Certified space curve fitting and trajectory planning for CNC machining with cubic B-splines
Certified space curve fitting and trajectory planning for CNC machining with cubic B-splines
复制标题
使用三次 B 样条进行 CNC 加工的经过认证的空间曲线拟合和轨迹规划
DOI:
10.1016/j.cad.2018.08.001
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发表时间:
2019-01
影响因子:
4.3
通讯作者:
Mi Zhenpeng
中科院分区:
文献类型:
--
作者:
Lin Fengming;Shen Li-Yong;Yuan Chun-Ming;Mi Zhenpeng
In CNC machining, the tool path following G01 codes generally introduces large computations and inherent discontinuities. A common way to avoid these shortcomings is fitting the G01 polyline with a parametric curve and then scheduling the feedrate along the fitted curve. However, curve fitting with confined error in three dimensional space is nontrivial since the Hausdorff distance between a space G01 segment and a rational parametric curve segment is difficult to formulate. In this paper, we derive the explicit expression for the Hausdorff distance between a line segment and a curve segment, and then propose a curve fitting algorithm for G01 polylines. Instead of the traditional two-stage model, we present a combined trajectory planning model with error constraints as well as dynamic constraints. Moreover, an effective and efficient algorithm is designed to solve this model. Experimental results are provided to illustrate and clarify our methods. (C) 2018 Elsevier Ltd. All rights reserved.
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DOI:
10.1016/0146-664x(80)90040-4
发表时间:
1980-10
期刊:
Computer Graphics and Image Processing
影响因子:
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作者:
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通讯作者:
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2013-06
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影响因子:
2.1
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发表时间:
2008-04
期刊:
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影响因子:
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通讯作者:
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DOI:
10.1016/j.cad.2007.04.003
发表时间:
2007-10
期刊:
Comput. Aided Des.
影响因子:
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作者:
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通讯作者:
Nan Wang;K. Tang