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Contribution à la modélisation et à la commande des systèmes électrohydrauliques

Abstract : In this manuscript, we gave a new result on the stabilization of the nonlinear systems which are only continuous, it acts of the systems defined by a field of vectors which is not derivable. The application of this result, we carried out it for the stabilization of the electrohydraulic systems by taking account of the dynamics of the servovalves used, this without carrying out any linearization of the model descriptions. Indeed, we treated the case of an electrohydraulic system ordered by one and two servovalves, this by taking account of 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 control by feedback thus the control by return of exit or by a corrector PID. This type of order proves to give good results. Indeed, they made it possible to answer several criteria, for example the response time, going beyond, etc And they led to good results of simulation. 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 could also apply to the stabilization of the electropneumatic actuators.
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https://tel.archives-ouvertes.fr/tel-00121720
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Submitted on : Thursday, December 21, 2006 - 4:14:41 PM
Last modification on : Friday, October 23, 2020 - 8:38:03 AM
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Mohamed Tafraouti. Contribution à la modélisation et à la commande des systèmes électrohydrauliques. Automatique / Robotique. Université Henri Poincaré - Nancy I, 2006. Français. ⟨tel-00121720⟩

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