Simulation of Control System for a Half-Car Suspension System for Passenger Vehicle Application by Designing an LQR Controller

Abstract

The constantly growing topic of inventive vehicle system design is of interest to researchers. The difficulty stems from the ongoing requirement for advancement in vehicle handling, ride comfort, and driving dynamics. Based on a control method for ride comfort and vehicle handling, this study has proposed a mathematical model for a 4-DOF half-car active suspension system (ASS) employing an LQR (Linear Quadratic Regulator) controller. The task is simulated using MATLAB/Simulink software. The unsprung masses of the wheels’ heave displacements, the vehicle’s pitching dynamics, and the sprung masses of its body’s heave displacements are the regulated parameters. Compared to the antiquated passive suspension technology, its performance is superior (PSS). The simulation uses two bumpy sinusoidal roads and a random road input. Finally, the performance of the suggested controller was demonstrated using simulation software. The results of the simulation demonstrate that this study has improved its modeling and control capabilities.