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Title: Active longitudinal load transfer control for improving vehicle's stability

Authors: Arash Hosseinian Ahangarnejad; Stefano Melzi

Addresses: Department of Mechanical Engineering, Politecnico di Milano, Campus Bovisa Sud – via La Masa 1, 20156 Milano, Italy ' Department of Mechanical Engineering, Politecnico di Milano, Campus Bovisa Sud – via La Masa 1, 20156 Milano, Italy

Abstract: This paper investigates the effectiveness of an active suspension system designed for regulating the normal force distribution during transients in a passenger car. The proposed control logic modifies the front-rear load distribution to influence the understeer-oversteer response of the vehicle; in particular, actuators of active suspensions are used to generate a system of inertia forces on the car-body for producing a longitudinal load transfer even at constant speed. The proposed control logic is tested numerically with a 14 degree-of-freedom vehicle model: open-loop manoeuvres like lane change and step steer were considered. Simulation results put into evidence that the system can improve of vehicle's stability during fast transients.

Keywords: longitudinal load transfer; active suspension; vehicle dynamics; dynamics and control; simulation; active controller; active safety; yaw rate control; understeer coefficient; normal load distribution.

DOI: 10.1504/IJVP.2019.097091

International Journal of Vehicle Performance, 2019 Vol.5 No.1, pp.2 - 17

Received: 16 Nov 2016
Accepted: 19 May 2017

Published online: 16 Dec 2018 *

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