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Design and implementation of command and friction feedforward control for CNC motion controllers

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3 Author(s)
Tsai, M.-C. ; Dept. of Mech. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan ; Chiu, I.-F. ; Cheng, M.-Y.

Motion controllers play a pivotal role in the development of high-performance CNC machines. Precision motion control is achieved with a control structure employing S-curve motion planning on the velocity command before interpolation, command feedforward and friction feedforward compensation. To evaluate the performance of the proposed control scheme, a servomechanism is controlled to track a circular curve in the form of nonuniform rational B-splines, where the desired motion information such as velocity and acceleration are also provided. Experimental results indicate that the proposed motion-control structure exhibits a better performance, when compared with conventional motion-control schemes.

Published in:

Control Theory and Applications, IEE Proceedings -  (Volume:151 ,  Issue: 1 )

Date of Publication:

17 Jan. 2004

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