Control of a hydraulic servo system using sliding mode with an integral and realizable reference compensation

Moez Feki, Emna Kolsi, Nabil Derbel

Abstract


In this paper a control law was designed to accurately control the rod position of hydraulic servo system. Infact, due to its having a nonlinear model, the hydraulic servo  system is not accurately stabilizedby a proportional controller and suffers from wind up phenomenon when applying the PI controller.To overcome the problems encountered by the action of these linear controllers, a sliding modecontroller with an integral and realizable reference compensation is used to obtain an accurateposition in addition to having a short settling time. The efficiency of the proposed scheme isillustrated using numerical simulations.

Keywords


Hydraulic servo system; sliding mode control; actuator saturation; realizable reference.

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