对并联可修复系统可用性相关指标的综合分析

分析了并联可修复系统的特点以及不同维修策略对系统可用性的影响,建立了并联系统工作模式和各类故障的仿真模型,编制了两单元并联系统工作和故障仿真程序;在此基础上,通过反复运行程序推测出系统修复率指标的计算公式,通过分析其物理含义,在理论上确认了其正确性;并通过理论分析和系统典型运行情况得出系统可用度模型成立的条件,通过已有的关系式推导出其它系统指标;再用同等条件的其它参数运行程序,验证了这些公式的计算结果.采用所得模型对相关问题进行了扩展分析,得出了符合实际、具有启发性的分析结论.

An Integrated Analysis to Availability and Related Performances of Parallel Maintainable System

The characteristics of parallel maintainable system are analyzed and the influences of different maintain policies to the system are discussed.Work modes and simulation models about various failures are presented.A computer program is designed to simulate failure's modes of the parallel system with two units.On the basis,a formula of maintain ratio of parallel system is considered through a great deal of program's calculation.Through the analysis of physical meaning,the formula is validated by theory analysis.The conditions about availability equation of the system are given by theory analysis and modules of system operation.Then the system's other performances can be got by current equations. All the calculation outputs from the formulas can be compared with and validated through computer simulation with different inputs.The models have been used to analyze related problems,meaningful and practical results have been got from it.