【正文】 but most of the economic type CNC machine tools can only linear interpolation and circular interpolation, parabolic interpolation function without. Existing literature on the straight line, arcbypoint parison of interpolation, integral interpolation method are introduced, and its still rare for parabolic interpolation. This paper introduces two parabolic interpolation algorithm, and then vb language design based on a parabolic interpolation software can be used in teaching simulation. Keywords: interpolation, parabolic, point by point parison, digital integration, simulation, interpolation software 中北大學分校畢業(yè)設計（論文） 2 目錄 1 緒論 ......................................................................................................................................4 引言 ...........................................................................................................................4 插補技術 ...................................................................................................................4 國內外技術現(xiàn)狀 .......................................................................................................5 國外技術現(xiàn)狀 ................................................................................................6 國內技術現(xiàn)狀 ................................................................................................6 課題意義 ...................................................................................................................6 本章小結 ...................................................................................................................7 2 數(shù)控系統(tǒng)插補方法及其分析 ..............................................................................................7 插補概述 ...................................................................................................................7 基準脈沖插補法 .......................................................................................................8 逐點比較法插補的基本原理 ........................................................................8 數(shù)字積分法插補的基本原理 ........................................................................9 3 拋物線插補 .......................................................................................................................11 逐點比較插補法拋物線插補 .................................................................................11 逐點比較插補法拋物線插補原理 .............................................................11 逐點比較插補法拋物線插補運算過程 ......................................................12 逐點比較插補法拋物線 插補實例 ..............................................................13 4 用 Visual Basic 實現(xiàn)拋物線逐點比較法插補 ..................................................................15 插補流程圖 .............................................................................................................15 編程變量定義 .........................................................................................................15 部分 vb 程序 ...........................................................................................................16 插補軟件界面及仿真 .............................................................................................17 5 數(shù)字積分拋物線插補 ........................................................................................................18 拋物線 DDA 插補算法原理 .................................................................................18 拋物線 DDA 插補實例 .........................................................................................20 6 用 Visual Basic 實現(xiàn)拋物線積分法插補 ..........................................................................22 插補流程圖 .............................................................................................................22 中北大學分校畢業(yè)設計（論文） 3 編程變量定義 ...