Title :
Variable structure control of AC servomotors for performance improvement in CNC applications
Author :
Yonesoon Fun ; Kim, Jung-Ho ; Cho, Dong-il Dan
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
A variable structure controller is developed for AC servomotors used in computer-numerical-controlled (CNC) milling machines. The controller designed is implemented as an outer loop controller to a factory designed motor servo-pack system. The variable structure controller is designed for a fast response when the speed tracking error is large, and for small oscillations when the speed tracking error is small. The controller designed is installed on a CNC milling machine using a PC, and milling experiments were performed. The results show improved performance over the factory-designed controller
Keywords :
AC motors; angular velocity control; closed loop systems; machine tools; machining; servomotors; tracking; variable structure systems; AC servomotors; CNC milling machines; closed loop system; computerised numerical control; outer loop controller; sliding mode; speed control; speed tracking error; variable structure control; AC motors; Automatic control; Computer numerical control; Control systems; DC motors; Electric variables control; Proportional control; Servomechanisms; Servomotors; Synchronous motors;
Conference_Titel :
Industrial Technology, 1996. (ICIT '96), Proceedings of The IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-3104-4
DOI :
10.1109/ICIT.1996.601657
