Modular design and structural optimization of CubeSat separation mechanism

IF 3.1 2区物理与天体物理 Q1 ENGINEERING, AEROSPACE

Acta Astronautica Pub Date : 2024-09-30 DOI:10.1016/j.actaastro.2024.09.067

Jiaolong Zhang , Jingao Su , Chao Wang , Yiqian Sun

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引用次数: 0

Abstract

In order to achieve the design requirements of light weight and high stiffness of the CubeSat modular separation mechanism, a BPNN-GA-PSO size optimization method is proposed to optimize the design of the separation mechanism. Firstly, the separation mechanism of modularization and standardization is analyzed to select the optimization objects. Then, a hierarchical optimization strategy of topology optimization followed by size optimization is adopted to find the global optimum using a hybrid GA-PSO optimization algorithm. Meanwhile, the BPNN surrogate model is introduced to improve the optimization efficiency. The results show that the mass proportion of the optimized separation mechanism is reduced to 18 %, and the maximum deformation of the separation mechanism is 0.123 mm, which meets the design requirements of light weight and high stiffness of the separation mechanism. It proves the applicability of the optimization method to the optimal design of the separation mechanism. The CubeSat modular separation mechanism designed in this paper has been verified by ground verification with overload, vibration, and shock mechanical tests, and successfully deployed the BY-03 satellite in-orbit, which can provide reference for the design and development of subsequent CubeSat modular separation mechanisms.

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立方体卫星分离机构的模块化设计和结构优化

为了实现立方体卫星模块化分离机构轻量化、高刚度的设计要求，提出了一种BPNN-GA-PSO尺寸优化方法来优化分离机构的设计。首先，分析模块化和标准化的分离机构，选择优化对象。然后，采用先拓扑优化后规模优化的分层优化策略，利用混合 GA-PSO 优化算法找到全局最优。同时，引入 BPNN 代理模型来提高优化效率。结果表明，优化后分离机构的质量比例降低到 18%，分离机构的最大变形量为 0.123 mm，满足了分离机构轻质高刚度的设计要求。这证明优化方法适用于分离机构的优化设计。本文设计的立方体卫星模块化分离机构经过过载、振动和冲击力学试验的地面验证，并成功将BY-03卫星部署在轨，可为后续立方体卫星模块化分离机构的设计和开发提供参考。

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来源期刊

Acta Astronautica 工程技术-工程：宇航

CiteScore

7.20

自引率

22.90%

发文量

599

审稿时长

53 days

期刊介绍： Acta Astronautica is sponsored by the International Academy of Astronautics. Content is based on original contributions in all fields of basic, engineering, life and social space sciences and of space technology related to: The peaceful scientific exploration of space, Its exploitation for human welfare and progress, Conception, design, development and operation of space-borne and Earth-based systems, In addition to regular issues, the journal publishes selected proceedings of the annual International Astronautical Congress (IAC), transactions of the IAA and special issues on topics of current interest, such as microgravity, space station technology, geostationary orbits, and space economics. Other subject areas include satellite technology, space transportation and communications, space energy, power and propulsion, astrodynamics, extraterrestrial intelligence and Earth observations.