ZHANG En-zhong, ZHAO Ji, JI Shi-jun etc. Comprehensive error modeling and compensation for precision polishing platform based on orthogonal experiment and interpolation algorithm[J]. Editorial Office of Optics and Precision Engineering, 2015,23(12): 3422-3429
ZHANG En-zhong, ZHAO Ji, JI Shi-jun etc. Comprehensive error modeling and compensation for precision polishing platform based on orthogonal experiment and interpolation algorithm[J]. Editorial Office of Optics and Precision Engineering, 2015,23(12): 3422-3429 DOI: 10.3788/OPE.20152312.3422.
Comprehensive error modeling and compensation for precision polishing platform based on orthogonal experiment and interpolation algorithm
To improve the machining precision of four-axis polishing platforms
a geometric and thermal comprehensive error model and an error compensation method were researched for a four-axis polishing platform with a float platform and a rotation platform. Several kinds of instruments such as laser interferometer
temperature sensor were used to repeatedly measure and analyze respectively the positioning errors of
X
Z
axes at different temperatures and to verify that different feeding speeds were no significant influence on the positioning error. The change rules of between position error and temperature change for the polishing platform in
X
Z
axes were obtained. Based on orthogonal polynomial and interpolation algorithm
the geometric and thermal comprehensive error model of
X
Z
axes was established. According to the comprehensive error model
the prediction data curves were calculated
and seven groups of experimental data of
X
Z
axes were fitted and the fitting residual error absolute value was verified to be less than 0.2 μm. A compensation experiment was carried out according to the forecasting data. The results show that the
X
axis positioning errors of polishing platform under the normal temperature
the temperature rise of 60 min and steady state are respectively decreased by 89.33%
92.45% and 85.7% after compensation
and the
Z
-axis positioning errors are respectively reduced by 89.23%
93.59% and 93.33% after compensation. The experimental results demonstrate that the presented comprehensive model and compensation method have high precision and good robustness.
关键词
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references
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