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IJAT Vol.9 No.4 pp. 381-386
doi: 10.20965/ijat.2015.p0381
(2015)

Paper:

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Elimination of Gyro Drift by Using Reversal Measurement

Tatsuya Kume*, Masanori Satoh**, Tsuyoshi Suwada**, Kazuro Furukawa**, and Eiki Okuyama***

*Mechanical Engineering Centre, High Energy Accelerator Research Organization (KEK)
1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

**Accelerator Laboratory, High Energy Accelerator Research Organization (KEK)
1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

***Faculty of Engineering and Resource, Akita University
1-1 Tegata gakuen-machi, Akita 010-8502, Japan

Received:
January 15, 2015
Accepted:
June 17, 2015
Published:
July 5, 2015
Creative Commons License
Keywords:
gyro, drift, rate offset, reversal measurement, straightness
Abstract
We aim to realize a large-scale straightness evaluation using a gyro. It detects tangential angles to evaluate a profile without any references. However, fluctuations of angular signal, called gyro drift, are considered a major contributor of error. We adopted a reversal measurement for eliminating the drift. The reversal measurement has been widely used for eliminating stable error from ancient. Here, we periodically performed reversal measurements for eliminating drift of a commercially available fiber optic gyro (FOG) unit. As a result, an angle could be derived with a standard deviation of 0.4 mrad for 1 hour of repeated measurements with an interval of 60 s, even though the gyro has a drift of several mrad/h including the effects of the Earth’s rotation. This indicates that the reversal measurement is effective in reducing the drift.
Cite this article as:
T. Kume, M. Satoh, T. Suwada, K. Furukawa, and E. Okuyama, “Elimination of Gyro Drift by Using Reversal Measurement,” Int. J. Automation Technol., Vol.9 No.4, pp. 381-386, 2015.
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