Larbi Chrifi-Alaoui

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This paper deals with a Sensorless backstepping controller. In order to improve the robustness of the proposed approach, we estimate the rotor flux components and rotor speed of the induction motor using a sliding mode observer. The backstepping technique is appropriate for such as non linear system. The overall system stability is proved through(More)
In this paper, a solution is proposed in order to solve the chattering avoidance problem in variable structure control for a class of uncertain non linear systems with external disturbances. This approach is based on Sliding Mode Control (SMC) with integral corrector in the boundary layer to synthesize a robust control system. The stability and the(More)
In this paper, the nonlinear Sliding Mode Control (SMC) with varying boundary layers is implemented to improve the tracking performance of a nonlinear system. The key feature of the control scheme is the use of varying boundary layers instead of fixed boundary layers, which are usually employed in conventional SMC. The experimental results strongly suggest(More)
This paper presents a robust voltage control intended for a photovoltaic system, the main objectives of the proposed control is to adapt with the parameter variations and load disturbances. Second order sliding mode controller, based on super twisting algorithm for DC-DC Buck converter is proposed. Applying SOSMC can improve the transient response of the(More)
In this paper, the nonlinear sliding mode control (SMC) with mismatch disturbances is proposed. We treat the problem of control with this class of disturbances and the chattering phenomena. The proposed method attenuates the effect of both uncertainties, external disturbances and eliminates the chattering phenomenon introduced by classical sliding mode(More)
A robust voltage control intended for a photovoltaic systems is considered. The proposed controller is robust to environment changes and load variations. In this paper, the second order sliding mode controller based on super twisting algorithm for DC-DC Boost converter is proposed for increases the robustness of the global system. The designed control is(More)
This paper presents advanced power management strategy for a stand-alone hybrid power system. The proposed system consists of a photovoltaic panel, Proton exchange membrane fuel cell and a battery-electrolyzer-super capacitor energy storage system. All the system components are connected to the same DC voltage bus through appropriate Dc-Dc power converters(More)
This paper propose a second-order sliding-mode observer for sensorless control of a permanent magnet synchronous motor. The corresponding observer is used to estimate the rotor speed. Simulation results are shown to confirm the effectiveness of the proposed method.
The performance of a 1.5 MVA wind-power doubly fed induction generator (DFIG) under network fault is studied using simulator developed in MATLAB-Simulink. The simulator consists of the DFIG analytical model, the detailed frequency converter model including passive crowbar protection, and model of the transformer. Simulation results show the transient(More)