Search | Preprints.org

Preprint ARTICLE | doi:10.20944/preprints202409.1245.v1

Stochastic H∞ Filtering of the Attitude Quaternion

Daniel Choukroun, Lotan Cooper, Nadav Berman

Subject: Engineering, Aerospace Engineering Keywords: Stochastic H∞ filtering; Attitude determination; Quaternion; Uncertain sensor variance

Online: 16 September 2024 (14:24:05 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.1088.v1

Adaptive Sliding Mode Control for Trajectory Tracking of Quadrotor UAV under Input Saturation and Disturbances

Jingyang Kuang, Mou Chen

Subject: Engineering, Aerospace Engineering Keywords: trajectory tracking control; sliding mode control; disturbance observer; input saturation; parametric uncertainties

Online: 16 September 2024 (07:32:43 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.1009.v1

The Flight Test Results of Altitude Stabilization System Dedicated for the Wing-in-Ground UAV

Marcin Chodnicki, Krzysztof Falkowski, Norbert Sigiel

Subject: Engineering, Aerospace Engineering Keywords: eyword; autopilot; wing-in-ground (WIG); control system; drones; flight tests; UAV; RPAS; autonomous robots; autonomous systems; linear systems; switched systems

Online: 12 September 2024 (13:10:23 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0973.v1

Multi-objective Evolutionary Optimization of Transonic Natural Laminar Flow Wing at High Reynolds Number

Shaojun Luo, Zhili Tang, Yongbin Chen

Subject: Engineering, Aerospace Engineering Keywords: Variable-fidelity hierarchical evolutionary optimization; Pareto non-dominated solutions; Transition predicition; Natural laminar flow wing; Shock wave control technology

Online: 12 September 2024 (07:39:03 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.0787.v2

Stress Analysis of GFRP Lap Joints with Modified Adhesives at Various Temperatures

Hasan Caglar, Sridhar Idapalapati, Mohit Sharma, Chian Kerm Sin

Subject: Engineering, Aerospace Engineering Keywords: stress distribution; adhesive bonding; temperature effects; finite element analysis; analytical solutions

Online: 11 September 2024 (09:39:25 CEST)

Show abstract| Download PDF| Share

This study examines stress distributions in adhesive joints under various loading and temperature conditions. Finite element analysis (FEA) was employed to compute the peel and shear stresses at the adhesive interface and bondline mid-section. Dependency analysis shows that mid-section peel stress significantly impacts the experimental shear strength of SLJs more than shear stress. This insight highlights the need to carefully analyze peel stress and bending moment factors. The analytical solutions proposed by Goland and Reissner were analyzed with modifications by Hart-Smith and Zhao. Hart-Smith’s approach performed more effectively, especially when the adhesive layer thickness (t_a) is 0.5 mm and the overlap length to thickness ratio (c/t_a) is ≥20. FEA revealed stress distributions at the adhesive/adherend interface and bondline mid-section. DP490 adhesive joints exhibited lower stresses than EA9696. Temperature variations significantly affected joint behavior, particularly above the adhesive’s glass transition temperature (T_g). Both EA9696 and DP490 adhesive joints displayed distinct responses to stress and temperature changes. The parabolic and biquadratic solutions for functionally graded adhesive (FGA) joints were compared. The biquadratic solution consistently yielded higher shear and peel stress values, with an increase ranging from 15% to 71% compared to the parabolic solution at various temperatures because of larger gradient of the Young's modulus distribution near the overlap ends. The ratio of peak peel stress to peak shear stress suggests selecting an adhesive with a superior peel strength or primarily reducing the peak peel stress by functionally grading is advisable, particularly if the adhesive is brittle. Comparison of stress distributions emphasize the importance of selecting adhesives based on stress type, temperature, and solution methods in optimizing adhesive bonding applications. These findings provide valuable insights for thermomechanical applications where thermal stimuli may be used for controlled debonding.

Preprint ARTICLE | doi:10.20944/preprints202409.0743.v1

Competitiveness Evaluation Method of Supersonic Civil Aircraft Based on Analytic Hierarchy Process

Jiazheng He, Rui Pan, Wenyuan Cheng, Chenxin Guo, Zhijun Meng

Subject: Engineering, Aerospace Engineering Keywords: supersonic civil aircraft; analytic hierarchy process; competitiveness; social acceptance

Online: 10 September 2024 (15:12:58 CEST)

Show abstract| Download PDF| Share

Preprint CONCEPT PAPER | doi:10.20944/preprints202409.0402.v1

Optimized Fabrication of Adams Pulse Motor Integrated with Arduino Microcontroller for Ease of Operations

Nachiketh Nadig, Aditya Gautam, Navya Moolrajani, Ajin Branesh Asokan, Gurmail Singh Malhi

Subject: Engineering, Aerospace Engineering Keywords: Adams Pulse Motor; Arduino Microcontroller; Sustainability; Electromagnetism

Online: 5 September 2024 (08:20:40 CEST)

Show abstract| Download PDF| Share

The search for more sustainable and efficient propulsion & power systems has become a focal point in aerospace engineering, driven by the necessity to reduce carbon emissions and mitigate environmental impact. In response, this paper explores the optimized fabrication of an Adams pulse motor integrated with an Arduino microcontroller, aiming to enhance performance while addressing the specific demands of aerospace applications. The Adams pulse motor, renowned for its simplicity and efficiency, serves as the basis of this study. Operating on the principles of electromagnetism, the motor comprises a stator and rotor configuration. When given electricity in pulses, the magnetic fields generated by stators interact with the rotor, inducing rotational motion. This simplicity makes the Adams pulse motor an attractive candidate for aerospace propulsion systems, where reliability and fuel efficiency are very important. Integration with an Arduino microcontroller introduces sophisticated control capabilities, enabling real-time adjustment of motor parameters such as speed, torque, and direction. Furthermore, the Arduino facilitates sensor feedback integration, allowing for autonomous operation and fault detection. This level of control not only enhances performance but also contributes to overall system reliability. One of the key highlights of this study is the application of the optimized Adams pulse motor integrated with an Arduino microcontroller in the aerospace industry. Aircraft propulsion systems are undergoing a shift towards more sustainable alternatives. The integration of the Adams pulse motor with Arduino aligns with this motive, offering a greener and more efficient propulsion/ power solution for aerospace applications. In conclusion, the optimized fabrication of Adams pulse motors integrated with Arduino microcontrollers holds tremendous promise for the aerospace industry. As the demand for sustainable propulsion solutions continues to grow, this integrated system presents a compelling option for future aircraft propulsion systems.

Preprint ARTICLE | doi:10.20944/preprints202409.0216.v1

Data-Driven Sparse Sensor Placement Optimization on Wings for Flight-by-Feel: Bioinspired Approach and Application

Alex Hollenbeck, Atticus Beachy, Ramana Grandhi, Alexander Pankonien

Subject: Engineering, Aerospace Engineering Keywords: Optimization; Sparse Sensing; Flow Sensors; Flight Control; Fly-by-Feel; Artificial Hair Sensors; Data Reduction

Online: 3 September 2024 (09:05:42 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0081.v1

Lunar Finite Element Gravity Model

Giaky Nguyen, Ahmad Bani Younes, Ahmed Atallah

Subject: Engineering, Aerospace Engineering Keywords: Spherical harmonics model; Finite element model; Lunar gravity model

Online: 2 September 2024 (10:50:46 CEST)

Show abstract| Download PDF| Share

In this paper, we integrate the Finite Element Method (FEM) with orthogonal polynomial approximation in high-dimensional spaces to innovatively model the Moon’s surface gravity anomaly. Our aim is to approximate solutions to Laplace’s classical differential equations of gravity, employing classical Chebyshev polynomials as basis functions. Using classical Chebyshev polynomials as basis functions, the least-squares approximation was used to approximate discrete samples of the approximation function. These test functions provide an understanding of errors in approximation and corresponding errors due to differentiation and integration. These test functions provide an understanding of errors in approximation and corresponding errors due to differentiation and integration. The first application of this project is to substitute the globally-valid classical spherical harmonic series of approximations with locally-valid series of orthogonal polynomial approximations (i.e. using the FEM approach). With an error tolerance set at 10−9ms−2, we use this method to adapt the gravity model radially upwards from the lunar surface. The results showcase a need for a higher degree of approximation on and near the lunar surface, with the necessity decreasing as the radius increases. Notably, this method achieves a computational speedup of five orders of magnitude when applying the method to radial adaptation. More intrinsically, our second application involves using the methodology as an effective tool in solving boundary value problems. Specifically, we implement this approach to solve classical differential equations involved with high precision, long-term orbit propagation. This application provides a four-order of magnitude speedup in computational time while maintaining an error within the 10−10ms−2 error range for various orbit propagation tests. Alongside the advancements in orthogonal approximation theory, the FEM enables revolutionary speedups in orbit propagation without compromising accuracy.

Preprint ARTICLE | doi:10.20944/preprints202408.2092.v1

Design and On-Orbit Performance of Ku-Band Phase-Array SAR Payload System

Wei Yan, Xiaomin Tan, Jiang Wu, Mingze Yuan, Hongxing Dang, Wujun Chang

Subject: Engineering, Aerospace Engineering Keywords: Ku band; SAR system; payload; Taijing-4(03); on-orbit; application; micro-nano; satellite

Online: 29 August 2024 (07:14:22 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.1425.v1

Development of 6DOF Hardware-In-the-Loop Ground Testbed for Autonomous Robotic Space Debris Removal

Ahmad Al Ali, Bahador Beigomi, Zheng H. Zhu

Subject: Engineering, Aerospace Engineering Keywords: 3-Dimentional Microgravity Testbed; Robotic Manipulator; Robotic Finger Griper; Hardware-In-the-Loop; Active Gravity Compensation; Computer Vision; Tactile Sensing

Online: 22 August 2024 (02:15:19 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.1445.v1

Research on High-Dynamic Tracking Algorithms for FH-BOC Signals

Xue Li, Shun Zhao, Xinyue Hou, Lulu Wang, Yinsen Zhang

Subject: Engineering, Aerospace Engineering Keywords: GNSS; FH-BOC; high dynamic tracking; carrier tracking loop; adaptive Kalman filter; composite code loop

Online: 20 August 2024 (13:52:48 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.1080.v1

Development and Validation of a Thermal Model for Selective Laser Melting of 316L SS and Ti6AI4V

Gasser Abdelal, Daniel Higgins, Chi-Wai Chan, Brian Falzon

Subject: Engineering, Aerospace Engineering Keywords: selective laser melting; thermal model; finite element analysis; 316L SS; Ti64AI4V; abaqus; additive manufacturing; temperature distribution; melt pool dynamics; laser ; processing parameters; microstructural evolution ;

Online: 20 August 2024 (03:50:18 CEST)

Show abstract| Download PDF| Share

Selective Laser Melting (SLM) is a complex additive manufacturing process that requires precise control of thermal conditions to ensure the quality and reliability of produced parts. The main challenge lies in accurately predicting the thermal behavior during SLM, which is influenced by rapid heating and cooling cycles, high thermal gradients, and temperature-dependent material properties. This study addresses this challenge by developing a comprehensive thermal model for the SLM process of 316L stainless steel (316L SS) and Ti6Al4V titanium alloy using Finite Element Analysis (FEA) in Abaqus. The model incorporates temperature-dependent material properties and phase transformations to simulate the temperature distribution and thermal history during SLM. To validate the model, experimental studies were conducted using custom-designed argon chambers and stainless-steel powder. The experimental results showed strong agreement with the simulated melt pool dimensions and thermal histories, confirming the model's accuracy. Key findings include the model's ability to predict the effects of varying processing parameters such as laser power and scanning speed on thermal behavior and melt pool characteristics. This validated model serves as a valuable tool for optimizing SLM processing parameters, enhancing the un-derstanding of thermal phenomena in additive manufacturing, and improving the quality and reliability of manufactured parts. Due to budget constraints, experimental validation was initially performed only on 316L SS. This approach allowed for the tuning of the finite element model before extending its application to Ti6Al4V. The successful validation with 316L SS provides a solid foundation for applying the model to more challenging materials like Ti6Al4V, ensuring cost-effectiveness and safety in initial experimentation. The novelty of this research lies in its detailed and validated thermal model, which bridges the gap between experimental and numerical approaches in SLM. By accurately simulating and validating the thermal processes involved in SLM, this study contributes to the advancement of additive manufacturing technologies and offers practical insights for industrial applications.

Preprint ARTICLE | doi:10.20944/preprints202408.1092.v1

Determination of Local Heat Transfer Coefficients and Friction Factors at Variable Temperature and Velocity Boundary Conditions for Complex Flows

Christopher Hartmann, Jens von Wolfersdorf

Subject: Engineering, Aerospace Engineering Keywords: conjugate heat-transfer; adiabatic wall temperature; equilibrium turbulent boundary layer; Reynolds analogy; wall shear stresses; pressure gradient effects

Online: 14 August 2024 (16:58:10 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.0760.v1

Sensitivity Analysis of Airfoil Deformation for Aerial-Aquatic Navigation

Chengrong Du, Dongbiao Zhao

Subject: Engineering, Aerospace Engineering Keywords: Deformable airfoil parameterization; Aerial-aquatic airfoil; Iso-geometric method; Sobol analysis

Online: 12 August 2024 (12:34:59 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.0423.v1

Flight Control Design Based on Nonlinear Dynamic Inversion for Post-Stall Maneuvers

Ciann-Dong Yang, Shun-Yuan Chang

Subject: Engineering, Aerospace Engineering Keywords: nonlinear dynamic inversion; control allocation; thrust vectoring control; high angle-of- attack flight; post-stall maneuver

Online: 7 August 2024 (03:37:09 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202408.0346.v1

Local Defect Resonance: A Wild Card for NDT and Defect Imaging in Composites

Igor Solodov, Julian Ehrler, Linus Littner, Marc Kreutzbruck

Subject: Engineering, Aerospace Engineering Keywords: composite defects; local defect resonance; resonance acoustic emission

Online: 6 August 2024 (06:29:32 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.0256.v1

Structural Analysis and Experimental Tests of a Morphing Flap Scaled Model

Mürüvvet Sinem SICIM DEMIRCI, Rosario PECORA, Luca CHIANESE, Massimo Viscardi, Metin Orhan KAYA

Subject: Engineering, Aerospace Engineering Keywords: Morphing structures; Smart aircraft; Morphing flap; Adaptive systems; Intelligent systems; Finger-like ribs; Mechanical systems; Large airplanes; Wind tunnel tests; Large-scale morphing architectures; Computational Fluid Dynamics (CFD) analysis; Variable camber airfoil

Online: 5 August 2024 (11:09:46 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.1465.v2

Energy-Optimized 3D Path Planning for Unmanned Aerial Vehicle

István Nagy, Edit Laufer

Subject: Engineering, Aerospace Engineering Keywords: UAV; trajectory planning; trajectory optimization; 3D environment; energy map

Online: 30 July 2024 (11:54:57 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.2258.v1

Numerical Analysis of the Effect of Different Nose Shapes on Train Aerodynamic Performance

Paolo Schito, Luigi Vigevano, Stefano Negri, Kerian Chauvin, Gianluca Colavito, Eric Landolfi

Subject: Engineering, Aerospace Engineering Keywords: High-speed train; Train nose length; Aerodynamic performance; Flow structure; Drag Reduction

Online: 30 July 2024 (09:15:33 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.2115.v1

Runway Safety Assistant Foreseeing Excursions: Calculating Means

Georgios Alogdianakis, Ioannis katsidimas, Athanasios Kotzakolios, Anastasios Plioutsias, Vassilis Kostopoulos

Subject: Engineering, Aerospace Engineering Keywords: Avionics; Decision Support System; Embedded System; Runway Safety; Runway Excursions

Online: 26 July 2024 (10:00:15 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.1992.v1

Optimization of Airfoils for the Design of Long Endurance Aircrafts Using Deep Learning Models and Metaheuristics Algorithms

Jose Gabriel Quijada Pioquinto, Valentin Shakhov, Evgenii Minaev, Evgenii Kurkin, Oleg Lukyanov

Subject: Engineering, Aerospace Engineering Keywords: airfoil optimization; OpenFOAM; deep learning models; metaheuristics algorithms; method CST

Online: 25 July 2024 (12:58:42 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.1866.v1

Effect of Gurney Flaps on Non-Planar Wings at Low Reynolds Number

Lance W Traub

Subject: Engineering, Aerospace Engineering Keywords: Gurney flap; non-planar wings; low Reynolds number; wind tunnel testing; spanwise camber

Online: 24 July 2024 (16:40:26 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.1899.v1

Construction and Verification on the Isoi Small Spacecraft (SXC3-219) Models for Estimating the Methodological Error in Calculating the Angular Velocity Based on On-Board Measurements of the Induction Vector of the Earth’s Magnetic Field

Andry Sedelnikov, Roman Skidanov, Luiza Manukyan, Maksim Ivanushkin, Marsel Mordanov

Subject: Engineering, Aerospace Engineering Keywords: small spacecraft; rotational motion; magnetometer; methodological error; accuracy of angula; velocity estimation

Online: 24 July 2024 (10:41:07 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.1513.v1

Performance Enhancement of MRAC via Generalized Dynamic Inversion

Alharith Mahmoud Fadlalah, Abdulrahman Bajodah

Subject: Engineering, Aerospace Engineering Keywords: Null control vector; Projection matrix; Model Reference Adaptive Control; Generalized Dynamic Inversion; Lyapunov Stability

Online: 18 July 2024 (16:47:36 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.1506.v1

Preliminary Evaluation of Performance, Cost and Environmental Sustainability of a LH2‐Powered Narrow Body Aircraft

Davide Ferretto¹, Simone Camboni¹, Roberta Fusaro²

Subject: Engineering, Aerospace Engineering Keywords: liquid hydrogen; sustainable aviation; aircraft conceptual design; operating costs estimation; hydrogen production emissions

Online: 18 July 2024 (14:41:49 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.1383.v1

A Peak Finding Siamese Convolutional Neural Network (PF-SCNN) for Aero-engine Hot Jet FT-IR Spectrum Classification

Shuhan Du, Wei Han, Zhenping Kang, Fengkun Luo, Yurong Liao, Zhaoming Li

Subject: Engineering, Aerospace Engineering Keywords: infrared spectrum detection; FT-IR; aero-engine hot jet; siamese convolutional neural network networks; peak finding

Online: 17 July 2024 (13:41:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.1346.v1

Aerodynamic Drag Coefficient Prediction of a Spike Blunt Body Based on K-Nearest Neighbours.

Jonathan Arturo Sanchez-Muñoz, Christian Lagarza-Cortés, Jorge Ramírez-Cruz

Subject: Engineering, Aerospace Engineering Keywords: K nearest neighbours; Aerodynamic Drag Coefficient; Computational Fluid Dynamics; spike blunt body

Online: 16 July 2024 (14:51:47 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0552.v1

Software Development Process Considerations in Drones’ GNSS-Denied Navigation Project

Sebastian Rutkowski, and Cezary Szczepański

Subject: Engineering, Aerospace Engineering Keywords: Software Engineering, Systems Engineering, Quality, Development Processes, Drone-dedicated software development.

Online: 5 July 2024 (22:16:36 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0409.v1

Analysis and Investigation of Thermodynamic Improvement and Exergy of Turbofan Engine Using Fuzzy Logic and Meta-Heuristic Optimizers

Mohammadamin Nourianpour, Mohammadreza Banitalebidehkordi

Subject: Engineering, Aerospace Engineering Keywords: Thermodynamic improvement; Meta-heuristic optimization; Exergy analysis; Turbofan engine performance; Turbofan efficiency

Online: 4 July 2024 (11:12:38 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0265.v1

Developing an Intelligent Drone Management System for Smart City Transportation Networks

D. Dung Nguyen, Q. Dat Dang

Subject: Engineering, Aerospace Engineering Keywords: UTM; ATM; Intelligent Transportation System; UAV; Smart City

Online: 3 July 2024 (02:49:51 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0110.v1

Damage Detection and Localization Methodology Based on Strain Measurements and Finite Element Analysis: SHM in the Context of Industry 4.0

Andres R. Herrera, Joham Alvarez, Jaime Restrepo, Camilo Herrera, Sven Rodríguez, Carlos A. Escobar, Rafael E. Vásquez, Julian Sierra-Perez

Subject: Engineering, Aerospace Engineering Keywords: Industry 4.0; Structural Health Monitoring; damage detection and localization; Machine learning; Artificial intelligence

Online: 2 July 2024 (04:07:44 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0113.v1

Geomagnetic Field Measurements based Adaptive Cubature H-infinity Filter for Microsatellite Autonomous Orbit Estimation

Zhaoming Li, Xinyan Yang, Lei Li, Yurong Liao

Subject: Engineering, Aerospace Engineering Keywords: autonomous orbit estimation; microsatellite; cubature Kalman filter; robust; geomagnetic field

Online: 1 July 2024 (13:54:09 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1487.v2

Solution of Orifice Hollow Cathode Plasma Model Equations by Means of Particle Swarm Optimization

Giovanni Coppola, Mario Panelli, Francesco Battista

Subject: Engineering, Aerospace Engineering Keywords: cathode; plasma; model; PSO ;

Online: 27 June 2024 (18:43:28 CEST)

Show abstract| Download PDF| Share

Preprint BRIEF REPORT | doi:10.20944/preprints202406.1698.v1

Overturn Dynamics of a Small Moon

Vladimir S. Aslanov

Subject: Engineering, Aerospace Engineering Keywords: small moon; gravitational torque; 180-degree rotation; control torque

Online: 24 June 2024 (18:39:35 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1279.v1

CWT-AM-CNN: A Lightweight Feature Extraction Network with Attention Mechanism Based on CWT Peak Seeking Method for Aero-Engine Hot Jet FT-IR Classification

Shuhan Du, Wei Han, Zhenping Kang, Xiangning Lu, Yurong Liao, Zhaoming Li

Subject: Engineering, Aerospace Engineering Keywords: Infrared Spectral detection; FT-IR; Aero-engine hot jet; deep learning; Attention Mechanism

Online: 20 June 2024 (12:51:20 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1416.v1

A Complex Background SAR Ship Target Detection Method Based on Fusion Tensor and Cross-Domain Adversarial Learning

Haopeng Chan, Xiaolan Qiu, Dongdong Lu, Xin Gao

Subject: Engineering, Aerospace Engineering Keywords: Synthetic Aperture Radar; target detection; Cross-Domain Adversarial Learning; Channel Fusion; Anti-Interference Heads

Online: 20 June 2024 (11:14:59 CEST)

Show abstract| Download PDF| Share

Synthetic Aperture Radar (SAR) ship target detection has been extensively researched. However, most methods use the same dataset division for both training and validation. In practical applications, it is often necessary to quickly adapt to new loads, new modes, and new data to detect targets effectively. This presents a cross-domain detection problem that requires further study. This paper proposes a method for detecting SAR ships in complex backgrounds using fusion tensor and cross-domain adversarial learning. The method is designed to address the cross-domain detection problem of SAR ships with large differences between the training and test sets. Specifically, it can be used for the cross-domain detection task from the fully-polarised medium-resolution ship dataset (source domain) to the high-resolution single-polarised dataset (target domain). This method proposes a Channel Fusion Module (CFM) based on the YOLOV5s model. The CFM utilises the correlation between polarised channel images during training to enrich the feature information of single-polarised images extracted by the model during inference. The article proposes a module called Cross-Domain Adversarial Learning Module (CALM) to reduce overfitting and achieve adaptation between domains. Additionally, the paper introduces the Anti-Interference Head (AIH) which decouples the detection head to reduce the conflict of classification and localization problems. This improves the anti-interference and generalization ability in complex backgrounds. This paper conducts cross-domain experiments using the constructed medium-resolution SAR full polarization dataset (SFPD) as the source domain and the high-resolution single-polarised ship detection dataset (HRSID) as the target domain. Compared to the best-performing YOLOV8s model among typical mainstream models, this model improves Precision by 4.9%, Recall by 3.3%, AP by 2.4%, and F1 by 3.9%. This verifies the effectiveness of the method and provides a useful reference for improving cross-domain learning and model generalization capability in the field of target detection.

Preprint ARTICLE | doi:10.20944/preprints202406.1350.v1

Advanced Scale-Propeller Design Using a MATLAB Optimization Code

Stephen D. Prior, Daniel Newman-Sanders

Subject: Engineering, Aerospace Engineering Keywords: Propeller; Small-Scale; Efficiency; Design; Optimization; MATLAB; Low Re Number.

Online: 20 June 2024 (03:31:15 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1287.v1

SE-CBAM-YOLOv7: An Improved Lightweight Attention Mechanism-Based YOLOv7 for Real-Time Detection of Small Aircraft Targets in Microsatellite Remote Sensing Imaging

Zhenping Kang, Yurong Liao, Shuhan Du, Haonan Li, Zhaoming Li

Subject: Engineering, Aerospace Engineering Keywords: aircraft detection; YOLOv7; CBAM; SENet; microsatellite

Online: 18 June 2024 (15:09:54 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1164.v1

Effect of the Wing Morphology and Structural Form on the Flexible Hovering Flapping Wing

XiaoJun Yang, Yang Luo, Wei Wang, XinYu Lang, ZhangRui Du

Subject: Engineering, Aerospace Engineering Keywords: flapping wing design; hover aerodynamics; fluid-structure interaction

Online: 18 June 2024 (12:02:26 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1039.v1

Theoretical Evaluation on Lubrication Performance of Thrust-Type Foil Bearings in Liquid Nitrogen

Hang Dou, Tao Jiang, Longgui He, Shuo Cheng, Xiaoliang Fang, Jimin Xu

Subject: Engineering, Aerospace Engineering Keywords: Thrust foil bearings; turbopump; ultralow temperature; feasibility assessment; static and dynamic characteristics

Online: 17 June 2024 (08:44:14 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1011.v1

Open-Source Database for Modeling Cislunar Debris Propagation

Marta Lopez Castro, Zachariah Hudson, David Canales

Subject: Engineering, Aerospace Engineering Keywords: spacecraft fragmentation; Cislunar region; Debris; CR3BP; space situational awareness

Online: 14 June 2024 (14:06:02 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202406.0949.v1

Implementation of ADS-B in Latin America and Its Projection

Jessica Prada, Andrés Bejarano, Pedro Melo

Subject: Engineering, Aerospace Engineering Keywords: ADS-B; ADS-B projection; ; Latin American airspace; Safety

Online: 13 June 2024 (14:25:06 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0862.v1

Propeller Effects and Elasticity in Aerodynamic Analysis of Small Propeller-Driven Aircraft

Mohsen Rostami

Subject: Engineering, Aerospace Engineering Keywords: Propeller Effects; Elasticity; Aero-structural Coupling; Aerodynamic Analysis; Small Propel-ler-Driven Aircraft; Static Aeroelasticity

Online: 12 June 2024 (17:48:53 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0622.v1

Development of Carbon Composite Blades within the Context of the Experimental Validation of a CFD-Based Design Tool for Contra-Rotating, Electric Fan Engines

Sebastian Hawner, Lukas Rduch, Henry Baumhöfener, Andreas Hupfer

Subject: Engineering, Aerospace Engineering Keywords: contra-rotating propulsor; CFD-based design tool; composite fan blades; electric fan engine

Online: 11 June 2024 (08:56:05 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202406.0586.v1

Harnessing Agricultural Waste: From Disposal Dilemma to Wealth Creation and Sustainable Solutions towards UAVsAirframe Manufacturing

Farah Syazwani Shahar, Mohamed Thariq Hameed Sultan, Andrzej Łukaszewicz, Rafał Grzejda, Zbigniew Oksiuta, Renga Rao Krishnamoorthy

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

Online: 11 June 2024 (08:49:50 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0421.v1

Damage Identification in a Helicopter Rotor Blade Root in Realistic Load Conditions With Neural Network-Based Algorithms

Pietro Ballarin, Giuseppe Sala, Marco Macchi, Irene Roda, Andrea Baldi, Alessandro Airoldi

Subject: Engineering, Aerospace Engineering Keywords: fiber bragg grating sensors; structural health monitoring; artificial neural network; composite structure; rotor blade; load monitoring

Online: 10 June 2024 (12:37:56 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0412.v1

Atmospheric Aircraft Conceptual Design Based on Multidisciplinary Optimization with Differential Evolution Algorithm and Neural Networks

Oleg Lukyanov, Van Hung Hoang, Evgenii Kurkin, Jose Gabriel Quijada-Pioquinto

Subject: Engineering, Aerospace Engineering Keywords: atmospheric aircraft; appearance; design; take-off weight; optimization; differential evolution algorithm; aerodynamics, balancing; penalty function; parallel computing

Online: 10 June 2024 (12:26:48 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0494.v1

Central Difference Variational Filtering Based on Conjugate Gradient Method for Distributed Imaging Application

Wen Ye, Fubo Zhang, Hongmei Chen

Subject: Engineering, Aerospace Engineering Keywords: Central difference Kalman filtering; Variational optimization; Conjugate gradient; Airborne distributed position and orientation system

Online: 7 June 2024 (14:37:47 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0365.v1

A Parametrical Study on Hypervelocity Impact of Orbital Debris

Ali Eken, Seher Eken

Subject: Engineering, Aerospace Engineering Keywords: Hypervelocity Impact; Orbital Debris; Material Point Method; Oblique Impact

Online: 6 June 2024 (11:41:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0202.v1

Research of Large Inflow Angles BEMT-Based Analytical-Numerical Performance Evaluation Model

Carlos Sosa Henríquez, Martynas Lendraitis

Subject: Engineering, Aerospace Engineering Keywords: BEMT; airfoil interpolation; proprotor performance; inflow angle

Online: 5 June 2024 (07:16:36 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0038.v1

Laser Machining at High ∼PW/cm2 Intensity and High Throughput

Nan Zheng, Ričardas Buividas, Hsin-Hui Huang, Dominyka Stonyte, Suresh Palanisamy, Tomas Katkus, Maciej Kretkowski, Paul R. Stoddart, Saulius Juodkazis

Subject: Engineering, Aerospace Engineering Keywords: laser machining; ultra-short laser pulses; 3D printing

Online: 3 June 2024 (08:57:36 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.2135.v1

Evaluating of Noise Reduction Techniques for Turboengine Test Stands: A Preliminary Analysis

Laurentiu Cristea, Marius Deaconu

Subject: Engineering, Aerospace Engineering Keywords: baffle attenuator; turboengine stand; experimental validation; Embleton's method; anechoic chamber; rectangular duct flow.

Online: 31 May 2024 (10:56:40 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.2095.v1

High Fidelity Numerical Characterization of NACA 23012 at Re = 300, 000 through a Discontinuous Galerkin LES Solver

Paolo Valvo, Antonella Abbà, Giuseppe Gibertini

Subject: Engineering, Aerospace Engineering Keywords: NACA 23012; LES; discontinuos Galerkin; BVI

Online: 31 May 2024 (08:48:02 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.2012.v1

System Design and Launch of Hybrid Rocket with a Star-Fractal Swirl Fuel Grain Toward an Altitude of 15 km

Atsushi Takano, Keita Yoshino, Yuki Fukushima, Ryuta Kitamura, Yuki Funami, Kenichi Takahashi, Akiyo Takahashi, Yoshihiko Kunihiro, Makoto Miyake, Takuma Masai, Shizuo Uemura

Subject: Engineering, Aerospace Engineering Keywords: hybrid rocket; system design; star fractal swirl fuel grain; ballistic launch experiment; separation nut; telemetry; data logger

Online: 30 May 2024 (08:25:05 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1903.v1

Gradient Based Aero-Stealth Optimization of a Simplified Aircraft

Charles Thoulon, Gilbert Roge, Olivier Pironneau

Subject: Engineering, Aerospace Engineering Keywords: Multidisciplinary Optimization; Shape Optimization; Gradient-Based; CAD-Based; Aerodynamics; Stealth; Radar Cross-Section

Online: 29 May 2024 (09:10:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1918.v1

Developing a Comprehensive Framework for Assessing Airport Sustainability

Diogo Ferreira, Maria Emilia Baltazar, Luis Santos

Subject: Engineering, Aerospace Engineering Keywords: Airport; Performance; Environment; Aviation; Sustainability

Online: 29 May 2024 (07:39:14 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1829.v1

Electromagnetic Characterization of EAC-1A and JSC-2A Lunar Regolith Simulants

David Ramos Somolinos, Borja Plaza Gallardo, José Cidrás Estévez, Narek Stepanyan, Aidan Cowley, Alicia Auñón Marugán, David Poyatos Martínez

Subject: Engineering, Aerospace Engineering Keywords: Regolith; electromagnetic properties; permittivity; permeability; tangent loss

Online: 28 May 2024 (12:14:42 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1816.v1

Stability of Single Channel Homing Slow-Rolling Missile

Teodor-Viorel Chelaru, Cristian Emil Constantinescu, Valentin Pană, Costin Ene, Adrian Chelaru

Subject: Engineering, Aerospace Engineering Keywords: homing missile; slow-rolling missile; single channel command missile; proportional navigation; characteristic polynomial with complex coefficients; stability criterion; mathematical model

Online: 28 May 2024 (07:14:49 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1686.v1

Structural Analysis Based on Frequency Response of a Quadrotor UAV

José de Jesús Villalobos, Edgar Rojo, Diego Ledezma, Pedro Lopez

Subject: Engineering, Aerospace Engineering Keywords: quadrotor; structural dynamics; leveled flight; resonance

Online: 27 May 2024 (07:46:58 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1581.v1

Gap Filling of Missing and Outlier Values of Rotorcraft Flight Data using Multilayer Perceptron

Seon Ho Jeong, Dongsoo Kang, Ikgyu Lee, Yongmin Lee, Jeong Ho Kim, Yun-Young Hwang

Subject: Engineering, Aerospace Engineering Keywords: rotorcraft; flight data; gap filling; multilayer perceptron; health and usage monitoring system

Online: 24 May 2024 (09:32:42 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1515.v1

Enhancing Predictive Maintenance in Airborne Weapon Systems through Advanced Frequency Augmentation Techniques

Dongsoo Kang, Seon Ho Jeong, Ikgyu Lee, Yongmin Lee, Byoungserb Shim, Yun-Young Hwang

Subject: Engineering, Aerospace Engineering Keywords: airborne weapon system; condition based maintenance; augmentation; LSTM; bidirectional LSTM

Online: 23 May 2024 (07:35:06 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1410.v1

Compound Attitude Control Strategy for Reusable Launch Vehicle Based on Improved PSO Algorithm

Shunfu Yang, Lu Gan, Tianyi Wang, Enze Zhu, Ling Yang, Hu Chen

Subject: Engineering, Aerospace Engineering Keywords: Reusable launch vehicle; Attitude control; Compound control; Fuzzy PID; Improved PSO algorithm

Online: 22 May 2024 (08:13:02 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1217.v1

Demonstration of an In-Flight Entertainment System Using Power-over-Fiber

Joao B. Rosolem, Fabio R. Bassan, Marcelo Prado de Oliveira, Alexandre Barbosa dos Santos, Leonardo Martins Wollinger

Subject: Engineering, Aerospace Engineering Keywords: power over fiber; PoF; in-flight entertainment; IFE; avionics; optical fibers; high optical power

Online: 20 May 2024 (12:37:13 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1138.v1

Process of Object-Oriented Design of Gear Size Ranges. Part II: Synthesis

Wiesław Czader, Józef Drewniak, Algazy Zhauyt, Jacek Rysiński, Kuanysh Alipbayev, Yerkin Orazaly

Subject: Engineering, Aerospace Engineering Keywords: Object oriented design; gear size ranges; phases of the object synthesis stage; concretes

Online: 17 May 2024 (04:21:50 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1103.v1

Buckling Analysis of Variable-Angle Tow composite Plates Through Variable Kinematics Hierarchical Models

Gaetano Giunta, Domenico Andrea Iannotta, Levent Kirkayak, Marco Montemurro

Subject: Engineering, Aerospace Engineering Keywords: Buckling Analysis; Finite Element Method; Variable-Angle Tow Plates; Carrera’ s Unified Formulation; Reissner’ s Mixed Variational Theorem

Online: 16 May 2024 (11:36:18 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.0929.v1

Fixed-time Consensus-based Attitude Control of Large Telescope On-orbit Construction

Peiran Li, Chongbin Guo, Zengshan Yin, Chao Chen, Ruyi Zhang

Subject: Engineering, Aerospace Engineering Keywords: attitude control; distributed control; on-orbit construction; discrete-time systems; fixed-time stability

Online: 14 May 2024 (10:45:56 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.0866.v1

Process of Object-Oriented Design of Gear Size Ranges. Part I: Analysis

Wiesław Czader, Józef Drewniak, Algazy Zhauyt, Jacek Rysiński, Kuanysh Alipbayev, Alisher Aden

Subject: Engineering, Aerospace Engineering Keywords: Object oriented design; Gear size ranges; Hierarchic; entity relationship; data-flow models

Online: 13 May 2024 (16:44:08 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.0847.v1

Multi-dimensional Ergonomic Evaluation Method for Cockpit Light Environment

Guoqing Zheng, Mingming Xu, Fengkang Xiao, Chunlian Zhan, Xiaowei Jiang

Subject: Engineering, Aerospace Engineering Keywords: ergonomics; cockpit; light environment; workload; work performance

Online: 13 May 2024 (12:27:22 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.0814.v1

Aircraft Wake Evolution Prediction Based on Parallel Hybrid Neural Network Model

Leilei Deng, Weijun Pan, Yuhao Wang, Tian Luan, Yuanfei Leng

Subject: Engineering, Aerospace Engineering Keywords: CFD; prediction of aircraft wake evolution; parallel architecture; intelligent aerodynamics; approach phase

Online: 13 May 2024 (08:30:43 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.0443.v1

An Enhanced FGI-GSRx Software-Defined Receiver for the Execution of Long Datasets

Muwahida Liaquat, M. Zahidul H. Bhuiyan, Saiful Islam, Into Pääkkönen, Sanna Kaasalainen

Subject: Engineering, Aerospace Engineering Keywords: Software-defined GNSS receiver; open-source software; parallel processing

Online: 8 May 2024 (04:01:06 CEST)

Show abstract| Download PDF| Share

The Global Navigation Satellite Systems (GNSS) software-defined receivers offer greater flexibility, cost-effectiveness, customization, and integration capabilities compared to traditional hardware-based receivers, making them essential for a wide range of applications. The continuous evolution of GNSS research and the availability of new features require these software-defined receivers to upgrade continuously to facilitate the latest requirements. The Finnish Geospatial Research Institute (FGI) has been supporting the GNSS research community with its open-source implementations, such as a MATLAB-based GNSS software-defined receiver ’FGI-GSRx’ and a Python-based implementation ’FGI-OSNMA’ for utilizing Galileo’s Open Service Navigation Message Authentication (OSNMA). In this context, longer datasets are crucial for GNSS software-defined receivers to support adaptation, optimization and facilitate testing to investigate and develop future-proof receiver capabilities. In this paper we present an updated version of FGI-GSRx, namely FGI-GSRx-v2.0.0, which is also available as an open-source resource for the research community. FGI-GSRx-v2.0.0 offers improved performance as compared to its previous version, especially for the execution of long datasets. This is carried out by optimizing the receiver’s functionality and offering a newly added parallel processing feature to ensure faster capabilities to process the raw GNSS data. This paper also presents an analysis of some key design aspects of previous and current versions of FGI-GSRx for a better insight into the receiver’s functionalities. The results show that FGI-GSRx-v2.0.0 offers about 40% run time execution improvement over FGI-GSRx-v1.0.0 in case of sequential processing mode and about 59% improvement in case of parallel processing mode with 17 GNSS satellites from GPS and Galileo. In addition, an attempt is made to execute v2.0.0 with MATLAB’s own parallel computing toolbox. A detail performance comparison reveals an improvement of about 43% in execution time over v2.0.0 parallel processing mode for the same GNSS scenario.

Preprint ARTICLE | doi:10.20944/preprints202405.0039.v1

Water Recuperation from Regolith at Martian, Lunar & Micro-gravity during Parabolic Flight

Dario Farina, Hatim Machrafi, Patrick Queeckers, Christophe Minetti, Carlo Saverio Iorio

Subject: Engineering, Aerospace Engineering Keywords: regolith hydration; water extraction technologies; parabolic flight simulation; ice-regolith interaction; substrate condensation efficiency; in-situ resource utilization (ISRU); thermal condensation processes; micro-gravity experiments; surface properties and water recovery; space resources; space mining

Online: 1 May 2024 (09:56:06 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202405.0053.v1

The U.S Air Force Next-Generation Air-Refueling System: a Resurgence of the Blended wing Body?

Guilherme Fernandes, Victor Maldonado

Subject: Engineering, Aerospace Engineering Keywords: USAF; NGAS; tanker; BWB

Online: 1 May 2024 (07:43:25 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.0050.v1

Application of a Novel WENO Scheme for RANS and RANS/LES Coupled Simulations in Turbomachinery Flows

Hao Wang, Dongdong Zhong, Shuo Zhang, Xingshuang Wu, Ning Ge

Subject: Engineering, Aerospace Engineering Keywords: WENO scheme; turbomachinery flow; NUAA-Turbo; RANS; RANS/LES coupled simulations

Online: 1 May 2024 (07:01:50 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1760.v1

Research on convective cooling and thermal protection characteristics of integrated dual-sided deflector system

Manman Zhang, Yi Jiang, Yueguang Deng

Subject: Engineering, Aerospace Engineering Keywords: launch vehicle; diversion technology; gas jet; water spray cooling; numerical simulation of flow field

Online: 26 April 2024 (12:47:59 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1745.v1

Landsat-8/9 Atmospheric Correction Reliability Using Scene-Statistics

David Groeneveld, Tim Ruggles, Bo-Cai Gao

Subject: Engineering, Aerospace Engineering Keywords: surface reflectance; retrieval; LaSRC; CMAC; scene statistics; near real-time; spectral diversity

Online: 26 April 2024 (10:57:38 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1704.v1

Vision System for the Mars Sample Return Capture, Containment and Return System (CCRS)

Brent Jon Bos, David Donovan, John Capone, Chen Wang, Terra Hardwick, Dylan Bell, Yuqing Zhu, Robert Podgurski, Bashar Rizk, Ireneusz Orlowski, Rachel Edison, David Harvey, Brianna Dizzon, Lindsay Haseltine, Kristoffer Olsen, Chad Sheng, Robert Bousquet, Luan Vo, Georgi Georgiev, Kristen Washington, Michael Singer, Stefan Ioana, Anloc Le, Elena Georgieva, Michael Hackett, Michael Ravine, Michael Caplinger, Phillip Coulter, Erin Percy, Charles Torisky, Jean Lauenstein, Kaitlyn Ryder, Michael Campola, Dillon Johnstone, William J. Thomes, Richard G. Schnurr, John McCloskey, Eugenia DeMarco, Ellen Lee, Calinda Yew, Bo Yang, Mingyu Han, Bartosz Blonski

Subject: Engineering, Aerospace Engineering Keywords: Mars; cameras; sample return; space optics

Online: 26 April 2024 (09:33:12 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1546.v1

Experimental Evaluation of Mechanical Compression Properties of Aluminum Alloy Lattice Trusses for Anti-ice System Applications

Carlo Giovanni Ferro, Sara Varetti, Paolo Maggiore

Subject: Engineering, Aerospace Engineering Keywords: Additive Manufacturing (AM); Selective Laser Sintering (SLM); Lattice Structures; Design of Experiments (DOE)

Online: 23 April 2024 (16:58:27 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1518.v1

High-Temperature Dic Deformation Measurement under High-Intensity Blackbody Radiation

Seung Min Han, Nam Seo Goo

Subject: Engineering, Aerospace Engineering Keywords: Digital image correlation; High-temperature deformation measurement; Image saturation; Speckle pattern; Heat haze effect

Online: 23 April 2024 (12:13:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1404.v1

Interlaminar Fracture Toughness Enhancement of Fine Short Fibre Z-pin Reinforced Carbon Fibre Composite

Ulf Breuer, Jonas Leon Turos, Julia Jungbluth, Mareike Schäfer, Samuel Weber

Subject: Engineering, Aerospace Engineering Keywords: Interlaminar fracture toughness; Mode II; z-pin reinforcement; through-thickness fibre; delamination; laser drilling

Online: 23 April 2024 (03:17:10 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1343.v1

Application of CVD Coatings on the Inner Surfaces of Cooled GTD Blades

Alexey Sagalovych, Vladislav Sagalovych, Viktor Popov

Subject: Engineering, Aerospace Engineering Keywords: cooled GTD turbine blades; two-component chromium-aluminum coatings; vacuum-plasma CVD coatings

Online: 22 April 2024 (08:52:04 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1284.v1

Robust Wideband Interference Suppression Method for GNSS Array Antenna Receiver via Hybrid Beamforming Technique

Zhenxing Xu, Qijia Dong, Shenyang Li, Fuzhan Yue, Meng Wang, Zhenghuan Xia, Xiao Chen, Shuangna Zhang, Guoji Zou, Huizheng Wang

Subject: Engineering, Aerospace Engineering Keywords: wideband interference; anti-jamming; hybrid beamforming; hybrid array; digital array

Online: 18 April 2024 (15:42:11 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0953.v1

Two-Stage Multi-Satellite Scheduling Algorithm Based on Task Merging Mechanism

Jing Yu, Li Ning Xing, Yan Jie Song, Zhao Hui Liu

Subject: Engineering, Aerospace Engineering Keywords: multi-satellite scheduling; task merging; mergring task scheduling; firework algorithm

Online: 15 April 2024 (10:58:41 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0830.v1

A New Type of WENO Scheme for Large Eddy Simulation of Turbomachinery Flows

Shuo Zhang, Dongdong Zhong, Hao Wang, Xingshuang Wu, Ning Ge

Subject: Engineering, Aerospace Engineering Keywords: WENO scheme; turbomachinery flow; NUAA-Turbo; large scale engineering application; LES

Online: 12 April 2024 (08:07:45 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0391.v1

A Simple Method for Identifying the Natural Frequency of a Micro Satellite with a Primary Structure made of Aluminum Alloy

Keiichi Okuyama, Keigo Yoshikawa, Chihiro Oue

Subject: Engineering, Aerospace Engineering Keywords: micro satellite; natural frequency; stiffness requirement; structure designing; structure development

Online: 5 April 2024 (08:22:01 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0329.v1

Redundant Space Manipulator Autonomous Guidance for In-Orbit Servicing via Deep Reinforcement Learning

Matteo D’Ambrosio, Lorenzo Capra, Andrea Brandonisio, Stefano Silvestrini, Michèle Roberta Lavagna

Subject: Engineering, Aerospace Engineering Keywords: Deep Reinforcement Learning; 7-DoF space manipulator; motion synchronization; In-Orbit Servicing

Online: 4 April 2024 (17:28:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0102.v1

Subgrid Turbulent Flux Models for Large Eddy Simulations of Diffusion Flames in Space Propulsion

Daniel Martinez-Sanchis, Andrej Sternin, Sagnik Banik, Oskar Haidn, Martin Tajmar

Subject: Engineering, Aerospace Engineering Keywords: Large Eddy Simulation; Turbulence; Combustion; Methane; Propulsion

Online: 1 April 2024 (15:04:25 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0057.v1

Numerical Analysis of the Influence of Typical Perturbation Forces on LEO Satellites Orbit Prediction at Different Altitudes

Yang Zhang, Shengmao He, Chao Peng, Yuchang Xu, Deyong Xian, Ran Li, Guang Yang, Hong Yuan

Subject: Engineering, Aerospace Engineering Keywords: LEO constellations; Perturbation force; Gravitational field order; orbit prediction; Atmospheric density model

Online: 1 April 2024 (13:30:31 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0020.v1

Research on Aerodynamic Characteristics and Pitch Regulated Control Strategy of Coaxilcopter with Variable Rotor Spacing

Molei Zhao, Wei Wei, Zhifang Ke, Qingkai Meng, Jinghan Tu, Yongjie Shu, Haitao Zhang

Subject: Engineering, Aerospace Engineering Keywords: coaxilcopter; variable rotor space; aerodynamic performance; rotor interaction; flight control

Online: 1 April 2024 (10:04:31 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.1861.v1

Stability Analysis and Dynamic Simulations for Gravity Gradient of a Large Rigid Space Structure

Chenglei Tang, Jialiang Sun, Dongping Jin

Subject: Engineering, Aerospace Engineering Keywords: Stability analysis; Gravity gradient; Large rigid space structure; Orbit dynamics; Natural coordinate formulation

Online: 29 March 2024 (13:45:30 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.1725.v1

Pulsed Propulsion of Unmanned Aerial Vehicles by Centrifugal Force Modulation - First-Order Theory and Practicability

Wolfgang Holzapfel Dr.

Subject: Engineering, Aerospace Engineering Keywords: unmanned aerial vehicles; vehicle propulsion; controlled unbalance propulsion; energy storage/conversion; high speed rotors; centrifugal force modulation ;

Online: 28 March 2024 (08:31:42 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.1444.v1

Environmental Chamber Characterization of an Ice Detection Sensor for Aviation Using Graphene and PEDOT:PSS

Dario Farina, Marco Mazio, Hatim Machrafi, Patrick Queeckers, Carlo Saverio Iorio

Subject: Engineering, Aerospace Engineering Keywords: Ice Formation; Aircraft Ice Detection; Hazard Management; Graphene Sensors; In-Flight Safety Technology; Real-time Ice Monitoring; Resistance Signal Analysis; Pedot:PSS; Climatic chamber

Online: 25 March 2024 (08:47:38 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.1429.v1

Shock Wave and Aeroelastic Coupling in Overexpanded Nozzle

Haifeng Hu, Xinni Gao, YuShan Gao, Jianwen Yang

Subject: Engineering, Aerospace Engineering Keywords: shock wave; side load; Aeroelastic; CFD/CSD

Online: 25 March 2024 (06:25:09 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202402.0747.v2

Validation of a Mid-fidelity Numerical Approach for Wind Turbine Aerodynamics Characterization

Alberto Savino, Andrea Ferreri, Alex Zanotti

Subject: Engineering, Aerospace Engineering Keywords: Wind Turbine; Aerodynamics; Vortex Particle Method; Computational Fluid Dynamics

Online: 21 March 2024 (04:19:31 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.1160.v1

A Novel Preparation Method of Composite Bolted T-joint with High Bending Performance Based on Prepreg-RTM Co-Curing Process

Tao Zhang, Zhitao Luo, Jinxin Deng, Xiaoquan Cheng

Subject: Engineering, Aerospace Engineering Keywords: polymer composite, T-joint, preparation method, prepreg-RTM co-curing process, bending performance

Online: 19 March 2024 (14:43:03 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.0896.v2

A Comprehensive Dataset of the Aerodynamic and Geometric Coefficients of Airfoils in the Public Domain

Kanak Agarwal, Vedant Vijaykrishnan, Dyutit Mohanty, Manikandan Murugaiah

Subject: Engineering, Aerospace Engineering Keywords: Airfoil; Computational Fluid Dynamics (CFD); OpenFOAM; Class Shape Transformation (CST); Dataset; Aerodynamic Coefficients; Geometric Coefficients; Aerodynamics

Online: 19 March 2024 (01:27:39 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.1021.v1

Introduction of a Novel Structure for Light Unmanned Balloon’s Payload: A Comprehensive Hybrid Study

Norbert Hegyi, Gusztáv Fekete, János Jósvai

Subject: Engineering, Aerospace Engineering Keywords: novel payload structure; dodecahedron; PLA; low air pressure test; drop test; flight test

Online: 18 March 2024 (10:44:18 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.0890.v1

Heat Load Development and Heat Map Sensitivity Analysis for Civil Aero-Engines

Alireza Ebrahimi, Soheil Jafari, Theoklis Nikolaidis

Subject: Engineering, Aerospace Engineering Keywords: Thermal Management System; Heat Loads; Aero Engines

Online: 15 March 2024 (08:55:38 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.0406.v1

Hexa-Propeller Airship for Environmental Surveillance and Monitoring in Amazon Rainforest

José Raul Azinheira, Reginaldo Hughes Carvalho, Ely Carneiro de Paiva, Rafael de Angelis Cordeiro

Subject: Engineering, Aerospace Engineering Keywords: Airship; Unmanned Aerial Vehicles; Autonomous Control System; Environmental Monitoring; Robotic Vehicles

Online: 7 March 2024 (08:20:19 CET)

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

Search Results

259 articles found