Fault-tolerant control and experiment on vehicle semi-active suspension system based on control law reconfiguration

作者：Yang, Liuqing; Chen, Wuwei^*; Zhang, Rongyun; Huang, He

来源：Transactions of the Chinese Society for Agricultural Machinery, 2013, 44(10): 1-9.

DOI：10.6041/j.issn.1000-1298.2013.10.001

• Active fault
• Active fault tolerant control
• Actuator fault
• Comfort performance
• Control laws
• Fault tolerant control
• Semi active suspension
• Semi-active suspension systems

An active fault-tolerant control strategy based on control law reconfiguration was put forward for vehicle semi-active suspension system. A 2-DOF quarter vehicle semi-active suspension system model and fault suspension model were built. Semi-active suspension fault detection and on-line diagnosis of suspension actuator's fault gain were realized by output residual error obtained from designing robust observer. Then, on the basis of LQG controller and on-line diagnosis, active fault-tolerant control was realized on fault suspension through adjusting LQG control law to design fault-tolerant controller based on control law reconfiguration. The results of simulation under Matlab/Simulink and bench experiment showed that active fault-tolerant control strategy based on control law reconfiguration could rapidly restore the comfort performance of fault suspension system to the level close to that of semi-active suspension in the absence of fault after 0.5 to 2.0 s delay, eliminate the effects caused by actuator fault, and increase the reliability of suspension control.

• 出版日期2013-10
• 单位合肥工业大学