To address the problem of undetected disturbance in fault diagnosis of control system,an unknown input observer based on {1}-inverse is used for fault detection of control system of automobile engine.

• 针对控制系统故障诊断中存在的不可测干扰,利用一种基于广义逆的未知输入+观测器进行故障诊断,并将此方法用于汽车发动机电控系统执行器的故障检测问题。