Takagi Sugeno fuzzy observer based Direct Rotor Field Oriented Control of induction machine

This paper proposes a Takagi Sugeno (TS) fuzzy field observer in a rotor-flux-oriented reference frame. The proposed approach dealt with the conventional Direct Rotor Field Oriented Control (DRFOC) in a high speed application. The main aims are to provide new methods to observe the flux in same reference frame as the controller. In the initial development, we propose a TS model for the induction machine. Later, a TS fuzzy full order observer is described. Then a stability and a D-stability analysis are presented to proof in the first time, the stability and to garret in the second time, some dynamic behaviour for the observer through the Lyapunov theory. The proposed results are based on LMIs terms (Linear Matrix Inequalities) which can be solved easily using Matlab tools. A numerical example is provided to show the effectiveness of the proposed results.