Force Control System for an Automotive Semi-active Suspension

Carlos A Vivas-Lopez (1) , Diana A Hernández-Alcántara (1) , Manh Quan Nguyen (2) , Ruben Morales-Menendez (1) , Olivier Sename (2)

1 ITESM - Tecnológico de Monterrey = Monterrey Institute of Technology
2 GIPSA-SLR - GIPSA - Systèmes linéaires et robustesse

A new semi-active suspension control system is proposed. This control system includes a Linear Parameter Varying (LPV) controller which was designed to improve the ride comfort. It also incorporates a Force Control System (FCS) to transform the force command from the LPV controller to a input signal for the Electro-Rheological (ER) semi-active damper. This FCS was assessed by its tracking performance of the desired force command, with a 7 % of tracking error. Then the semi-active control system was evaluated in a Quarter of Vehicle (QoV) model under two tests: a Bump and a Road Profile. The results were a reduction up to 19 % (Bump test) and 29 % (Road Profile test), of the sprung mass position compared with a passive suspension. Additionally, an improvement up to 14 % was obtained when compared with a LPV controller using a simple model inversion Force-Manipulation transformation.

Mots clés: LPV systems; Automotive semi-active dampers; Electro-Rheological shock absorber

Domaines: Automatique / Robotique

Carlos A Vivas-Lopez, Diana A Hernández-Alcántara, Manh Quan Nguyen, Ruben Morales-Menendez, Olivier Sename. Force Control System for an Automotive Semi-active Suspension. LPVS 2015 - 1st IFAC Workshop on Linear Parameter Varying Systems, Oct 2015, Grenoble, France. ⟨hal-01412892⟩