Improved Motion Control on an Arbitrary CurveUsing Newton Interpolation Polynomial
| Autor: | Wei-Cheng Hong, 洪瑋成 |
|---|---|
| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 The motion control card is often discussed in CNC machines category because it involves many planning of motion trajectory and control theory. The process method of traditional CNC machines interpolator can only support linear and circular interpolations to compel CAD/CAM planning process path utilize linear and circular interpolations mostly. Traditional interpolator becomes out-of-date because of increasingly complex model, higher speed and better precision. As the interpolation line segment makes the acceleration/deceleration so frequent that motor can not reach the set speed. Traditionally, it be use to make the line close to the original curve and shape. But for such complex curves, preserving a better precision for the process brings out a huge interpolator command, leading to the exceeding-load program and the overloading computer memory. In order to solve mentioned problems above, this study is aiming at researching the process and methods of the interpolation in motion control card. Also, we will discuss extrapolation and interpolation of the numerical methods that improve arbitrary curve in the path error of the traditional trajectory planning. This paper utilizes the parameter curve that represents arbitrary curve and calculates position command into the interpolator with numerical methods of MATLAB. Thus Accordingly, this way can reduce the problems of the traditional interpolation and control curve motion directly, leading more to precision and higher speed of the trajectory path. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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