并联电子系统级联失效可靠性分析与维护策略  

Reliability and Maintenance Policy of Parallel Electric System Based on Cascading Failure

作　　者：张鼎周[1] 章根耀[1] 钱存华[2] 

机构地区：[1]中国电子科技集团公司第二十八研究所,江苏南京210007 [2]南京工业大学管理科学与工程学院,江苏南京210009

出　　处：《电子产品可靠性与环境试验》2009年第2期10-13,共4页Electronic Product Reliability and Environmental Testing

基　　金：国家自然科学基金项目(74141017)资助

摘　　要：与各部件失效相互独立的并联系统相比,级联失效这一因素显著降低了系统的可靠性。运用更新过程和马尔可夫理论,分析了存在级联失效关系的两同型部件并联系统的可靠性。为了有效地应对级联失效对并联电子设备系统的影响,引入了预防维护策略,并且建立了期望费用率模型,得到了使期望费用率最小的维护策略,最后给出了算例。While the component failures are independent from each other in a parallel system, the factor of cascading failure could significantly reduce the reliability of the parallel system. The reliability of two-identical-units parallel system with cascading failure was analyzed using the theory of the renewal process and Markov process. A preventive maintenance policy was introduced to reduce the impact of cascading failure. An expected cost model was developed and the optimal maintenance policy was derived to minimize the expected cost. Finally, a numerical example for the model was presented.

关 键 词：级联失效 并联系统 可靠性 维护策略 

分 类 号：O213.2[理学—概率论与数理统计]