船舶电气多状态并联冗余系统可靠性分析与优化  

Analysis and Optimization of Reliability of Multi-state Marine Electrical Parallel-redundant System

作　　者：吴志良[1] 姚玉斌[1] 王丹[1] 

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026

出　　处：《船舶工程》2016年第S2期219-222,共4页Ship Engineering

基　　金：国家自然科学基金资助项目(61273137)

摘　　要：针对船舶电气系统常见的并联冗余设计,与传统的二状态可靠性分析方法不同,应用多状态可靠性理论,建立了船舶电气多状态并联冗余系统的可靠度数学模型,并进行了优化设计。实例给出了常见的三状态船舶电气并联冗余系统的可靠度表达式,证明由于短路失效的存在,即使采用更多的并联冗余支路组成的三状态船舶电气并联冗余系统,也不能有效地提高系统的可靠度。相反,过多并联支路反而会使并联冗余系统可靠度下降。与二状态不同,三状态船舶电气并联冗余系统常用的继电器辅助触点多支路冗余设计,最优冗余数仅为2。研究结果不仅适用船舶电气并联冗余系统,也适用于一般三状态并联冗余系统,具有普遍性。The methods of reliability analysis for parallel-redundant system are different from the traditional two-state system,according to multi-state reliability theory,the design of the multi-state electrical parallel-redundant system was optimized,and a mathematical model of the reliable degree for the system was built.The formula of reliable degree was given by an example with usual three-state marine electrical parallel-redundant system.Researches indicated that it couldn't increase the reliability of the system even adopting the three-state marine electrical parallel-redundant system with more parallel-redundant branches because of the existence of short circuit failure.On the contrary,it would decrease the reliable degree of system with excessive branches.It differs from two-state system that the optimal redundancy is only 2 for the multi-branch redundancy design with auxiliary contacts of relay which often used in three-state marine electrical parallel-redundant system.The research results have universality,they are appropriate for marine electrical parallel-redundant system and the general three-state parallel-redundant system.

关 键 词：多状态 冗余 并联 可靠性 船舶电气系统 

分 类 号：U665[交通运输工程—船舶及航道工程]