舵机特征模型及其故障检测方法
收稿日期: 2013-08-05
修回日期: 2014-09-05
网络出版日期: 2014-09-26
基金资助
国家自然科学基金(61104082)
Characteristic model-based approach for actuator fault diagnosis
Received date: 2013-08-05
Revised date: 2014-09-05
Online published: 2014-09-26
Supported by
National Natural Science Foundation of China (61104082)
朱纪洪 , 和阳 , 黄志毅 . 舵机特征模型及其故障检测方法[J]. 航空学报, 2015 , 36(2) : 640 -650 . DOI: 10.7527/S1000-6893.2014.0200
Actuator fault diagnosis is very important to improve flight safety. Nevertheless, some nonlinear problems in classical approaches such as load time variability uncertainty and rate saturation etc. will affect the diagnosis, resulting in false alarm. This paper presents a characteristic model-based fault detection method for actuator to solve the problems. Firstly, a characteristic model used in diagnosis is established according to the bandwidth and the rate saturation of the actuator. Then, the reference responses of the velocity and displacement are calculated with state estimators. Lastly, judging by whether the residuals between the practical velocity or displacement and the references exceed the given thresholds or not, failures in motors or drives can be easily detected. This approach can avoid the false alarm caused by load uncertainty or rate saturation effectively, and the characteristic model, only related to the actuator bandwidth and rate saturation, is provided with the significant advantages of simplicity and practicability.
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