Research on Control of Semi-Active Suspension System Using Hydraulic Single-Tube Shock Absorber

Abstract

There are some factors that influence a running vehicle. The dynamic forces acting at the contact between tires and rough road surfaces can have a detrimental impact on passenger health and vehicle safety. The purpose of the automotive suspension system is to reduce the impact of these forces and vibrations on passengers and also improve mobility, safety and the vehicle’s longevity itself. The stiffness of the springs and the damping characteristic of the shock absorbers should be sufficiently non-linear for system's substantial performance. Many studies on the control of vehicle suspension system have lately been conducted in order to increase ride comfort and maneuverability but shock absorber’s model has not been described detailly. This paper proposed a PID controller for a semi-active suspension system with a hydraulic single-tube shock absorber. A quarter-car model with a sub-model of the single-tube shock absorber was used to perform the simulation. In comparison with the non-controlled system, the damping performance of the controlled system increased significantly.