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中文摘要：
针对复杂系统可靠性评价中工作环境可变的情形,提出基于云模型和混合Petri网相结合的可靠性评价方法。首先采用云模型描述系统的环境适应能力指数,并将其作为混合Petri模型中连续库所的托肯值来控制该模型中变迁的变迁率,然后采用基于Petri网的蒙特卡罗方法对不同环境下的系统可靠性进行仿真求解,得到系统在不同时刻下的失效率。最后以一个C4ISR系统为例,验证了该方法在解决可变工作环境下的系统可靠性评估是可行的。
英文摘要：
Aiming at the variable environment in reliability assessment for complex systems,an assessment method of system reliability based on cloud model and hybrid stochastic Petri net is proposed.Firstly,cloud model is applied to describe the index of suitability for working conditions,which is used to control the rate of dscrete transitions.Then Monte-Carlo Method based on Petri net is used to obtain simulation simulation solution of system reliability in different environment,and the failure raets for real time are gained.Finally,a C4ISR system illuminates the feasibility of this method.
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