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Vol. 176, Issue 8, August 2014, pp. 296-305

 

Bullet

 

An Improved Rotary Interpolation Based on FPGA
 

* Mingyu Gao, Jiaxiang Lou, Zhanxiong Wu, Jilong Ye

1 Hangzhou Dianzi University, Hangzhou, 310018, China
2 E-mail: mackgao@hdu.edu.cn

 

 

Received: 21 May 2014 /Accepted: 31 July 2014 /Published: 31 August 2014

Digital Sensors and Sensor Sysstems

 

Abstract: This paper presents an improved rotary interpolation algorithm, which consists of a standard curve interpolation module and a rotary process module. Compared to the conventional rotary interpolation algorithms, the proposed rotary interpolation algorithm is simpler and more efficient. The proposed algorithm was realized on a FPGA with Verilog HDL language, and simulated by the ModelSim software, and finally verified on a two-axis CNC lathe, which uses rotary ellipse and rotary parabolic as an example. According to the theoretical analysis and practical process validation, the algorithm has the following advantages: firstly, less arithmetic items is conducive for interpolation operation; and secondly the computing time is only two clock cycles of the FPGA. Simulations and actual tests have proved that the high accuracy and efficiency of the algorithm, which shows that it is highly suited for real-time applications.

 

Keywords: Rotation, Interpolation, FPGA, CNC.

 

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