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
2020-12-01
11 pages
Article (Journal)
Electronic Resource
English
actuators , feedback , dynamic vibration absorber , DVA‐based electric wheel model , finite‐frequency constraint , sprung mass , spring‐damper parameters , in‐wheel‐motor , springs (mechanical) , resonance frequency range , control system synthesis , electric vehicles , suspensions (mechanical components) , wheels , shock absorbers , vehicle dynamics , IWM driven EVs , frequency constraint , PSO , fault‐tolerant effectiveness , vibration control , active suspension control , robust control , linear matrix inequality , particle swarm optimisation , robust fault‐tolerant H∞ output feedback control strategy , vibrations , fault tolerant control , vertical vibration suppression , IWM driven electric vehicles , actuator force noises , linear matrix inequalities
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