A new robust combined control system for improving manoeuvrability, lateral stability and rollover prevention of a vehicle. (March 2020)

• Record Type: Journal Article
• Authors: Saeedi, Mohammad Amin
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 234:Number 1(2020:Mar.)
• Page Start: 198
• Page End: 213
• Publication Date: 2020-03
• Subjects: Combined control system -- yaw stability -- lateral stability -- nonlinear control system -- manoeuvrability; Machinery, Dynamics of -- Periodicals; Machine design -- Periodicals; 621.815
• DOI: 10.1177/1464419319887818
• Languages: English
• ISSNs: 1464-4193

Abstract

This paper presents a new effective method in order to achieve an appropriate performance for a four-wheeled vehicle during different conditions. The main goal of the study is focused on the handling improvement and lateral stability increment of the vehicle using a robust combined control system. First, in order to increase the vehicle's manoeuvrability, an active steering control system is proposed based on the sliding mode control method and using the simplified dynamic model. The tracking of the desired values of the yaw rate and lateral velocity of the vehicle is the main purpose for using the controller. Also, in order for verifying the performance of the sliding mode controller, the linearization feedback control method is used to design the active steering control system. Moreover, to improve the directional stability of the vehicle, a new active roll control system is proposed. In this control system, the roll angle is considered as the state variable as well as the active anti-roll-bar is utilized as an actuator to generate the roll moment. Then, a 14-degrees-of-freedom nonlinear dynamic model of the vehicle validated using CarSim software is utilized. Afterward, the performance of the designed combined control system is investigated at various velocities. The simulation results confirm that the combined control system has an important effect on vehicle's manoeuvrability improvement and its lateral stability increment, especially during severe transient manoeuvre.