Performance comparison of active and semi-active SMC and LQR regulators in a quarter-car model

In this paper, an analysis is performed on a quarter-car model of car suspension with semi-active and active damper utilizing the sliding mode (SMC) and linear-quadratic control (LQR). The effect of control parameters and time delays in the transmission of control signal on the factors related to the safety and comfort of driving is investigated. The results obtained from numerical simulations are shown in form of frequency characteristics for several selected performance factors.