Multiple Lunberger observer for an induction motor represented by decoupled multiple model

This paper addresses the analysis and design of the state estimation of the induction motor (IM) speed as a non linear system, subject of several disturbances as load disturbances and parameters variation represented by a multiple model. Thus, in this paper, we propose the synthesis of a Lunberger multiple observer. This study consists of estimating the asynchronous machine speed through the determination of each local observer earning. The obtained sub observers are interpolated using the validity concept. Experimental results for 1kw IM modeling are operated on a dSpace system with DS1104 controller board based on digital signal processor (DSP) TMS320F240. Obtained results shows the performances of the proposed multiple observer.

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