单步和多步寻优结合的诊断策略构建方法  

Diagnostic Strategy Construction Method Combining One-Step and Multi-Step Optimization

作　　者：杜小帅 胡冰[1] 施端阳 张馨予 DU Xiao-shuai;HU Bing;SHI Duan-yang;ZHANG Xin-yu(Air Force Early Warning Academy,Hubei Wuhan 430010,China;PLA,No.94005 Troop,Gansu Jiuquan 735000,China)

机构地区：[1]空军预警学院,湖北武汉430010 [2]中国人民解放军94005部队,甘肃酒泉735000

出　　处：《现代防御技术》2022年第2期96-103,共8页Modern Defence Technology

基　　金：全军军事类研究生资助课题(JY2020C236)。

摘　　要：为避免AO^(*)算法及Rollout算法的回溯操作,同时克服信息熵算法最优性较差的问题,达到以较低测试费用对装备进行故障检测和隔离的目的,提出了一种单步和多步寻优结合的诊断策略构建方法。该方法以诊断策略构建与无噪声编码的相似性为依据,根据故障状态模糊集中的概率分布情况选择单步或多步寻优搜索方法。提出在故障状态模糊集中概率最大的故障满足一定条件时,优先对其进行隔离,并生成相应的测试序列,使先验概率较大的故障具有较少的测试步骤和费用,从而达到降低整体诊断费用的目的。通过实例分析验证,给出了诊断策略构建的具体过程,证明了方法的有效性。In order to avoid the backtracking operation of AO^(*)algorithm and Rollout algorithm,and to overcome the problem of poor optimality of information entropy algorithm,and achieve the purpose of fault detection and isolation of equipment with low test cost,a diagnostic strategy construction method combining one-step and multi-step optimization is proposed.Based on the similarity between diagnostic strategy construction and noiseless coding,a one-step or multi-step optimal search method is selected according to the probability distribution of the fault state fuzzy set.When the fault with the highest probability in the fuzzy set of fault states meets certain conditions,it is prioritized for isolation and the corresponding test sequence is generated so that the fault with higher priori probability has less test steps and costs,so as to reduce the overall cost of diagnosis.Through the analysis and verification of examples,the concrete process of constructing the diagnostic strategy is given,and the effectiveness of the method is proved.

关 键 词：测试性 诊断策略 测试序列 故障诊断 测试费用 

分 类 号：E92[军事—军事装备学] TP206[兵器科学与技术—武器系统与运用工程]