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<span>In this research paper we investigate the modelling and control of a doubly fed induction generator (DFIG) driven in rotation by wind turbine, the control objectives is to optimize capture wind, extract the maximum of the power generated to the grid using MPPT algorithm (Maximum Power Point Tracking) and have a specified reactive power generated whatever wind speed variable, the indirect field oriented control IFOC with the PI correctors was used to achieve such as decoupled control. To validate the dynamique performance of our controller the whole system was simulated using dSPACE DS1104 Controller board Real Time Interface (RTI) which runs in Simulink/MATLAB software and ControlDesk 4.2 graphical interfaces.</span>

In this paper, a second-order sliding mode (SOSM) disturbance observer will be designed and implemented for a single link manipulator using Ds1104. The target system model is derived via the expression of the Lagrange equations of movement based on an energy approach. The flexible link is a clamped-free Euler-Bernoulli beam, and the assumed modes method is used to approximate the elastic movement. The proposed observer is meant to estimate the single-link flexible manipulator state, and the equivalent output injection method is applied to reconstruct the determinist unknown time varying disturbance. To appraise the performance of the proposed strategy, the observer is implemented using dSPACE DS1104 Controller board Real-Time Interface (RTI) running under MATLAB/Simulink software and ControlDesk 4.2 graphical interface. The illustrated results, either of the simulation or the experimental setting up, show that the proposed strategy provides finite time and robust estimation of single link nonlinear flexible manipulator state. Furthermore, the observer gives with accuracy the reconstruction of external perturbation.

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