Abstract:With the improvement of the reliability of NC machine tools, it is becoming more and more difficult to obtain a large number of fault data. To deal with this problem, the improved Bootstrap sampling method is proposed. The failure data, which is gained by using seven a type of NC machine tools to monitor failure data for half year, is used respectively for the improved Bootstrap sampling method and the classic series research method. The results have been analyzed and calculated, and

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... ow that the Bootstrap sampling method's relative error is obviously lower than the classic series research method's. The improved Bootstrap sampling method is proved to be feasible in reliability modeling.