针对具有多故障状态的航天飞机轨道机动系统的工作模式,建立了可重构的双重系统模型。应用马尔可夫相关知识研究了该系统的可靠性与安全性问题,给出了此类具有多故障状态系统的故障前平均时间(MTTF)、进入危险性故障状态的累积平均时间(CMTTF|D)的计算方法,根据该计算结果调整相应的参数可以有效地提高航天飞机轨道机动系统的可靠性。
According to the work mode of Space Shuttle Orbit Maneuver System (OMS) which has multi-failure states, a reconfigurable duplex model is presented and analyzed the reliability and safety of OMS are analysed based on the theory of Markov Chain. Indexes of reliability and safety : MTTF, CMTTF | D and theirs computations are given, whose results could greatly improve the reliability of OMS based on adjusting the corresponding indexes.