For several years now, modern aircraft design has been based on a "More Electric" philosophy. The latter is a concept of great interest to the aerospace industry as it allows the overall efficiency of aircraft to be increased while ensuring a perfect balance between safety and reliability. The thesis work presented is based on the study of an electro-mechanical actuator (EMA) which represents an innovative solution for replacing the electro-hydraulic actuators (EHA) widely used in the aerospace industry. In fact, simultaneously with the development of the "More Electric" project philosophy, there has been increasing interest in the study of EMAs and their use as actuation systems for flight controls.