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《Journal of Lanzhou University of Technology》 2010-02
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Reliability analysis of mechanism motion based on both wear of a kinematic pair and its original error

TONG Chang-hong1,2,HUANG Jian-long1,HU Yu-xia2(1.College of Mechano-Electronic Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China;2.Institute of Mechanical Detection and Fault Diagnosis,Lanzhou City University,Lanzhou 730070,China)  
A model for calculating the wearing capacity of kinematic pair δw=kpvt was established on the basis of summarizing the wear theories and research results available.The contact pressure and relative velocity of the pair element in any position were calculated by analyzing kinematics and kinetics of the mechanism.The reliability model of motion accuracy for the mechanism was set up based on two assumptions that the pair elements kept continually contacting and all of the random factors obey normal distribution.An actual computation with the established model was performed by using a developed MATLAB program,so that an important conclusion was obtained that the influence of wear on the reliability of motion accuracy of a mechanism would be ever-obvious along with the service time.The reliability of motion accuracy could be estimated with the established model and,oppositely,its service life could be predicted according to a given motion accuracy of the pair after some service period by using the investigation conclusion.
【Fund】: 甘肃省教育厅基金(2006A010)
【CateGory Index】: TH112.1
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