Sensorless control research for linear induction motor based on sliding mode observer in electromagnetic aircraft launch system

This paper introduced the linear induction motor used in electromagnetic aircraft launch system. With the development of technology, the linear induction motor was put forward higher requirement for electromagnetic aircraft launch system. The velocity sensor was the key component of linear induction motor control system, which affected the control accuracy and dynamic performance. In this paper, the mathematical model of linear induction motor was set up, and a new sensorless control method using the sliding mode observer with improved integral surface was proposed, in order to reduce the steady state error and chatting, and suppress the integral saturation. Then, the mover position of linear induction motor was compensated. In the last, the simulation model was built, and the validity of proposed sensorless control strategy was verified.