Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A Study on the Relation Between the Scale Factor Non-linearity and Dither Noise form of Ring Laser Gyroscope

링레이저 자이로의 환산계수 비선형성과 공진기 각진동 잡음 형태의 관련성 연구

  • Published : 2007.03.30
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Abstract

In this paper we confirm the disappearance of dynamic lock-in simply by increasing the dither noise magnitude of the ring laser gyroscope by numerical and experimental method. After that, we numerically study the relation between the dither noise forms and scale factor non-linearities by comparing those of the two case outputs which are individually generated by operating with the two types of dither noise forms. The first one is the simple form composed of consecutive alternations of the random increasing and decreasing parts but maximum and minimum dither envelopes are scarcely changeable. And the second one is similar to the first one but maximum and minimum dither envelopes are randomly changable. As a result, we find that the scale factor non-linearity could be improved by the second one. And we confirm those results by experimental measurements.

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References

  1. Post E. J., "Sagnac Effect", Review of Modern Physics, Vol. 39, Number 2, pp.475-493, April 1967 https://doi.org/10.1103/RevModPhys.39.475
  2. Sargent M., "Basic Ring Laser Gyro Theory", SPIE, Vol. 487 Physics of Ring Laser Gyros, pp.22-29, 1984
  3. Aronowitz F., Collins R. J., "Lock-in and Intensity-Phase Interaction in the Ring Laser", Journal of Applied Physics, January, pp.130-141, 1970
  4. Weng W., "Theory of Multioscillator Laser Gyro", SPIE, Vol. 487 Physics of Ring Laser Gyros, pp.30-32, 1984
  5. Hutchings T. J., Stjern D. C., "Scale Factor Non-linearity of a Body Dither Laser Gyro", Proc. IEEE Nat'l Aerospace and Electronic Conf., pp.549-555, 1978
  6. Wang Kedong, Yan Lei, Gu Qatai, "The Influence of noise on output of Ring Laser Gyroscope", Sensor and Actuators, pp.75-83, 2005
  7. Killpatrick J. E., "Laser Gyro Dither Random Noise", SPIE Vol. 487 Physics of Ring Laser Gyros, pp.85-93, 1984
  8. Ljung H. G., "Ring Laser Gyro Dither Eliminator", United State Patent No. 4,344,706, Aug. 17, 1982
  9. Coccoli J. D., Helfrant S. B., "The Intrinsic Stability of Laser Gyro Scale Factor", IEEE, pp.575-582, 1978
  10. Gyro and Accelerometer Panel of the IEEE Aerospace and Electronics Systems Society, "IEEE Standard Specification Format Guide and Test Procedure for Single-Axis Laser Gyros", IEEE Standard Board, Sep. 21, 1995