Elimination of Gyro Drift by Using Reversal Measurement
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- Kume Tatsuya
- Mechanical Engineering Centre, High Energy Accelerator Research Organization (KEK)
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- Satoh Masanori
- Accelerator Laboratory, High Energy Accelerator Research Organization (KEK)
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- Suwada Tsuyoshi
- Accelerator Laboratory, High Energy Accelerator Research Organization (KEK)
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- Furukawa Kazuro
- Accelerator Laboratory, High Energy Accelerator Research Organization (KEK)
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- Okuyama Eiki
- Faculty of Engineering and Resource, Akita University
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Description
<p>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.</p>
Journal
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- International Journal of Automation Technology
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International Journal of Automation Technology 9 (4), 381-386, 2015-07-05
Fuji Technology Press Ltd.