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Needle roller bearing robustness analysis of the experimental data
by：Waxing
2020-06-17
Needle roller bearing experiment data robustness analysis: according to the modern statistical hypothesis, the ideal of rolling bearing vibration performance data should be subject to normal distribution.
Therefore, when the data does not obey normal distribution or deviating from the normal distribution is far, think rolling bearing vibration performance change.
The following analysis of rolling bearing vibration frequency distribution of performance data, the results are shown in figure 7
2.
According to the figure 7 -
Two different time periods in the rolling bearing vibration frequency histogram can be seen that different time stages, rolling bearing vibration data in May, some shows bimodal;
Sometimes left, sometimes right.
The diversity and complexity of the actual performance of rolling bearing vibration that data does not obey the normal distribution.
The further analysis of rolling bearing vibration data with normal distribution, the results are shown in figure 7
3.
According to the figure 7 -
3 you can see that the rolling bearing vibration performance data in the smaller and larger data values deviate from normal distribution.
Specific characteristics of upper, lower;
Some smaller data more, some less smaller data;
Some larger data more, some less large data.
The complexity of variety, present variation.
Visible, rolling bearing vibration performance data is discrete, from the Angle of the rolling bearing performance degradation, is bearing performance variation, the variation of the following data for analysis.
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