Research And Design Of Digital Control Machine System Interpolation Algorithm

This paper first focuses on the interpolation algorithm—Use comparative law point by point and DDA act to achieve straight line and circular interpolation, conduct a four-quadrant graphical simulation and analysis, and summary of the laws of the different quadrants of the interpolation. Introduce four methods to reduce errors when carrying out the interpolation of DDA act, method one---using method of reducing pulse equivalent to achieve graphic simulation, confirm the feasibility of this approach. In addition, the paper introduce a very popular data sampling interpolation algorithm- NURBS interpolation algorithm, and use various methods to achieve NURBS curve interpolation, used the method of uniform changes in the parameters, the constant speed method. The design of the simulation program and image analysis is implemented in the analysis of various algorithms. Several special methods are used to analyze the changes in acceleration and deceleration, the advanced methods of the S-type acceleration and deceleration. Finally, I completed the error analysis of data sampling method at the end of algorithm.In this paper, the design of hardware circuit based on researching and analyzing algorithm, using FPGA to design interpolation circuit. The experiment choose EP2C35F672C8 chip of ALTREA companies to achieve, combine the characteristics of the chip to achieve the peripheral hardware circuit design and the internal design of interpolation module, focused on the design of the internal modules, combined the case-by-point comparison method, the features of digital integration method and the characteristic of digital circuit, to achieve two classic interpolation method, then complete the image Simulation of this design. In addition, the rate of change should be considered when doing the design of accurate interpolation and graphic simulation, add the acceleration and deceleration speed changes to the hardware design.