Robust positional control with an induction actuator by using a PID controller associated with field orientation

A robust digital positional control system is presented for small power induction actuators. A simple control algorithm is obtained by performing field orientation through an estimated linearizing state feedback, avoiding any measurement or estimation of the rotor flux. The hardware implementation is organized around two 8-b microcontrollers and needs only a digital position encoder as the sensor. The good performance of the system has been validated by simulation and experiments on a laboratory prototype.