| Citation: | HE T Y，DONG Y，WANG H，et al. Design and optimization of modular parabolic deployable mechanism[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（9）：2473-2481 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0652
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As an important functional component of a satellite, a parabolic antenna is a basis for realizing remote sensing measurement and wireless communication. In order to solve the difficulty of configuration design and stiffness matching of modular parabolic antenna deployable mechanism, a configuration method of rib element deployable mechanism based on scissors mechanism is proposed, and the rib element deployable mechanism is designed. Through kinematic analysis, it is verified that the same deployable mechanism can envelope different paraboloid-fitted spheres through the modification of parameters. The configuration of kinematic pairs of rotatable rib parts is based on a concept for solving the unfolding process of the multi-module deployable mechanism by the envelope cone approach.The configuration parameters of the rib element deployable mechanism are improved to increase natural frequency and decrease overall quality, and the finite element model of the multi-module deployable mechanism is built. The non-inferior sorting genetic algorithm is used to complete the optimization iterative calculation, and the design parameters of deployable mechanisms with high structural stiffness and lightweight are obtained. Under the same conditions, the harmonic average natural frequency is increased by 67.4%, and the overall quality of the antenna is reduced by 35.2% after optimization.
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