JIA Li-de, ZHENG Zi-wen, LI Sheng-yi, et al. Separation and optimization of posture errors in optical aspheric coordinate measurement[J]. Optics and precision engineering, 2007, 15(8): 1229-1234.
JIA Li-de, ZHENG Zi-wen, LI Sheng-yi, et al. Separation and optimization of posture errors in optical aspheric coordinate measurement[J]. Optics and precision engineering, 2007, 15(8): 1229-1234.DOI:
Based on the development of a new special-purpose optical aspheric coordinate measurement machine
the effect of the relative posture errors between the measurement system and the workpiece in 6 degrees was researched
and its mathematical model was established. With a model parameter estimation method
the least square (LS) optimal model was established based on the measuring data and the nominal surface
and then the LS estimations of the posture errors were obtained to correct the measurement result. The experimental results indicate that the method can eliminate the effect of posture errors and increase the reliability and accuracy of the measuring data
which ensures the measurement system in a repeatability of 0.3 μm and an accuracy of 0.5 μm.