反馈回路系统诊断策略优化技术研究

针对复杂反馈回路系统的故障诊断问题,提出了一种诊断策略自适应优化生成方法.首先对已有的回路搜索算法进行改进,提出了一种可以快速搜索系统全部反馈回路的算法,然后针对不同情形提出了3种中断回路的策略,在此基础上,提出了诊断策略优化生成算法.该算法以信息增益作为测试排序的启发函数,通过迭代计算得到近似最优的诊断策略.最后给出了主要步骤,并通过实例进行了验证.计算结果表明,该方法可以有效解决复杂反馈回路系统的故障诊断问题.

Diagnostic Strategy Optimization of Feedback Loop System

An optimization method was put forward to adaptively generate diagnostic strategies of complex feedback loop systems. Firstly, the exsiting cycle searching algorithms were improved to beamore effici ent algorithm that could find all feedback loops faster. Secondly, three breaking strategies at different situations were presented. After that,anal gorithm to generate efficient diagnostic strategies was presented. This algorith memployed the information gain as the heuristic function of test sequencing and achieved a nearly optimal diagnositc strategy by interative computation. Finally, the main steps of the method were provided, and the method was validated byan example. The experimental results show that the presented method efficientlys olves the diagnostic problem of feedback loop systems.