Control an Active Suspension System by Using PID and LQR Controller

The suspension has a very important effect on the comfort and stability of the vehicle on the move. To improve safety issues as well as comfort and convenience, the active suspension system is used to replace the conventional mechanical suspension system (passive suspension system). There are many controllers used to control the active suspension system such as PID controller, LQG controller, LPV controller. This research focuses on analyzing, evaluating, comparing, and applying two controllers: PID controller and LQR controller for an active suspension system. The results of the research have shown that when the vehicle is equipped with an active suspension system, the values of displacement and acceleration of the sprung mass are significantly improved. Besides, the PID controller supports to optimize the body's acceleration, the LQR controller supports to optimize the body's displacement. This research will be the basis for supporting more complex researches in the future.