计算机工程与应用 ›› 2014, Vol. 50 ›› Issue (6): 46-50.

• 理论研究、研发设计 • 上一篇    下一篇

基于趋势外推法曲线智能延伸模型及实例应用

杨国太,刘有余   

  1. 安徽工程大学 先进数控和伺服驱动技术安徽省重点实验室,安徽 芜湖 241000
  • 出版日期:2014-03-15 发布日期:2015-05-12

Intelligent extension models and their applications for non-circular curves based on trend extrapolation

YANG Guotai, LIU Youyu   

  1. Anhui Key Lab of Advanced NC & Servo Technology, Anhui Polytechnic University, Wuhu, Anhui 241000, China
  • Online:2014-03-15 Published:2015-05-12

摘要: 为解决众多CAD软件不具备非圆曲线延伸功能,引入趋势外推原理,研究非圆曲线智能延伸技术。建立了二次和三次多项式曲线延伸、指数曲线延伸、戈珀兹曲线延伸三类智能延伸模型,分别给出趋势外推模型的识别与选择方法,可据曲线特征点合理选用。提供了智能延伸实例,阐述了智能延伸的步骤及方法,分析了它们的延伸精度,指出模型使用范围。解决了CAD软件共性核心难题,可应用于现有CAD软件的核心升级或二次开发,以增加或完善非圆曲线延伸功能。

关键词: 非圆曲线, 趋势外推法, 智能延伸, 数学模型

Abstract: Lots of CAD software has no function of extension for non-circular curves. Intelligent extension-technology for non-circular curves is studied based on the principles of trend extrapolation. Four kinds of intelligent extension-models, including quadratic extension-model, cubic extension-model, exponential extension-model and Gompertz extension-model, are built. Moreover, the methods of identifying and choosing extension-models are discussed separately. Several applications of intelligent extension for non-circular curves are offered, which shows us that the extension-models can be available for approximate extension for a short distance if the shapes of non-circular curves are arbitrary. The theories in this paper, a kind of core technologies and generic key problems, can be used for upgrading or secondary development of existing CAD software.

Key words: non-circular curves, trend extrapolation, intelligent extension, mathematical models