直流配电盒的可靠性设计与分析

直流配电盒作为配电系统的核心，要求具有较高的可靠性。该文对基于CAN/LIN总线直流配电盒系统的容错设计和具体实现方案进行论述。通过运用马尔可夫随机过程理论和拉普拉斯变换工具，对直流配电盒的失效-修复这一随机过程进行可靠性分析，确定各个部件以及整个系统的可用度、可靠度和平均无故障工作时间。在可靠性分析的基础上，采用Matlab/Simulink对直流配电盒进行仿真，能够比较准确地反映暂态过程中直流配电盒系统的动态特性，直观地体现系统的性能。

Reliability Design and Analysis of DC Power Distribution Box

The DC power distribution box, as the key part of power distribution system, demands high reliability. This paper presents the fault-tolerant design and the implementation of the DC power distribution box based on CAN/LIN bus. It also analyzes the reliability of failure-repair stochastic processes. By using the Markovian process theory and the tool of the Laplace transform, some reliability indexes of the system are obtained, such as the availability, the reliability and the mean time between failures of components and the whole system. On the basis of the mathematical analysis, the model is simulated in Matlab/Simulink environment. The simulation results indicate that the power distribution system has good dynamic performance.