Design and experimental investigation of Demand Dependent Active Suspension for vehicle rollover control

Abstract

This paper presents a novel design for demand dependent active suspension (DDAS) focusing on vehicle rollover control. Active suspensions take credit for improving ride comfort and handling performance, but to use active suspension in vehicle rollover control has not been widely investigated. The proposed active suspension design consists of four double direction hydraulic actuators, hydraulically interconnected, and it can actively tilt the vehicle against its roll motion by supplying a required restoring moment, which is over the competence of passive or semi-active suspension. Based on a real vehicle fitted with DDAS, the experimental investigation validates the effectiveness of DDAS in vehicle rollover control. Abstract-This paper presents a novel design for Demand Dependent Active Suspension (DDAS) focusing on vehicle rollover control. Active suspensions take credit for improving ride comfort and handling performance, but to use active suspension in vehicle rollover control has not been widely investigated. The proposed active suspension design consists of four double direction hydraulic actuators, hydraulically interconnected, and it can actively tilt the vehicle against its roll motion by supplying a required restoring moment, which is over the competence of passive or semi-active suspension. Based on a real vehicle fitted with DDAS, the experimental investigation validates the effectiveness of DDAS in vehicle rollover control.

Fuzzy control of hydraulically interconnected suspension with configuration switching

“…Interconnected suspension has been recognized to be able to achieve a desired vehicle dynamic performance on a particular body-wheel motion-mode, such as pitch or roll motionmode. Attempts were also made to bring active components, power unit, and electronic valves into interconnected suspension to build an active hydraulically interconnected suspension [4], and gained possibly enhanced vehicle performance with reduced cost and energy consumption. Instead of using other conventional control algorithms [8], a fuzzy controller was proposed in this paper.…”

“…VEHICLE SUSPENSION MODEL A hydraulically interconnected suspension system consists of four double direction hydraulic actuators which are interconnected and powered by an electrical pump [4]. The diagram of this system is shown in Fig.…”

Backstepping sliding mode control for an active hydraulically interconnected suspension

“…In Tang et al, 12 an active HIS system magnifies the anti-roll stiffness without sacrificing the bump stiffness and is applied on a narrow urban vehicle. A demand dependent active suspension was proposed in Wang et al 13 This active suspension combines active control and configuration switching. It can provide different restoring forces and moments separately, according to the demand of vehicle motions.…”

Coordinated control strategies for active steering, differential braking and active suspension for vehicle stability, handling and safety improvement

“…To increase ride comfort and vehicle road holding, many researchers applied various control methods on active suspension system, such as sliding mode controller [1], backstepping controller [2], LPV/H∞ control [3], fuzzy control [4], PID State Feedback Controller [5], and PID [6]. Few other papers develop controllers for the active suspension system for rollover prevention [7][8] [9]. For longitudinal and lateral dynamics, research efforts have been focused on vehicle lateral stability by integrating active steering and differential braking system [10] [11][12] [13].…”