Simulation study of MR damper for bump road profile

In the current world scenario of automobiles, vibration is the major controlling factor which affects the ride comfort of the vehicle. The aim of this study is to simulate the automotive suspension system integrated with dampers filled with magneto-rheological (MR) fluid for vibration control and study the responses so as to enhance the passengers comfort. For this study, a quarter car model integrated with MR damper is selected. The Modified Bouc-Wen model is adopted for the MR damper. A sliding mode controller (SMC) is adopted in this study. The performance of the MR suspension system is analyzed by giving bump excitation with different vehicle speeds. Simulation study is carried out in MATLAB/Simulink©. For controlled MR suspension system, the displacement of the sprung mass and settling time is considerably reduced compared to the passive system.