模拟电路仿真与故障字典生成方法

Analog Circuit Simulation and Fault Dictionary Generation Method

摘要:

针对模拟电路故障诊断需求，对模拟电路仿真和故障字典生成的实现方法进行了研究。首先，设计软件实现总体结构，从软件界面层、运行层、数据访问层、数据层等方面搭建过程中需要的电路知识管理、工程管理、电路仿真设置、仿真运行、故障字典生成和辅助故障诊断等功能框架；进而通过创建被测电路仿真原理图、新建仿真工程、仿真设置、故障注入等详细设计，实现被测电路的功能仿真和故障仿真；然后根据仿真结果，利用故障字典生成器生成所有故障模式下的整数编码故障字典；最终辅助诊断功能，验证故障字典是否可用。通过对演示板12个故障注入后的仿真数据做故障字典生成训练，并完成了对实测数据的故障定位，验证了该方法的可行性，为模拟电路故障诊断提供了实用的测试方法和手段，具有较好的实用价值。

Abstract:

In response to the need for analog circuit fault diagnosis,the implementation methods of analog circuit simulation and fault dictionary generation were studied. First, designed the overall structure of the software, and build the functional framework of circuit knowledge management, engineering management, circuit simulation settings, simulation operation, fault dictionary generation and auxiliary fault diagnosis required in the process from the software interface layer, operation layer, Data access layer, data layer and other aspects. Furthermore, by creating a simulation schematic diagram of the tested circuit, creating a new simulation project, setting up simulation settings, injecting faults, and other detailed designs, functional simulation and fault simulation of the tested circuit can be achieved. Then, based on the simulation results, used a fault dictionary generator to generate integer encoded fault dictionaries for all fault modes. By conducting fault dictionary generation training on the simulation data of 12 fault injections on the demonstration board, and completing fault localization on the measured data, the feasibility of this method was verified, provided a practical testing method and means for analog circuit fault diagnosis, with good practical value.