ANALYSIS OF PASSIVE AND SEMI ACTIVE CONTROLLED SUSPENSION SYSTEMS FOR RIDE COMFORT IN AN OMNIBUS PASSING OVER A SPEED BUMP

Abstract

This paper describes the modeling, and testing of skyhook and other semi active suspension control strategies. The control performance of a three-degree-of-freedom quarter car semi active suspension systems is investigated using Matlab/Simulink, model. The objective of this paper is to present a comprehensive analysis of novel hybrid semi- active control algorithms and to compare the semi-active and passive systems in terms of human body vibrational displacements and accelerations. A theoretical model of the human seated model is developed in order to simulate the vertical motion of the Passenger in an omnibus when the vehicle passing over a speed bump. The mathematical model of these systems is presented. Ride comfort of off-road vehicles can be estimated by replacing the normal passive dampers in the vehicle suspension system with controllable, two-state, semi-active dampers.