Based on probability and statistic, a design method of precision cam profile concerning the influence of random processing errors is advanced. Combining the design with the process, which can be used to predict that cam profiles will be successfully processed or not in the design stage, design of the cam can be done by balancing the economization and reliability. In addition, an fuzzy deduction method based on Bayers formula is advanced to estimate processing reasonable of the designed precision cam profile, and it take few samples.
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