Disturbance decoupled fault diagnosis for sensor fault of maglev suspension system
来源期刊：中南大学学报(英文版)2013年第6期
论文作者：LI Yun(李云) LI Jie(李杰) ZHANG Geng(张耿) TIAN Wen-jing(田文静)
文章页码：1545 - 1551
Key words：maglev system; suspension control; robust control; disturbance observer; fault reconstruction
Abstract: A disturbance decoupled fault diagnosis strategy is proposed. This disturbance decoupled fault diagnosis is both robust to disturbances and sensitive to sensor faults of magnetic levitation control system. First, a robust controller based on a novel disturbance observer is devised to improve the disturbance attenuation ability, which greatly enhances the robustness of the system. Second, a fault reconstruction technique with adaptive method is presented, along with a strict verification for guaranteeing the robustness of fault. This fault reconstruction technique provides an accurate sensor fault reconstruction. From the results of simulation and experiments conducted on the CMS-04 maglev train, the integrated strategy is robust to model uncertainties of the system and the fault reconstruction algorithm is able to reconstruct the dynamic uncertain faults.
LI Yun(李云), LI Jie(李杰), ZHANG Geng(张耿), TIAN Wen-jing(田文静)
(College of Mechatronics Engineering and Automation, National University of Defense Technology,Changsha 410073, China)
Abstract:A disturbance decoupled fault diagnosis strategy is proposed. This disturbance decoupled fault diagnosis is both robust to disturbances and sensitive to sensor faults of magnetic levitation control system. First, a robust controller based on a novel disturbance observer is devised to improve the disturbance attenuation ability, which greatly enhances the robustness of the system. Second, a fault reconstruction technique with adaptive method is presented, along with a strict verification for guaranteeing the robustness of fault. This fault reconstruction technique provides an accurate sensor fault reconstruction. From the results of simulation and experiments conducted on the CMS-04 maglev train, the integrated strategy is robust to model uncertainties of the system and the fault reconstruction algorithm is able to reconstruct the dynamic uncertain faults.
Key words:maglev system; suspension control; robust control; disturbance observer; fault reconstruction
