基于专家案例推理的板级电路智能故障诊断研究

Intelligent Fault Diagnosis Expert Case Based Reasoning Board-level Circuit

针对传统专家系统推理机所存在的匹配冲突问题,提出了一种将专家案例推理用于板级电路故障诊断的方法;该方法重点研究了专家案例推理的索引策略和匹配原则,并给出了案例的表示和组织存储方法及案例库的维护措施;根据研究表明,将分层多级索引机制和k-近邻匹配原则相结合,利用专家案例推理对板级电路进行故障诊断,能够解决匹配冲突等瓶颈问题.通过以航空机载电子设备中电源电路出现故障为例,得出专家案例推理具有诊断速度快、精确度高等优点.

For matching conflict traditional expert system inference engine that exist,a new expert case-based reasoning to board- level circuit for fault diagnosis; the method focuses on expert case- based reasoning and matching principle of indexing strategies,and gives case representation and organization of storage methods and case base maintenance measures; according to the study indicate that multi- level hierarchical indexing mechanism and k- nearest neighbor matching principle combined with the use of expert case- based reasoning for board- level circuit fault diagnosis,match conflict can be solved bottlenecks. By Airborne electronic equipment power supply circuit fails,for example,obtain expert diagnostic reasoning Case speed,accuracy and other advantages.