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目的对含有功能相关性和负载相关性部件的航天飞行训练模拟器接口系统进行可靠性分析。方法通过构建马尔科夫模型,求解状态方程的方法分析动态子树;以故障树分析法(fault tree analysis,FTA)对整个系统进行可靠性分析。结果从模拟器接口系统可靠性模型可计算出工作1200 h后,接口系统故障概率为23.44%,而基于传统的串并联模型计算出故障概率仅为21.80%。结论在状态相关系统中,构建动态子树并以马尔科夫方法求解是一种有效的方法。相比一般的串并联模型,其可靠性分析结果可信度更高;进而在激发事件等关键环节采取冗余设计,可大幅降低系统的故障概率。
OBJECTIVE To analyze the reliability of the space flight training simulator interface system with function-dependent and load-related components. Methods The dynamic sub-tree was constructed by constructing the Markov model and solving the equation of state. The reliability of the whole system was analyzed by fault tree analysis (FTA). Results According to the system reliability model of simulator interface, the failure probability of interface system can be calculated to be 23.44% after 1200 h of operation, while the failure probability calculated based on the traditional series-parallel model is only 21.80%. Conclusion In state-related systems, it is an effective way to construct dynamic sub-tree and solve it by Markov method. Compared with the common serial-parallel model, the reliability analysis result is more credible. In addition, the redundant design in the key links such as excitation events can greatly reduce the probability of system failure.