Study of the nonlinear control techniques for single acting VGT pneumatic actuator
by S. Laghrouche; A. Mehmood; M. El Bagdouri
International Journal of Vehicle Design (IJVD), Vol. 60, No. 3/4, 2012

Abstract: In this paper, we have developed a detailed mathematical model of a pneumatic actuator for a Variable Geometry Turbocharger (VGT) equipped with an Electro-pneumatic Pressure Converter (EPC). This model may require complex calculations for control purpose; therefore the dynamics of the EPC have been neglected and replaced by a static gain. These models incorporate friction and aerodynamic force related effects by using adaptive LuGre model. To compensate for parametric uncertainties, two single-input single-output nonlinear position control laws are designed using the second order sliding mode (SMC) and backstepping control. A comparative study with experiments shows the effectiveness of the proposed controllers.

Online publication date: Tue, 23-Apr-2013

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