Tilt Error Analysis of Digital Zenith Instrument Positioning at Large Dip Angle

doi:10.3969/j.issn.1000-1093.2018.02.025

Abstract

Abstract: The self-correction method of inclination compensation value is studied for the axis error between the vertical axis and the rotating shaft at large dip angle, and the accuracy of the inclination compensation value is improved. Based on the principle of inclination compensation of digital zenith instrument, the accuracy of inclination compensation value is proposed to be mainly related to the reading error of inclinometer. A correction model of rotation axis is established based on the theoretical analysis, and the inclination component of rotating shaft is deduced. It is concluded that the linear drift and zero error of inclinometer can be eliminated by correcting the average value of tilt errors of symmetrical observation position. The method of eliminating the tilt error is verified by experiment. The results show that the positioning accuracy of digital zenith instrument is improved from 0.5″ to 0.3″ after the correction of tilt error.Key

Key words: digitalzenithinstrument, celestialpositioning, axiserror, largetiltangle, tilterror, inclinationcompensation

CLC Number:

P128.13

ZHANG Xi-hui， ZHOU Zhao-fa， LIU Xian-yi， ZHU Wen-yong， YANG Shang. Tilt Error Analysis of Digital Zenith Instrument Positioning at Large Dip Angle[J]. Acta Armamentarii, 2018, 39(2): 405-410.

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第39卷
第2期2018 年2月兵工学报ACTA
ARMAMENTARIIVol.39No.2Feb.2018