Intelligent NURBS Interpolator Based on the Adaptive Feedrate Control

To satisfy the need for high-speed and high-accuracy machining of NURBS curve. Firstly the form of NURBS curve is analyzed and Talor's expansion of the parameter u with respect to time t is used to obtain the algorithm of the first order approximation interpolation. Secondly, based on the algorithm of the controlled chord error interpolator, an intelligent interpolation algorithm of the adaptive feedrate control is proposed. According to the actual machining capacity of machine tools, this algorithm uses look-ahead method, which dispenses with the complicated computation of the end point estimation of NURBS curve, to analyze the curve segment required by the maximum deceleration distance. Thus, the feedrate could decrease in advance and vary with the curvature and the variation ratio of curvature, which makes machining motion quite smooth. Not only could high accuracy and frne surface quality be achieved during high-speed machining, but also the overload of cutter tools is avoided on corners. Finally, in order to facilitate the calculation of interpolation, the dynamic matrix representation and efficient algorithm of curvature computation of the NURBS curve are presented.

作 者： Zhang Deli Zhou Laishui   作者單位： College of Mechanical and Electrical Engineering, Nanjing University of 4eronautics and Astronautics, Nanjing 210016, China  刊 名： 中國(guó)航空學(xué)報(bào)（英文版）  ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS  年，卷(期)： 2007 20(5)  分類號(hào)： V2  關(guān)鍵詞： CNC   NURBS curve   interpolation   high-speed machining  

【Intelligent NURBS Interpolator Based】相關(guān)文章：

NURBS輪廓的數(shù)控編程探討04-26

Adapting Non-Task-Based Materials to Fit a Task-Based Framework04-27

Physically based simulation of Buddha Glory04-26

Temperature and precipitation in Mongolia based on dendroclimatic investigations04-27

Occupant evacuation model based on cellular automata in fire04-27

Adaptive Impedance-controlled Manipulator Based on Collision Detection04-26

Weight measurement using image-based pose analysis04-26

Urban flood control strategy based on new relationship of human and flood04-26

Research on Contribution of Phosphate-based Detergent to Municipal Sewage in Beijing04-26

Approach to Generalized Synchronization with Application to Chaos-Based Secure Communication04-27