Error Averaging Effect in Parallel Mechanism Coordinate Measuring Machine
AbstractError averaging effect is one of the advantages of a parallel mechanism when individual errors are relatively large. However, further investigation is necessary to clarify the evidence with mathematical analysis and experiment. In the developed parallel coordinate measuring machine (PCMM), which is based on three pairs of prismatic-universal-universal joints (3-PUU), error averaging mechanism was investigated and is analyzed in this report. Firstly, the error transfer coefficients of various errors in the PCMM were studied based on the established error transfer model. It can be shown how the various original errors in the parallel mechanism are averaged and reduced. Secondly, experimental measurements were carried out, including angular errors and straightness errors of three moving sliders. Lastly, solving the inverse kinematics by numerical method of iteration, it can be seen that the final measuring errors of the moving platform of PCMM can be reduced by the error averaging effect in comparison with the attributed geometric errors of three moving slides. This study reveals the significance of the error averaging effect for a PCMM. View Full-Text
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Hu, P.-H.; Yu, C.-W.; Fan, K.-C.; Dang, X.-M.; Li, R.-J. Error Averaging Effect in Parallel Mechanism Coordinate Measuring Machine. Appl. Sci. 2016, 6, 383.
Hu P-H, Yu C-W, Fan K-C, Dang X-M, Li R-J. Error Averaging Effect in Parallel Mechanism Coordinate Measuring Machine. Applied Sciences. 2016; 6(12):383.Chicago/Turabian Style
Hu, Peng-Hao; Yu, Chang-Wei; Fan, Kuang-Chao; Dang, Xue-Ming; Li, Rui-Jun. 2016. "Error Averaging Effect in Parallel Mechanism Coordinate Measuring Machine." Appl. Sci. 6, no. 12: 383.
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