Abstract
Aiming to analyze the effect of time-delay on the quality of magneto-rheological semi-active suspension control system,which exists in control input channel,a novel quarter vehicle magneto-rheological semi-active suspension model with time-delay is build.According to the time-delay differential equation and the variable structure control theory,a time-delay dependent sliding mode controller is designed,which transfers the factors of system time-delay stability to feasible linear matrix inequality analysis through theory deduction and LMI method.The problem of solving maximum margin time-delay can be changed to acquire the minimum value of generalized eigenvalue.Both desktop simulation with Matlab/Simulink and bench experimental results show that,in the scale of system margin time-delay,time-delay dependent sliding mode controller will guarantee the stability of system from the root.It can also weaken the influence of time-delay on the system control quality,so as to improve the vehicle ride comfort.
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