应用故障模式规避提高卫星运行可靠性方法研究

可靠性指系统在各种可能条件下正常运行的能力,系统可靠性是系统工程研究的重要内容．卫星及其运行环境的特殊性导致其运行可靠性研究难以应用可靠性工程通常使用的概率和统计学方法．通过研究应用故障模式规避(FMA)方法提高卫星运行可靠性,识别了单边和双边故障模式,定义了故障模式及其规避过程的数学表述,提出了用于故障模式规避的扩充非关联控制因素约束边际区间、自主选择故障模式状态空间、故障模式状态空间预测、故障模式隔离和关联控制因素与故障模式策略,给出了相应的案例．

Research on Method to Improving Reliability of In-Orbit Satellite by Failure Mode Avoidance

Reliability is one of the most important topics researched in Systems Engineering. Due to the peculiarity of satellites and their operating environment, it is hard to use probability or statistic methods for the study of reliability engineering of satellites. To find reasonable methods to improve reliability of satellites is essential in aerospace applications. There are several kinds of method to improve reliability of satellites, robust parameter design and operating windows methods are two of them. One of a new method for improving in-orbit satellites' reliability, Fault Mode Avoidance (FMA), is proposed and applied to improve reliability of satellites in this paper. One-Side and Two-Side failure modes of satellites, such as prediction of status space of failure mode, separation of failure mode, etc., are identified, and mathematic definitions and avoidance procedures of the failure modes are given. Several failure-mode-avoidance strategies are designed, and relative cases of the strategies are also shown.