基于T-S模糊故障树的多态导航系统性能可靠性

考虑复杂多态导航系统在不同故障状态具有不同的性能可靠性，将T-S模糊故障树模型应用到多态导航系统性能分析中，以T-S模糊故障树表示系统的性能变量，映射为系统性能指标值，结合统计学中的期望思想，计算不同层次事件发生故障时系统的性能可靠性，并以典型的全球定位系统(GPS)和惯性定向定位导航系统(INS)相组合的导航系统进行分析建树，求解系统在多故障状态下的性能可靠性指标，并进行了实例分析。结果表明:无论底事件处于轻微还是严重故障状态，对系统性能都会产生影响，中间事件是导航系统的薄弱环节，即便是中间层轻微故障，也会引起系统性能可靠性较大的下降。 

Performance reliability of multi-state navigation system based on T-S fuzzy fault tree

The T-S fuzzy fault tree model is applied to the performance analysis of the multi-state navigation system, considering that complex multi-state system has different performance reliability in different fault states. The T-S fuzzy fault tree is used to represent the performance variables of the system and mapped to the performance index of the multi-state system. Combined with the expectation idea of statistics, the performance reliability of the system is calculated when the system is at different levels of failure event. The navigation system, combined with the typical Global Positioning System (GPS) and the Inertial Navigation System(INS), is used to analyze and build the tree to solve the problem of the system in the multi-fault state. The performance reliability index of the system is analyzed by making an example analysis. The results show that no matter whether the bottom event is in a minor or severe failure state, it will affect the system performance. The intermediate event is a weak link in the navigation system. Even a slight failure in the middle layer will cause a significant decrease in system performance reliability.