A LPV control approach for a semi-active hydraulic damper

Sébastien Aubouet (1, 2) , Luc Dugard (2) , Olivier Sename (2) , Benjamin Talon (1)

1 SOBEN SAS
2 GIPSA-SLR - GIPSA - Systèmes linéaires et robustesse

In this paper, a new control strategy is developed to improve comfort and roadholding of a ground vehicle equipped with an industrial damper. This damper can be controlled by a small servomechanism which adjusts the damping rate. The main controller is a Linear Parameter Varying static state-feedback controller synthesized in the H∞/LPV framework to compute the required damping force that minimizes the movements of the vehicle's body on one hand, and the deflection of the tire on the other hand. A scheduling strategy is developed on the basis of the real damper behavior to improve performances without using active damping forces which would be useless for such a semi-active system. Here the controller takes into account the technological constraints, the damper behavior and is easy to implement in an industrial application. The comfort and roadholding levels of the semi-active suspension are studied using some adapted criteria and compared with the passive suspension. Some simulations emphasize the improvements of this control stategy that will be tested by SOBEN on a testing car in the near future.

Mots clés: automotive; LPV; control; damper

Domaines: Automatique / Robotique

Sébastien Aubouet, Luc Dugard, Olivier Sename, Benjamin Talon. A LPV control approach for a semi-active hydraulic damper. VSDIA 2008 - 11th Mini Conference on Vehicle System Dynamics, Identification and Anomalies, Nov 2008, Budapest, Hungary. ⟨hal-00385259⟩