考虑Poisson冲击的多阶段任务系统可靠性分析

Reliability Analysis of Phased-mission Systems Exposed to Poisson Shocks

本文探讨了受Poisson冲击作用下的多阶段任务系统可靠性问题。假定系统元件服从非指数分布,冲击服从齐次Poisson过程,应用半马尔科夫过程理论对子系统进行状态概率分析,结合随机过程理论和近似积分计算方法得到了冲击影响下动态子系统中电子元件失效分布函数。然后,基于模块化的方法利用阶段任务二值决策图技术实现了对多阶段任务动态复杂系统的可靠性评估。最后,分析了一个工程实际案例,对提出的模型和方法进行了验证。

In this paper,the reliability analysis problem for phased-mission systems exposed to random shocks is studied.It is assumed that the components of the system are followed non-exponential distribution,the random shocks are modeled by the homogeneous Poisson process,the state probability of each subsystem is analyzed by using Semi-Markov process theory,and the failure distribution function of the electronic component within the dynamic subsystems subject to Poisson shocks is obtained by combining the stochastic process theory and approximate integral calculation methods.Then,based on the modular approach,the reliability evaluation of the phased-mission dynamic complex systems is achieved using the phased-mission binary decision diagram technique.Lastly,a numerical example is provided to illustrate the proposed model and method.