Abstract
A non-linear quarter car vehicle model is used in this study, for developing an active suspension control algorithm. The control method used is optimal sliding mode control, along with feedback linearization technique for compensating the nonlinear aspects of the plant. In addition to the work in recent literature that applies these control methods, estimation of the static suspension deflection; i.e. vehicle sprung mass is performed. Through simulation results, it is shown that correct information of vehicle sprung mass, compared to taking it as a constant parameter in control design, improves the performance of the controller. This in turn, reduces the sprung mass acceleration level, and enhances ride comfort.
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