C the vibration of the rolling bearing performance data

C the vibration of the rolling bearing performance data: according to the improved Huber M method to sort on the experimental data, the first to find the median, compute the mean value and variance of the original data. Rolling bearing 4 and 2 in the same order of magnitude of median, mean, variance, performance is similar, but in the maximum and the minimum of vibration value as you can see, the bearing 2 discrete one order of magnitude, the performance is similar, but in the maximum and the minimum of vibration value as you can see, the sex far more than the bearing 4 large discreteness, four stability is superior to the performance of bearing bearing 2: bearing 1 and 3, the value of median, mean value, variance significantly larger, and the minimum maximum bearing vibration value is bigger also, shows that compared to bearing bearing 1, 3, 4, 2, evident in bearing the maximum and minimum value of 3 big an order of magnitude, and the average value is very small, shows that the vibration of the bearing 3 numerical obvious deviation from the median, its performance is the most unstable vibration. According to above analysis result, bearing performance, are given for reference only. Can be seen from the above analysis, the bearing vibration data of the median and mean not equal, but in the same order of magnitude, existing in vibration data part variation data, at the same time bearing vibration has obvious phenomenon of discrete data. In order to reduce the effects of discrete numerical value to the overall performance, experimental data have to be steady. For this, put forward combining the median and Huber M method of sound mind, sound treatment on bearing vibration experiment data, in order to further analysis of the rolling bearing vibration performance. D; Is to improve the data sequence of collating sequence of absolute value of mean and median absolute difference, robustness, and can reflect the new data with the original data as shown in figure 4 6. Figure, the abscissa for significance level; Ordinate for Di, the unit is um/s.