Browsing by Author "Benalla, H."

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Nonlinear integral backstepping control for induction motors
    (İstanbul - Turkey, 2011) Mehazzem, F.; Nemmour, A.L; Benalla, H.
    A novel structure of nonlinear integral backstepping control has been proposed for induction motors. We can see clearly that the structure of the controller generated by the classical version of backstepping is composed of a proportional action, which was added a derivative action on errors. Such a structure makes the system sensitive to measurement noise. The lack of integration means also the appearance of a constant static error, caused mainly by non-zero mean disturbances. The solution t o this p roblem i s to d esign a n ew v ersion of the backstepping with integral action. By using the proposed integral backstepping controller, the system has a better load disturbance rejection capability. The effectiveness of this proposed control structure is verified by simulation as well as by experiment under critical disturbance conditions.
  • No Thumbnail Available
    Item
    Online rotor resistance estimation based on MRAS sliding mode observer for induction motors
    (IEEE, 2013) Mehazzem, F.; Reama, A.; Mehazzem, F.; Benalla, H.
    This paper deals with rotor resistance estimation for induction motors drives purpose. A novel MRAS structure for rotor resistance adaptation is proposed. It is based mainly on the use of a very robust sliding mode flux observer as reference model, which gives robustness to the whole parameter estimation operation. Unlike to classical MRAS structure, based on the use of pure integrators, which have initial value and drift problems. By using the proposed MRAS-Sliding mode observer, system has a better performance and robustness. Effectiveness of this proposed estimation structure is verified by experiment under critical disturbance conditions.