Bourgenot, C.; Krumins, V.; Bramall, D.G.; Haque, A.M. Topology Optimization of a Single-Point Diamond-Turning Fixture for a Deployable Primary Mirror Telescope. Aerospace2024, 11, 50.
Bourgenot, C.; Krumins, V.; Bramall, D.G.; Haque, A.M. Topology Optimization of a Single-Point Diamond-Turning Fixture for a Deployable Primary Mirror Telescope. Aerospace 2024, 11, 50.
Bourgenot, C.; Krumins, V.; Bramall, D.G.; Haque, A.M. Topology Optimization of a Single-Point Diamond-Turning Fixture for a Deployable Primary Mirror Telescope. Aerospace2024, 11, 50.
Bourgenot, C.; Krumins, V.; Bramall, D.G.; Haque, A.M. Topology Optimization of a Single-Point Diamond-Turning Fixture for a Deployable Primary Mirror Telescope. Aerospace 2024, 11, 50.
Abstract
CubeSats, known for their compact size and cost-effectiveness, have gained significant popularity. However, their limited size imposes restrictions on optical aperture and, consequently, Ground Resolution Distance in Earth Observation missions. To overcome this limitation, the concept of deployable optical payloads with segmented primary mirrors which can unfold like petals has emerged, enabling larger synthetic apertures and enhanced spatial resolution. This study explores the potential benefits of leveraging Additive Manufacturing (AM) and Topology Optimization (TO) in the realm of ultra-precision machining, specifically single point diamond machining. The goal is to reduce fixture weight while improving stiffness to minimize deformations caused by rotational and cutting forces which compromise optical performance. Through Finite Element Analysis, this research compares conventionally machined fixtures with those produced using AM and TO techniques. The results reveal that concept designs created through TO can achieve a remarkable 68% reduction in weight. This reduction makes the assembly, including the machining fixture and 12U deployable segments, manageable by a single operator without the need for specialized lifting equipment. Moreover, these innovative designs lead to substantial reductions of up to 86% and 51% in deformation induced by rotational and cutting forces, respectively.
Keywords
Topology Optimization; Single Point Diamond Machining; Deployable Optics; Additive Manufacturing; CubeSat; Lightweight; Earth Observation
Subject
Engineering, Mechanical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
