Abstract: Sliding mode controller for a vehicle active suspension
system is designed in this study. The widely used quarter car model
is preferred and it is aimed to improve the ride comfort of the
passengers. The effect of the actuator time delay, which may arise
due to the information processing, sensors or actuator dynamics, is
also taken into account during the design of the controller. A sliding
mode controller was designed that has taken into account the actuator
time delay by using Smith predictor. The successful performance of
the designed controller is confirmed via numerical results.