| Citation: | LI Y，ZHANG X X，SUN F Q，et al. Belief reliability modeling for assembly accuracy of spaceborne SAR antenna deployable mechanism[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（1）：134-143 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0234
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The deployable mechanism for a spaceborne synthetic aperture radar (SAR) antenna is a space truss structure, with the rod system and hinge coupled in space. Assembling accuracy is difficult to control precisely during the assembly process, and assembly reliability directly impacts the spaceborne SAR antenna’s service performance. Therefore, based on the principle of reliability science, a precision assurance reliability modeling method for spaceborne SAR antenna ground assembly is proposed in this paper. First, the performance index and threshold indicating the assembly accuracy of the antenna deployable mechanism were established, taking into account both internal and external elements that have an impact on the assembly accuracy in the antenna assembly process. Then, the multi-source uncertainty analysis and quantification were carried out to construct the assembly precision certainty reliability model of the spaceborne SAR antenna deployable mechanism. Finally, the reliability sensitivity analysis and verification of a spaceborne SAR antenna deployable mechanism are carried out. The results show that the proposed method can provide theoretical guidance for the mounting and adjusting of spaceborne SAR antenna deployable mechanism, and effectively improve the assembly accuracy and efficiency.
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