摘要:AbstractAnH∞observer for theSemi-Active (SA)force of anElectro-Rheological (ER)damper in aQuarter of Vehicle (QoV)model is proposed. This robust observer is designed in theH∞framework to minimize the effect of the unknown road disturbance on the force estimation and includes the damper nonlinearities and its dynamic behavior. Simulation and experimental rig tests results using a 1/5 scale car using easily accessible measurements for the observer, such as acceleration sensors, which are relatively cheap and easy to implement in a real environment. The estimated damper force could be used in a state feedback control strategy to improve comfort and road holding performance of a vehicle with a reduced number of sensors.