Useful life prediction using a stochastic hybrid automata model for an ACS multi-gyro subsystem  

作　　者：CHENG Yuehua JIANG Liang JIANG Bin LU Ningyun 

机构地区：[1]College of Astronautics Engineering, Nanjing University of Aeronautics and Astronautics [2]College of Automation Engineering, Nanjing University of Aeronautics and Astronautics

出　　处：《Journal of Systems Engineering and Electronics》2019年第1期154-166,共13页系统工程与电子技术（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities(2016083)

摘　　要：A useful life prediction method based on the integration of the stochastic hybrid automata(SHA) model and the frame of the dynamic fault tree(DFT) is proposed. The SHA model can incorporate the orbit environment, work modes, system configuration, dynamic probabilities and degeneration of components,as well as spacecraft dynamics and kinematics. By introducing the frame of DFT, the system is classified into several layers, and the problem of state combination explosion is artfully overcome.An improved dynamic reliability model(DRM) based on the Nelson hypothesis is investigated to improve the defect of cumulative failure probability(CFP), which is used to address the failure probability of components in the SHA model. The simulation using the Monte-Carlo method is finally conducted on two satellites, which are deployed with the same multi-gyro subsystem but run on different orbits. The results show that the predicted useful life of the attitude control system(ACS) with consideration of abrupt failure,degradation, and running environment is quite different between the two satellites.A useful life prediction method based on the integration of the stochastic hybrid automata(SHA) model and the frame of the dynamic fault tree(DFT) is proposed. The SHA model can incorporate the orbit environment, work modes, system configuration, dynamic probabilities and degeneration of components,as well as spacecraft dynamics and kinematics. By introducing the frame of DFT, the system is classified into several layers, and the problem of state combination explosion is artfully overcome.An improved dynamic reliability model(DRM) based on the Nelson hypothesis is investigated to improve the defect of cumulative failure probability(CFP), which is used to address the failure probability of components in the SHA model. The simulation using the Monte-Carlo method is finally conducted on two satellites, which are deployed with the same multi-gyro subsystem but run on different orbits. The results show that the predicted useful life of the attitude control system(ACS) with consideration of abrupt failure,degradation, and running environment is quite different between the two satellites.

关 键 词：useful life prediction STOCHASTIC hybrid AUTOMATA (SHA) multi-gyro SUBSYSTEM DYNAMIC fault tree (DFT) DYNAMIC reliability. 

分 类 号：N[自然科学总论]