| Citation: | FENG Jianguang, ZHENG Zixia, LONG Dongteng, et al. Method for predicting on-orbit residual life of satellite atomic clock[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(11): 2215-2221. doi: 10.13700/j.bh.1001-5965.2021.0087(in Chinese)
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An atomic clock is one of the most critical loads of a navigation satellite. It is thus of great significance to carry out the work related to the health assessment and residual life prediction of atomic clocks to understand the performance and the health status of the atomic clock in time and to ensure that the satellite navigation system provides services with high availability and continuity. Based on the analysis of on-orbit failure characteristics of the atomic clock, a method for residual life prediction of the satellite atomic clock is presented in this paper. The method considers the random failure and the loss failure of the atomic clock comprehensively based on the multi-dimensional data generated in the life cycle of the atomic clock, and predicts residual life by means of probability statistics and machine learning. Case studies show that the method proposed is reasonable, effective, and applicable to engineering practices.
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