有优先权且有两不同修理设备的两部件冷贮备可修系统的可靠性分析

在开关不完全可靠的情况下,研究了两个不同型部件和两个修理设备组成的冷贮备系统.在部件1有工作和修理优先权的条件下,建立了在部件和开关工作寿命及修理时间均服从指数分布的可修系统模型,利用Markov理论和Laplace变换,给出了系统可靠度的Laplace表达式及系统的稳态指标.     

可修不同部件n中取r至s系统的可靠性分析

本文对可修不同部件ｎ中取ｒ至ｓ系统进行了可靠性分析，这是一类典型的非单调关联系统。研究了该系统的工作条件和故障模式，并针对简单情形得到了此类可修系统的工作状态空间，给出了系统可靠度和系统首次故障前的平均时间ＭＴＴＦＦ的Ｌａｐｌａｃｅ变换表达式。     

开关寿命连续型冷贮备可修系统的可靠性分析：两不同部件构成的可修系统

本对由两个不同部件组成的,而且开关寿命为连续随机变量的冷贮备可修系统作了研究,建立了该类系统的一般模型,给出了系统可靠度R(t）的L-变换和首次故障前的平均时间的结果。     

Reliability analysis of 1-for-2 shared protection systems with general repair-time distributions

In this paper, we investigate the reliability of a type of 1-for-2 shared protection systems. The 1-for-2 shared protection system is the most basic fault-tolerant configuration with shared backup units. We assume that there are two working units each serving a single user and one shared protection (spare) unit in the system. We also assume that the times to failure and to repair are subject to exponential and general distributions respectively. Under these assumptions, we derive the Laplace transform of the survival function (the cdf that the system will survive beyond a given time) for each user as well as the user-perceived Mean Time to First Failure (MTTFF) by combining the state transition analysis and the supplementary variable method. We also show the effect of the repair-time distribution, the failure rates and the repair rates of the units through the case study of small-sized two enterprises that share one spare device for backup purpose. The analysis reveals what is important and what should be done in order to improve the user-perceived reliability of shared protection systems.