Larbi Chrifi-Alaoui

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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)
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 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)
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)
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)
In this paper, a new second order sliding mode control (SOSMC) for coupled (multi-input multi-output) MIMO nonlinear system is presented , the proposed method can be applied to a large class of nonlinear coupled MIMO processes affected by parameters uncertainties and disturbances. This algorithm are implemented on the three tanks test-bed system and the(More)
This paper, deals with a new input-output sliding mode linearization control for induction motor combined with field oriented control (FOC). To control the speed and rotor flux modulus, we develop two loops. The first one, inner loop, allows to linearize the system by a choose of closed loop poles to achieve a good linearization. The choice of a particular(More)
The performance of a photovoltaic (PV) array is affected by temperature, solar insolation, shading and faults in PV array. Fault analysis in photovoltaic (PV) system is a fundamental task to protect PV panels from damage and to reduce risks of security hazards. In this context, this paper presents a MATLAB-based modeling and simulation scheme adapted for(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)