Hybrid Nonovershooting Set-Point Pressure Regulation for a Wet Clutch

In this article, we propose a control-oriented Wiener model for wet-clutches in filled conditions and we discuss the associated identification technique. We design a novel hybrid controller, which ensures zero steady-state error and a fast nonovershooting response. We show that the controller parameters can be conveniently obtained by solving a set of linear matrix inequalities. Finally, we test the proposed control strategy on the hydromechanical variable transmission developed by Dana-Rexroth transmission systems. The experiments show good performance and robustness with respect to modeling errors and noise.