Title: Non-linear control of vehicle's rollover using sliding mode controller for new 8 degrees of freedom suspension model
Authors: Amir Hossein Kazemian; Majid Fooladi; Hossein Darijani
Addresses: Mechanical Engineering Department, Shahid Bahonar University of Kerman, Kerman, 7618868366, Iran; Faculty of Engineering, Mechanical Engineering Department, University of Sistan and Baluchestan, Zahedan, 9816745845, Iran ' Faculty of Engineering, Mechanical Engineering Department, Shahid Bahonar University of Kerman, Kerman, 7618868366, Iran ' Faculty of Engineering, Mechanical Engineering Department, Shahid Bahonar University of Kerman, Kerman, 7618868366, Iran
Abstract: Stability control system is a part of active safety systems in vehicles, which is designed to control the vehicles' dynamic motion in emergency manoeuvres. In present study, modelling and simulation of a 4 degrees of freedom (4DOFs) passive suspension system initially is considered and then in order to improve the efficiency of controlling system, a new suspension system with 8DOFs by adding masses to sprung and unsprung parts of suspension system and using hybrid semi-active damper is designed. To investigate the effect of DOF on the controller performance, sliding mode controller (SMC) for models with 8DOFs are designed in MATLAB and controller performances are studied. Also, numerical results from a typical vehicle that is simulated in CarSim are the input for MATLAB simulation. Investigations show that increasing degrees of freedom accompany with applying hybrid semi-active damper lead to better stability and good handling characteristics of vehicle.
Keywords: semi-active hybrid system; good handling; sliding mode control; stability control; suspension system; rollover; Lyapunov theory; active safety system; vehicle's manoeuvre; sprung mass; unsprung mass.
International Journal of Heavy Vehicle Systems, 2019 Vol.26 No.5, pp.707 - 726
Received: 05 Oct 2016
Accepted: 13 Mar 2017
Published online: 12 Aug 2019 *