PID Controlled Semi-active Suspension System using Magneto-rheological Damper for Vehicle

Abstract

Vibration alleviation with semi-active suspension system has received significant attention of automotive industries recently. It’s strong potential to control the device without imposing heavy power demands is the notable advantage over the others. This paper aims at evaluating the performance of PID controlled semi-active suspension system using magneto-rheological (MR) damper and its comparison with passive suspension on MATLAB/SIMULINK platform. The purpose of PID controller in this system is to control the external/damping force with reference to the displacement of sprung and un-sprung mass of vehicle. The performance of the system is evaluated in terms of displacement and acceleration at step and random input. The damping force of the MR damper referred in this paper is determined experimentally. The MR damper is acting as a semi-active control device in the suspension system whose function is to maintain the vehicle body stable by absorbing force from vehicle and transferring it to vehicle.