標題: The speed-controlled interpolator for machining parametric curves
作者: Yeh, SS
Hsu, PL
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: parametric curve;CNC interpolators;speed accuracy;NURBS
公開日期: 30-四月-1999
摘要: Modern CNC systems are designed with the function of machining arbitrary parametric curves to save massive data communication between CAD/CAM and CNC systems and improve their machining quality. Although available CNC interpolators for parametric curves generally achieve contouring position accuracy, the specified feedrate, which dominates the quality of the machining processes, is not guaranteed during motion. Recently, some approximation results concerning motion speed have been reported [Shpitalni M, Koren Y, Lo CC. Computer-Aided Design 1994;26(11):832-838; Bedi S, Ali I, Quan N. Trans ASME J Engng Industry 1993;115:329-336; Chou JJ, Yang DCH. Trans. ASME J Engng Industry 1991;113:305-310; Chou JJ, Yang DCH. Trans ASME J Engng Industry 1992;114:15-22]. In this paper, by deriving a compensatory parameter, the proposed interpolation algorithm has significantly improved curve speed accuracy. In real applications, the proposed algorithm results in: (1) constant speed: and (2) specified acceleration and deceleration (ACC/DEC) to meet the feedrate commands. The motion accuracy and feasibility of the present interpolator have been verified with a provided non-uniform rational B-spline (NURBS) example. (C) 1999 Elsevier Science Ltd. Ail rights reserved.
URI: http://dx.doi.org/10.1016/S0010-4485(99)00035-4
http://hdl.handle.net/11536/31387
ISSN: 0010-4485
DOI: 10.1016/S0010-4485(99)00035-4
期刊: COMPUTER-AIDED DESIGN
Volume: 31
Issue: 5
起始頁: 349
結束頁: 357
顯示於類別:期刊論文


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  1. 000081364400004.pdf