伺服回路故障检测方法研究

Research for Fault Diagnosis Method of Servo Loop

航空发动机伺服回路复杂,其工作可靠性和故障容错性对于发动机安全至关重要,因此研究伺服回路的故障检测技术十分必要。提出1种基于模型监控的快速伺服回路故障检测方法,根据伺服回路物理机构从电气到机械进行故障的逐级检测,通过比较器的设计实现回路故障的快速判断。与试验结果对比表明:该方法能够准确检测系统故障,并且缩短了系统判故时间,简化了伺服机构建模和软件代码实现。为数控系统快速检测故障提供了高效的技术手段,具有一定的通用性。

Actuator loop of aeroengine is complex, its reliability and fault-tolerant control is important to the safety of aeroengine.Therefore, it is quite necessary to research for fault diagnosis of actuator loop. A quick model-based monitoring actuator loop fault diagnosis method was put forward. Fault diagnosis were started from physical actuator to digital electronic system one by one, system faults were quickly judged by comparator of actuator loop. Compared with the result of test, the method can detect fault more exactly and faster than traditional method and simplifies the model of actuator loop and software code. The method is universal and provides an efficient technological means for quick fault diagnosis of digital electronic control system.