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1

Passivity Control with sliding mode observer of induction motor

Mellah F., Chenafa M., Bouhenna A., Mansouri A.

Przegląd Elektrotechniczny

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2011

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R. 87, nr 7

208-213

EN

In this paper we will present a control based on the passivity of the induction motor - the difficulty of the measurement of flux rotoric is surmounted by a sliding mode observer. A variety (surface) on which the error in estimation of the output is null (stable) is defined. There are established the conditions of sliding (calculation of the observer gains) for which all trajectories of system go towards surface (attractivity) and there remain (invariance). The synthesis of the passivity control with the estimate of flux rotoric by the means of this observer is illustrated by a simulation under Matlab-Simulink. Total stability is guaranteed and the tracking of flux and the torque is reached.

PL

Zaprezentowano system sterowania silnikiem indukcyjnym przy wykorzystaniu obserwatora ślizgowego. Poszukiwane są warunki ślizgowe dla których wszystkie trajektorie są skierowane do powierzchni i pozostają niezmienne. Symulacje potwierdziły stabilność systemu.

2

Global Stability of Linearizing Control With a New Robust Nonlinear Observer of The Induction Motor

Chenafa M., Mansouri A., Bouhenna A., Etien E., Belaidi A., Denai M. A.

International Journal of Applied Mathematics and Computer Science

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2005

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Vol. 15, no 2

235-243

EN

This paper mainly deals with the design of an advanced control law with an observer for a special class of nonlinear systems. We design an observer with a gain as a function of speed. We study the solution to the output feedback torque and rotor flux-tracking problem for an induction motor model given in the natural frame. We propose a new robust nonlinear observer and prove the global stability of the interlaced controller-observer system. The control algorithm is studied through simulations and applied in many configurations (various set points, flux and speed profiles and torque disturbances), and is shown to be very efficient.

3

Powerful nonlinear observer associated with field-oriented control of an induction motor

Mansouri A., Chenafa M., Bouhenna A., Etien E.

International Journal of Applied Mathematics and Computer Science

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2004

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Vol. 14, no 2

209-220

EN

In this paper, we associate field-oriented control with a powerful nonlinear robust flux observer for an induction motor to show the improvement made by this observer compared with the open-loop and classical estimator used in this type of control. We implement this design strategy through an extension of a special class of nonlinear multivariable systems satisfying some regularity assumptions. We show by an extensive study that this observer is completely satisfactory at low and nominal speeds and it is not sensitive to disturbances and parametric errors. It is robust to changes in load torque, rotational speed and rotor resistance. The method achieves a good performance with only one easier gain tuning obtained from an algebraic Lyapunov equation. Finally, we present results and simulations with concluding remarks on the advantages and perspectives for the observer proposed with the field-oriented control.