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The direct-error-compensation method of measuring the error of a six-freedom-degree parallel mechanism CMM

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 2002年第1-3期129卷 574-578页

作者： Meng, Z Che, RS Huang, QC Yu, ZJ Harbin Inst Technol Discipline Instrumentat Sci & Technol Harbin 150001 Peoples R China

A six-freedom-degree parallel mechanism CMM is designed. It has some characteristic, such as good system rigidity, rapid motion velocity, not-accumulative error, and a flexible end position stance. The errors influencing the probe position stance are analysed: they are original error of the machine, the process error for measuring, and other stochastic errors. Amongst them, the original error of the machine is the main factor causing probe error. Probe error influences directly the measuring precision of the six-freedom-degree parallel mechanism CMM. A coordinate system for analyzing the position is set-up and its position reverse solution model is obtained. Based on the position reverse solution model and according to matrix complete differential-coefficient theory, the relationship between the original machine error and the probe position stance error is deducted. and the error model is built. Creating a program in the Matlab language to calculate the error model, the position stance error of the probe is obtained under the condition of determinate machine error. Using this result to correct the probe position stance, namely the direct-error-compensation method, can clearly improve the measurement precision. The theory and flow chart of this method are introduced in the paper. (C) 2002 Elsevier Science B.V. All rights reserved.

关键词： coordinate measuring machine (CMM) six-freedom-degree parallel mechanism CMM error models position-stance error direct-error-compensation method

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The direct-error-compensation method of measuring the error of a six-freedom-degree parallel mechanism CMM

The direct-error-compensation method of measuring the error ...

引用

10th International Manufacturing Conference in China (IMCC 2002)

作者： Meng, Z Che, RS Huang, QC Yu, ZJ Harbin Inst Technol Discipline Instrumentat Sci & Technol Harbin 150001 Peoples R China

关键词： coordinate measuring machine (CMM) six-freedom-degree parallel mechanism CMM error models position-stance error direct-error-compensation method

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