N, Lakshmi Pathi J, Sakthivel G, Mohanraj Thangamuthu, Jegadeeshwaran Rakkiyannan, Yogesh Jayant Bhalerao

Subject: Engineering, Aerospace Engineering Keywords: hybrid MRE; sandwich structures; smart structures; dynamic behavior modeling; vibration; polymer composites

Online: 20 October 2023 (07:53:25 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202309.0675.v1

Control of Aerodynamic Characteristics of Thick Airfoils at Low Reynolds Numbers Using Energy Methods

Pavel Bulat, Pavel Chernyshov, Nickolay Prodan, Konstantin Volkov

Subject: Engineering, Aerospace Engineering Keywords: aerodynamics; airfoil; flow control; turbulence; boundary layer; lift; drag

Online: 12 September 2023 (04:40:30 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202402.0968.v1

Info-Geometric Analysis of Gamma Distribution Manifold with Gamma Distribution Impact to Advance Satellite Earth Observations

Dr Ismail A Mageed

Subject: Engineering, Aerospace Engineering Keywords: Information Geometry(IG); Gamma Distribution (GD); Satellite Earth Observations (SEOs); Geodesic Equations (GEs)

Online: 19 February 2024 (14:27:50 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.1059.v1

Impact of a Thermally Stratified Energy Source in a Supersonic Flow past a Pointed Cylinder Aerodynamic Model on the Pressure Signatures and PLdB Effect on the Ground

O. V. Kravchenko, O. A. Azarova, D. D. Knight

Subject: Engineering, Aerospace Engineering Keywords: supersonic flow; bow shock wave; thermally stratified energy source; drag force control; pressure signature; noise generation; sonic boom

Online: 14 June 2023 (14:37:30 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202401.1213.v1

Deep Deterministic Policy Gradient (DDPG) Agent-Based Sliding Mode Control for Quadrotor Attitudes

Wenjun Hu, Yueneng Yang, Zhiyang Liu

Subject: Engineering, Aerospace Engineering Keywords: quadrotor; attitude control; deep deterministic policy gradient; gain adjusted; sliding mode control

Online: 16 January 2024 (09:09:33 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202312.2334.v1

Multiphysics Modeling of a Synthetic Jet Actuator in Operation

Matthew G Butler, Alis Ekmekci, Pierre Edward Sullivan

Subject: Engineering, Aerospace Engineering Keywords: Synthetic Jets; Flow Control; Multiphysics Modeling

Online: 30 December 2023 (09:02:15 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202304.0252.v1

Neural Network Technology for Cryptographic Protection of Data Transmission at UAV

Ivan Tsmots, Vasyl Teslyuk, Andrzej Łukaszewicz, Yurii Lukashchuk, Iryna Kazymyra, Andriy Holovatyy, Yurii Opotyak

Subject: Engineering, Aerospace Engineering Keywords: neural network technology; cryptographic protection; UAV; UAS, onboard system; encryption; decryption; tabular-algorithmic method; scalar product; real time

Online: 12 April 2023 (07:32:24 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202308.0962.v1

Investigation on the Influence of Wake Field Characteristic Structure on Downstream Target Using POD Method

Jiawei Fu, Junhui Wang, Jifei Wu, Ke Xu, Shuling Tian

Subject: Engineering, Aerospace Engineering Keywords: Proper orthogonal decomposition (POD); Domain precursor simulation method; Low-speed wake; Flow structure

Online: 14 August 2023 (09:03:44 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.1145.v1

Bilinear Interpolation of Three-Dimensional Gain-Scheduled Autopilots

Sung Mo Koo, Timothy Sands

Subject: Engineering, Aerospace Engineering Keywords: gain-scheduled autopilots; nonlinear control; bilinear interpolation; control and guidance; control gains; three-dimensional lookup table (3D-LUT)

Online: 18 October 2023 (11:37:25 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202309.1914.v1

Effect of Variation of Location of the Blowing on the Aerodynamic Characteristics over the Delta Wing

Sugandh Gupta, Sanjeev Kumar, Rakesh Kumar

Subject: Engineering, Aerospace Engineering Keywords: vortex breakdown; jet momentum coefficient; sweep angle; delta wing; blowing

Online: 28 September 2023 (03:35:07 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.0331.v1

Application of Optimal Scheduling for SAR Satellite Constellation: Multi-Imaging Mission in High-Density Regional Area

Kimoon Lee, Dongjin Kim, Daewon Chung, Seonho Lee

Subject: Engineering, Aerospace Engineering Keywords: Optimal scheduling; Synthetic Aperture Radar (SAR); Satellite constellation; Multi-imaging mission; High-density regional area; Modified Dynamic Programming (MDP)

Online: 6 March 2024 (07:13:48 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202307.1983.v1

Study on Effects of Modern Turbine Blade Coolant Injecting Nozzle Position on Film Cooling and Vortex Composite Performance under Rotating Conditions

Jiefeng Wang, Eddie Yin Kwee NG, Jianwu Li, Yanan Huang, Yanhao Cao, Liang Li

Subject: Engineering, Aerospace Engineering Keywords: Vortex cooling; Injecting nozzle location; Gas turbine; Blade film cooling; Heat transfer

Online: 28 July 2023 (09:54:15 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202401.1077.v1

Low-Thrust Trajectory Optimization for Earth-Mars-Jupiter Gravity-Assist Spacecraft Mission

Mohammadreza Saghamanesh, Weidong Hu, Vahid Rastinasab

Subject: Engineering, Aerospace Engineering Keywords: Earth-Mars-Jupiter Gravity-Assist; Low-Thrust Spacecraft Mission; trajectory optimization; homotopy method; fuel-optimal control

Online: 15 January 2024 (06:18:43 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1195.v1

A GPU-Accelerated Particle Advection Methodology for 3D Lagrangian Coherent Structures in High-Speed Turbulent Boundary Layers

Christian Lagares, Guillermo Araya

Subject: Engineering, Aerospace Engineering Keywords: LCS; GPU Accelerated; Particle Advection; Distributed Memory Algorithms; High Speed 24 Turbulent Boundary Layers; DNS

Online: 17 May 2023 (05:36:15 CEST)

Show abstract| Download PDF| Share

In this work, we introduce a scalable and efficient GPU-accelerated methodology for volumetric particle advection and finite-time Lyapunov exponent (FTLE) calculation, focusing on the analysis of Lagrangian Coherent Structures (LCS) in large-scale Direct Numerical Simulation (DNS) datasets across incompressible, supersonic, and hypersonic flow regimes. LCS play a significant role in turbulent boundary layer analysis, and our proposed methodology offers valuable insights into their behavior in various flow conditions. Our novel owning-cell locator method enables efficient, constant-time cell search, and the algorithm draws inspiration from classical search algorithms and modern multi-level approaches in numerical linear algebra. The proposed method is implemented for both multi-core CPUs and Nvidia GPUs, demonstrating strong scaling up to 32,768 CPU cores and up to 62 Nvidia V100 GPUs. By decoupling particle advection from other problems, we achieve modularity and extensibility, resulting in consistent parallel efficiency across different architectures. Our methodology was applied to calculate and visualize the FTLE on four turbulent boundary layers at different Reynolds and Mach numbers, revealing that coherent structures grow more isotropic proportional to the Mach number, and their inclination angle varies along the streamwise direction. We also observed increased anisotropy and FTLE organization at lower Reynolds numbers, with structures retaining coherency along both spanwise and streamwise directions. Additionally, we demonstrated the impact of lower temporal frequency sampling by upscaling with an efficient linear upsampler, preserving general trends with only 10% of the required storage. In summary, we present a particle search scheme for particle advection workloads in the context of visualizing LCS via FTLE that exhibits strong scaling performance and efficiency at scale. Our proposed algorithm is applicable across various domains requiring efficient search algorithms in large structured domains. While this manuscript focuses on the methodology and its application to LCS, an in-depth study of the physics and compressibility effects in LCS candidates will be explored in a future publication.

Preprint ARTICLE | doi:10.20944/preprints202311.0856.v1

Techno-Economic Review of Low Carbon Energies Based on Electricity for Air Mobility.

Jean-Baptiste Jarin, Stéphane Beddok, Carole Haritchabalet

Subject: Engineering, Aerospace Engineering Keywords: air mobility; efuel; hydrogen; battery electric; CO₂

Online: 14 November 2023 (16:54:19 CET)

Show abstract| Download PDF| Share