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Contribution à la modélisation et la commande des systèmes électrohydrauliques

Abstract : Contribution to modeling and control of electrohydraulic systems In this manuscript, we gave a new result on the stabilization of a class of nonlinear systems which are only continuous, it acts of the systems defined by a field of vectors which is not derivable. The application of our result, we applied our result for the stabilization of electrohydraulic systems by taking into account the dynamics of the servovalves used. This is class without carrying out any linearization of the model descriptions. Indeed, we treated the case of an electrohydraulic system ordered by one and two servovalves, taking into account their dynamics. Simulations carried out show that the results obtained are very satisfactory. In order to carry out a comparison we studied various linear controls, in particular, the stat feedback, the output feedback and the use of a PID controller. The different types of control law gave good results. Indeed, they made it possible to answer several criteria, for example the time response overshooting, etc. Nevertheless, they present some disadvantages. For example a linearization around a point of equilibrium reveals a local character, and thus this technique becomes inappropriate if one seeks to operate on an operating range. This work can also be applied to the stabilization of the electropneumatic actuators.
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Submitted on : Thursday, March 29, 2018 - 10:40:36 AM
Last modification on : Saturday, October 16, 2021 - 11:14:14 AM

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  • HAL Id : tel-01746578, version 1



Mohamed Tafraouti. Contribution à la modélisation et la commande des systèmes électrohydrauliques. Autre. Université Henri Poincaré - Nancy 1, 2006. Français. ⟨NNT : 2006NAN10149⟩. ⟨tel-01746578⟩



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