Enhancing Ride Comfort Using Fractional Order Terminal Sliding Mode Controller For The Active Suspension System In The Half Car Model

Abstract

The Active Suspension System (ASS) in a vehicle helps to reduce the vibration and increases the ride quality. It produces a control force which is acting against the vibration. The effectiveness of the ASS is based on the types of controller used. In this paper, a half car model with ASS is considered for analysis. To reduce the body acceleration and to increase the ride quality, the Fractional Order Terminal Sliding Mode Controller (FOTSMC) is proposed and its performance is compared with Terminal Sliding Mode Controller (TSMC), Fractional Order Sliding Mode Controller (FOSMC) and passive system. Two types of road disturbance such as single bump and random road are given to the system and performance of the controllers are analysed. From the time responses, Root Mean Square (RMS) and frequency weighted RMS, FOTSMC performs better than the FOSMC, TSMC, and passive system.