Title :
A model-referenced adaptive control strategy for improving contour accuracy of multi-axis machine tools
Author :
Chuang, Hua-Yi ; Liu, Chang-Huan
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan
Abstract :
A model-referenced adaptive control strategy combined with cross-coupled control of axial motion that is intended to improve contouring performance of multi-axis computer numerically controlled machine tools is discussed. A feedback control loop is established between the desired input feedrate and the output contour error. By specifying a contour error bound, the desired feed rate is adaptively adjusted online so that the resultant contour accuracy can be maintained within the specified bound. The development of an experimental positioning system for implementing the proposed control strategy is described. Experimental work on this system shows the effectiveness of the method.<>
Keywords :
computerised numerical control; feedback; machine tools; model reference adaptive control systems; axial motion; computer numerically controlled machine tools; contour accuracy; contour error bound; cross-coupled control; feedback control loop; model-referenced adaptive control strategy; multi-axis machine tools; positioning system; Adaptive control; Computer errors; Computer numerical control; Control systems; Error correction; Feedback loop; Machine tools; Machining; Motion control; Servomechanisms;
Conference_Titel :
Industry Applications Society Annual Meeting, 1990., Conference Record of the 1990 IEEE
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-87942-553-9
DOI :
10.1109/IAS.1990.152390
