Stochastic error analysis in cam mechanisms |
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Authors: | HR Kim |
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Affiliation: | a Department of Mechanical Engineering, McMaster University, Hamilton, Ontario L8.S 4L7, Canada |
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Abstract: | A probabilistic method is outlined for obtaining the variances in displacement, velocity and acceleration of followers in cam mechanisms for any given manufacturing tolerance on the cam profile. A follower motion equation is obtained by expansion in a Taylor series and considered in both linear and second-order terms. The equation is analyzed with random variables for the kinematic displacement, velocity and acceleration of the follower employing stochiastic techniques including finite differences and the maximum likelihood method. A general computer program allows the designer to obtain projected output errors for any commonly used disc cam type, and an example of one of these is included. |
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