Approximation Implementation Approach for Gaussian filtering in Roundness Measurement
Gaussian filter acts as the filter for roundness signal processing and a new implementation approach for Gaussian filter is presented. Based on the theory of B-spline function, the variational principle with the tension condition and the convolution characteristic of Gaussian filter with small scale, the approximation filter of Gaussian filter is concluded, which has the amplitude characteristic deviation from Gaussian filter less than 1％ and the zero-phase-shift characteristic. The algorithm for the approximation filter consists of the zero-phase-shift filtering and the weighing filtering which loop two times. The algorithm is both simply in its structure and high in its filtering efficiency. The method of cycle continuation solves the edge effects of digital filtering based on the periodicity of the roundness measurement signal. The approximation filter is also efficient and accurate for the implementation of Gaussian filter in the application of roundness measurement.
Gaussian filter B-spline function Roundness measurement Edge effects
Xu Jingbo Liu Bo Lin Haijun Li Jianxin
College of Measure-control Technology & Communication Engineering,Harbin University of Science and Technology,Harbin 150080 The higher educational key laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province,Harbin 150080
国际会议
The 6th International Forum on Strategic Technology(IFOST 2011)(第六届国际战略技术论坛)
哈尔滨
英文
814-817
2011-08-22（万方平台首次上网日期，不代表论文的发表时间）