The Accuracy Analysis of Error Separation for Two-point Separating Technique Method of Time Domain and Frequency Domain
MU De-qian · Modular Machine Tool & Automatic Manufacturing Technique · 2014
In order to analysis the principle of error and the principle error's regularity and characteristics in the two point error separation method of time domain and frequency domain. Established a part model to march the error separation,through the analysis of different influence factors found the principle error's regularity and characteristics of two point method error separation technique,and compared the accuracy of two kinds of error separation technique. Using two kinds of error separation technique and roundness measuring instrument to measure the same parts,found that the experiment results and the results of simulation agree with the analysis of theory. So we can draw the conclusions: When the number of Samples—N expand 1times,the ratio of the absolute error of the parameter value is getting closer to 2; with facing mounting the two sensors,the results of two point separation error is the smallest.;with same sampling parameters,the precision of error separation technique in frequency domain method is higher than error separation technique in time- domain method.