It is some of connection between wheel and automobile body that the vehicle suspension, whose quality directly influences that automobile goes comfortably. This thesis carries on simulation study to the vehicle suspension under MATLAB.
First of all, the simple vehicle suspension model is established, secondly, an adjustable PID controller is designed according to the characteristic of the model, thus comfortable-going is satisfied. Moreover, frequency analysis is carried to vehicle suspension system, from which we know the stability margin of suspension system is very poor, and phase-lead compensation is joined and contacted for this reason. Finally, animation simulation system of the vehicle suspension is designed under GUI, thus we easily find that the settling time and overshoot of response under control are both much less than that of nature response.
Key words comfortable-going, PID controller, stability margin, animation