1. Laboratory of Electro-Mechanic Systems (Lasem), National School of Engineers of Sfax (ENIS), University of Sfax, Soukra, Tunisia
2. Department of Science and Technics, Faculty of Science &technology El-Anasser, University Mohamed El Bachir El Ibrahimi De Bordj Bou Arreridj, Bordj Bou Arreridj, Algeria