Predictive torque control of induction machine with an adaptive observer for trajectory planning of servo press

In order to improve the accuracy of trajectory planning, servo-drive of induction machine was employed in press. The crank mechanism is widely used as the critical transmission of the press. Dynamic model of press was established through Lagrange Equation and computed torque control method was chosen to solve the nonlinearity problem. To delivering better dynamic performance and reduce the cost of encoder, a predictive torque control of induction machine with an adaptive observer is also proposed in this scheme. The simulation shows the new algorithm can help servo-drive track the trajectory of crank and the performance of new strategy is better than traditional method. It can extent the new possible solution of trajectory for nonlinearity.