Speed Control of Linear Feed System Based on Feedforward and Pole Placement

Permanent magnet linear synchronous motors (PMLSM) is a multi-variable, strong coupling, nonlinear complex system. As a result, the design of an appropriate controller on dynamic performance of PMLSM is very important. In this paper, a feedforward controller based on pole-placement design strategy is proposed to improve the dynamic performance by increasing the speed response while reducing steady state errors. The parameters which influence the dynamic characteristic of the system were discussed. The dynamic response and disturbance rejection ability for linear feed system were verified by the experiments. Finally the control performance of pole-placement and PID was compared.