Research on the sliding mode control algorithm for an automotive active suspension system

Abstract

     The suspension system is used to control the vibrations of the vehicle while traveling on the road. In this paper, the sliding mode control (SMC) algorithm is designed to control the active suspension (active suspension). This is a complex algorithm, and it is suitable for nonlinear oscillation systems with the input excitation being of predetermined form, such as automobile suspension systems. The simulation process is done by MATLAB-Simulink software with two specific cases. According to the calculation results, the displacement and acceleration of the vehicle body are reduced sharply when using the sliding control algorithm for the suspension system. In addition, the car's stability is also better guaranteed when equipped with an active suspension system (as evidenced by the change in wheel dynamics load). The chattering phenomenon still occurs when the oscillation changes phase;
this is the nature of the sliding mode control algorithm. However, its influence is not great. In the following studies, the sliding mode control algorithm can be combined with other intelligent algorithms to solve this problem.