Robust fault-tolerant H output feedback control of active suspension and dynamic vibration absorber with finite-frequency constraint
IET INTELLIGENT TRANSPORT SYSTEMS(2020)
摘要
Currently, majorities of the robust H-infinity control methods are designed for active suspensions, and seldom take the active control of the in-wheel-motor (IWM) into consideration for IWM driven electric vehicles (EVs). In this study, a robust fault-tolerant H-infinity output feedback control strategy with finite-frequency constraint is proposed to synchronously control the active suspension and dynamic vibration absorber (DVA) for IWM driven EVs. Firstly, a DVA-based electric wheel model is developed, in which the IWM is designed as DVA. Furthermore, the spring-damper parameters of the DVA are matched by using particle swarm optimisation (PSO). Then, the robust fault-tolerant H-infinity output feedback control strategy is developed based on linear matrix inequality, in which the finite-frequency constraint is designed in the resonance frequency range of sprung mass. Finally, simulation results validate that the PSO can effectively optimise the spring-damper parameters of the DVA. The robust fault-tolerant H-infinity output feedback control with finite-frequency constraint can effectively improve the ride comfort and suppress the vertical vibration caused by IWM compared with entire frequency constraint. Meanwhile, the fault-tolerant effectiveness of the proposed method is demonstrated under the actuator faults concerning the actuator force noises and losses.
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关键词
vibration control,electric vehicles,feedback,vibrations,shock absorbers,vehicle dynamics,wheels,robust control,linear matrix inequalities,suspensions (mechanical components),control system synthesis,particle swarm optimisation,springs (mechanical),actuators,fault tolerant control,active suspension control,IWM driven electric vehicles,finite-frequency constraint,dynamic vibration absorber,IWM driven EVs,DVA-based electric wheel model,spring-damper parameters,resonance frequency range,frequency constraint,fault-tolerant effectiveness,robust fault-tolerant H-infinity output feedback control strategy,in-wheel-motor,particle swarm optimisation,PSO,linear matrix inequality,sprung mass,vertical vibration suppression,actuator force noises
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