Deviation caused by circular arc in axis orbit measurement and its modification

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (24) : 243-248.

MA Huifang, WAN Zhao

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Abstract

Analysis on deviation caused by circular arc in axis orbit measurement was conducted, and the effects of the radius in the measurement plane and the displacements in the radial direction on the deviation were discussed.The results show that the smaller the radius in the measurement plane is, the more the deviation is; and the more the displacement in the radius direction is, the more the deviation is.Based on the analysis on the deviation, a modification method was presented, which was able to compute the real displacements of the axis orbit based on the measured displacements, with the radius in the measurement plane as an input.By using the proposed modification method, the deviation caused by circular arc can be eliminated, and improvement on measurement accuracy is made.The modification method has a significant engineering application value, which is suitable for both real-time testing systems and offline systems.

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axis orbit / measure / deviation / modification

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MA Huifang, WAN Zhao . Deviation caused by circular arc in axis orbit measurement and its modification[J]. Journal of Vibration and Shock, 2019, 38(24): 243-248

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