基于改进的冲突A*算法的卫星电源系统故障诊断方法研究  

Research on Fault Diagnosis Method of Satellite Power System Based on Improved Conflict A* Algorithm

作　　者：王毅恒 李俊麟 张伟[2,3] WANG Yiheng;LI Junlin;ZHANG Wei(College of Information Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China;State Key Lab.of Robotics,Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China;Institutes for Robotics and Intelligent Manufacturing,Chinese Academy of Sciences,Shenyang 110169,China)

机构地区：[1]沈阳化工大学信息工程学院,沈阳110142 [2]中国科学院沈阳自动化研究所机器人学国家重点实验室,沈阳110016 [3]中国科学院机器人与智能制造创新研究院,沈阳110169

出　　处：《计算机测量与控制》2023年第8期10-15,共6页Computer Measurement &Control

基　　金：中国科学院空间科学战略性先导科技专项资助项目(XDA1502030505)。

摘　　要：针对卫星电源系统的在轨故障诊断,提出了一种改进的冲突A*算法故障诊断方法;改进的冲突A*算法在冲突A*算法基础上,增添了一个扩展节点消减模块,通过该模块可以达到故障隔离的目的,从而加快搜索速度;首先改进的冲突A*算法会生成一个候选诊断,然后,在卫星电源系统模型中对应部件生成输出,当模型部件生成的输出与实际观测值不一致时,改进的冲突A*算法会缩减可扩展的冲突节点,然后生成下一个候选诊断并进行循环,直到搜索结束;采用多组件受约束卫星电源系统模型开展验证实验,结果显示,多重故障诊断中改进的冲突A*算法在搜索速度上相比冲突A*算法提升50%,证明了该算法在卫星电源系统故障诊断中应用的有效性。For in-orbit fault diagnosis of satellite power system,an improved conflict A*algorithm fault diagnosis method is proposed;The improved conflict A*algorithm adds an extended node abatement module onthe basis of the conflict A*algorithm,sothe fault isolationis used to speed up the search;Firstly,the improved conflict A*algorithm generates a candidate diagnosis,and then generates the output corresponding to the component in the satellite power system model,when the generated outputof the model component isdifferent fromthe actual observed value,the improved conflict A*algorithm reduces the scalable conflict nodes,and then generates the next candidate diagnosis and cycles until the end of the search;a multi-component constrained satellite power system model is used to carry out the validation experiment,the multiple fault experimental results show that,compared with the conflicting A*algorithm,the improved conflicting A*algorithm improves the search speed by 50%,which proves the applicationeffectiveness of the algorithm in the satellite power system fault diagnosis.

关 键 词：故障诊断 A*算法 定性模型 卫星电源 逻辑约束 

分 类 号：TP277.3[自动化与计算机技术—检测技术与自动化装置]