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| Analysis and Compensation of the Nonlinear Error Based on Contact Surface Profil Measurement |
| SUN Yan-ling1,2,CHANG Su-ping3 |
1. Hubei University of Arts and Science, Xiangyang, Hubei 441053, China;
2. The Co-Innovation Center of Hubei Province of Auto Parts Manufacture Rquipment Digitizing, Xiangyang, Hubei 440153, China;
3. Huazhong University of Science and Technology, Wuhan, Hubei 430074, China |
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Abstract A circular path is produced by measuring stylus rotating with the lever axle, and the horizontal deviation affects the accuracy of surface profile measurements. Based on the improvement of traditional measuring rod, the mathematical model of non-linear measurement error and the compensation algorithm of polynomial fitting error are derived. The method of calculating error compensation parameters by fitting a standard ball is proposed. For a spherical cap of 79.505 3 mm radius, experimental results shown that the size of the radius error is less than 1 μm, the effect of the compensation is better.
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Received: 18 November 2014
Published: 14 October 2016
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2016, Vol. 37 
