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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.
Vivas-Lopez, C. A., Hernandez-Alcantara, D., Nguyen, M. Q., Morales-Menendez, R., & Sename, O. (2015). Force control system for an automotive semi-active suspension. In IFAC-PapersOnLine (Vol. 48, pp. 55–60). Elsevier B.V. https://doi.org/10.1016/j.ifacol.2015.11.113