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IJAT Vol.14 No.1 pp. 52-58
doi: 10.20965/ijat.2020.p0052
(2020)

Paper:

Angle Detection Using Gyro Signals Rotating Around Four Orthogonally Aligned Axes

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

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

Corresponding author

**Accelerator Laboratory, High Energy Accelerator Research Organization (KEK), Tsukuba, Japan

***Faculty of Engineering and Resource, Akita University, Akita, Japan

Received:
June 21, 2019
Accepted:
October 24, 2019
Published:
January 5, 2020
Keywords:
gyro, rate offset, scale factor, reversal measurement, earth’s rotation
Abstract

An angle sensor can be used to evaluate profiles without any shape references. We regard it suitable for evaluating a large profile and consider a gyro as an angle sensor for evaluating a profile larger than 100 m with an accuracy of better than 1 mm. A gyro can evaluate profiles without restrictions in span or direction; however, angles detected by a gyro typically fluctuate unacceptably for our purpose. We demonstrate that periodical reversal measurement by flipping a gyro is effective in reducing the effect of the fluctuation. Then, we rotate the gyro for continuously realizing the reversal, where the angles of the gyro’s rotating axis against the earth’s rotating axis can be derived without being affected by the fluctuation, and can be used as an angle sensor. Here, we consider a new method using gyro signals rotating around four orthogonally aligned axes. This can improve the accuracy of the derived angles by eliminating the effects of the gyro’s scale factor as well as the fluctuations.

Cite this article as:
T. Kume, M. Satoh, T. Suwada, K. Furukawa, and E. Okuyama, “Angle Detection Using Gyro Signals Rotating Around Four Orthogonally Aligned Axes,” Int. J. Automation Technol., Vol.14, No.1, pp. 52-58, 2020.
Data files:
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Last updated on Feb. 17, 2020