Comparative study between luenberger observer and extended kalman filter for fault-tolerant control of induction motor drives

Abstract

In this paper, a robust active fault tolerant control (AFTC) scheme is proposed for induction motor drives (IMD) via input-output linearization control (IOLC) and nonlinear observer. In order to estimate the states and to reconstruct the faults, two different observers are used; a Luenberger observer (LO) and an extended kalman filter (EKF). Further we introduce feedback linearization strategy by choosing the output function as the rotor speed and flux square. To provide a direct comparison between these FTCs schemes, the performance is evaluated using the control of IMD under failures, variable speed, and variable parameters, finally the obtained results show that the proposed controller with the proposed observers provides a good trajectory tracking, and these schemes are robust with respect to faults, parameter variations, and external load disturbances for induction motor drive system.

DSPace Based Implementation of DRFOC Using Hysteresis Stator Flux Controllers for IM

“…In the synchronous rotating reference frame (d, q), the IM electromagnetic torque could be given by one of the following equalities [1]:…”

“…The Induction Motors (IM) vector control (VC) is based on dynamic model. Thus, not only magnitude and frequency but also instantaneous positions of the different electromagnetic quantities are controlled [1]. This qualifies VC to be used in IM high performances applications [2][3][4].…”

“…Practically, Rotor FOC (RFOC) and DTC remain the most widely used VC techniques in high performances IMs torque drive [1]. Thereby, several comparisons between DTC and RFOC strategies have been emerged [15][16][17][18][19][20][21].…”

“…Moreover, several researchers consider that the RFOC must always be performed through current controllers. This is the reason why the majority of them note that the RFOC always needs: (i) inner currents loops; (ii) presents slow torque dynamic and (iii) introduces a Pulse Width Modulation (PWM) block [1,22].…”

“…From our point of view, these comparisons are not rigorous: (1). First, it will be more reasonable to consider Direct RFOC (DRFOC) instead of IRFOC when comparing with the DTC.…”