Title :
A model-referenced adaptive control strategy for improving contour accuracy of multiaxis machine tools
Author :
Chuang, Hua-Yi ; Liu, Chang-Huan
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan
Abstract :
To improve the contouring performance of multiaxis computer numerically controlled machine tools, a model-referenced adaptive control strategy, combined with cross-coupled control of axial motion, is proposed. A feedback control loop is established between the desired input feedrate an the output contour error. By specifying a contour error bound, the desired feedrate is adaptively adjusted so that the resultant contour accuracy can be maintained within the specified bound. An experimental positioning system was constructed for implementing the control strategy. The experimental work shows the effectiveness of the method
Keywords :
computerised numerical control; machine tools; model reference adaptive control systems; position control; axial motion; computer numerically controlled machine tools; contour accuracy; contour error bound; cross-coupled control; feedback control loop; input feedrate; model-referenced adaptive control; multiaxis machine tools; positioning system; Adaptive control; Automatic control; Computer errors; Computer numerical control; Control systems; Error correction; Machine tools; Machining; Motion control; Servomechanisms;
Journal_Title :
Industry Applications, IEEE Transactions on
