Currently, majorities of the robust H∞ 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∞ 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∞ 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∞ 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.
Robust fault-tolerant H∞ output feedback control of active suspension and dynamic vibration absorber with finite-frequency constraint
IET Intelligent Transport Systems ; 14 , 14 ; 1935-1945
2021-02-11
11 pages
Article (Journal)
Electronic Resource
English
shock absorbers , linear matrix inequality , fault-tolerant effectiveness , fault tolerant control , vibrations , vibration control , active suspension control , wheels , spring-damper parameters , sprung mass , finite-frequency constraint , linear matrix inequalities , IWM driven electric vehicles , actuators , robust control , actuator force noises , vehicle dynamics , in-wheel-motor , DVA-based electric wheel model , control system synthesis , IWM driven EVs , PSO , resonance frequency range , electric vehicles , springs (mechanical) , feedback , dynamic vibration absorber , frequency constraint , vertical vibration suppression , robust fault-tolerant H<sub>∞</sub> output feedback control strategy , particle swarm optimisation , suspensions (mechanical components)
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