多失效模式光电系统可靠性建模分析方法

Reliability modeling and analysis method for electro-optical system with multiple failure modes

系统可靠性建模分析是开展可靠性分配、预计、故障树分析及可靠性优化设计的基础。介绍了一种光电系统可靠性建模分析方法,针对光电系统中部分分系统具有多种失效模式且各失效模式均服从指数分布的特点,依据齐次马尔科夫理论,采用马尔科夫状态转移图方法建立了产品的可靠性模型,并给出解析表达式、数值计算方法和Monte Carlo仿真方法。最后,将其应用于某机载光电系统供电回路的实例分析中。采用两种计算方法及Monte Carlo仿真方法分别进行计算,并将结果进行对比分析,证明了该方法的正确性及可行性。

The system reliability modeling and analysis is the basis of reliability allocation and prediction,fault tree analysis and reliability optimization design.A reliability modeling and analysis method for electro-optical system was introduced.For some subsystems with multiple failure modes following exponential distribution,according to the homogeneous Markov stochastic process theory,a reliability model was built using the Markov state transition diagram method.Then the analytical expression,numerical calculation method and Monte Carlo simulation method were presented.The reliability model was applied to an example analysis for power supply circuit of an airborne electro-optical system.The above methods were used to calculate,and the results were compared and analyzed,which verifies the correctness and feasibility of the proposed method.