数控系统传感器故障检测隔离及适应技术

FAILURE DETECTION ISOLATION AND ACCOMODATION OF SENSORS FOR ENGINE CONTROL SYSTEM

介绍一种发动机传感器故障的检测、隔离及适应方法，并给出某型涡轴发动机的数字仿真实例，说明该方法的有效性和实用性。

A method of failure detection,isolation and accomodation for engine sensors is presented.The method is based on engine component level nonlinear model and extended Kalman filter to obtain optimal estimation values of failed sensors and calculation references of the engine model.This makes engine model adapt to the actual engine perfectly and provides analytical redundancy for the failed sensors.In this case,the reliability of the engine control system is enhanced greatly.A numerical digital simulation of a given turboshaft engine has been accomplished.The results prove the effectiveness and practicability of the present method.