某型发动机控制器模拟接口电路测试性设计与验证

Testability Design and Verification of Analog Interface Circuit for an Engine Controller

摘要:

目前发动机控制系统的结构越来越复杂,为测试、维修带来了极大的不便,文中针对某型发动机控制器进行了测试性设计,并以其中模拟接口电路为例对设计情况进行了详细说明,最后采用故障注入手段对电路进行了测试性试验验证。验证结果表明发动机控制器测试性设计能够实时反映发动机控制系统的故障状态,让使用者或操作者能够依据这些状态参数准确判断出控制系统的工作状态。当发生故障时,可以快速定位到某一模块,并将故障隔离到某一功能电路,极大的提高了系统维护的效率。

Abstract:

At present,the structure of engine control system is becoming more and more complex,which brings great inconvenience for testing and maintenance.In this paper,the testability design of an engine controller is carried out,and the analog interface circuit is taken as an example to illustrate the design in detail.Finally,the testability verification of the circuit is carried out by means of fault injection.The verification results show that the testability design of the engine controller can reflect the fault state of engine control system in real time,and enable users or operators to accurately judge the working state of the control system based on these state parameters.When a fault occurs,it can locate a module quickly and isolate the fault to a functional circuit,which greatly improves the efficiency of system maintenance.