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Article:Backstepping Controller Design using a High Gain Observer for Induction Motor
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 23 - Number 3 |
| Year of Publication: 2011 |
| Authors: Haj Brahim Imen, Soufien Hajji, Soufien Hajji |
10.5120/2873-3730
|
Haj Brahim Imen, Soufien Hajji, Soufien Hajji . Article:Backstepping Controller Design using a High Gain Observer for Induction Motor. International Journal of Computer Applications. 23, 3 ( June 2011), 1-6. DOI=10.5120/2873-3730
Abstract
In this paper, a backstepping controller of Induction Motor (IM) is proposed using the fifth order model in fixed two frame reference axis with rotor flux and stator currents as state variables. The approach of backstepping requires, generally, that the nonlinear system is in strict feed-back loop. To implement this strategy over the IM, some transformations on the model (α, β) of the machine have been carried out without recourse to the oriented flux hypothesis which allows a triangular state representation. The overall system stability is proved by Lyapunov theory. Indeed the controller relationship depends on the unmeasured states of the IM, and a nonlinear observer to high gain is used in order to reconstruct the motor speed, the rotor flux and the load torque. Simulation results are provided to illustrate the effectiveness of the proposed approach and the robustness to uncertainties, such as rotor resistance variations.
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