한국생산제조학회지 (Journal of the Korean Society of Manufacturing Technology Engineers)

  • 제22권1호
  • /
  • Pages.107-111
  • /
  • 2013
  • /
  • 2508-5093(pISSN)
  • /
  • 2508-5107(eISSN)
한국생산제조학회 (The Korean Society of Manufacturing Technology Engineers)
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링 레이저 자이로스콥을 위한 유한요소법 기계 설계

Mechanical Design of Ring Laser Gyroscope Using Finite Element Method

  • 이정익 (인하공업전문대학 기계공학부 기계설계과)
  • 투고 : 2012.08.07
  • 심사 : 2012.09.22
  • 발행 : 2013.02.15
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초록

The gyroscopes have been used as a suitable inertial instrument for the navigation guidance and attitude controls. The accuracy as very sensitive sensor is limited by the lock-in region (dead band) due to the frequency coupling between two counter-propagating waves at low rotation rates. This frequency coupling gives no phase difference, and an angular increment is not detected. This problem can be overcome by mechanically dithering the gyroscope. This paper presents the design method of mechanical dither by the theoretical considerations and the verification of the theoretical equations through FEM applications. As a result, comparing to the past result, the maximum prediction error of resonant frequency was within 3 percent and peak dither rate was within 5 percent. It was found that the theoretical equations can be feasible for the mechanical performance of dither.

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참고문헌

  1. Kline-Schoder, R. J., Wright, M. J., 1992, "Design of a Dither Mirror Control System," Mechanics, Vol. 2, No. 2, pp. 115-127.
  2. Craig, R. R., 1981, Structural Dynamics an Introduction to Computer Methods, John Wiley & Sons, New York.
  3. Schleich, W., and Dobiasch, P., 1984, "Noise Analysis of Ring Laser Gyroscope with Arbitrary Dither," Optics Communications, Vol. 52, No. 1, pp. 63-68. https://doi.org/10.1016/0030-4018(84)90074-9
  4. Shackleton, B. R., 1987, "Mechanical Design Considerations for a Ring Laser Gyro Dither Mechanism," Proceeding Instrument Mechanical Engineering, pp. 105-112.
  5. Hutchings, T. J., 1978, "Scale Factor Non-linearity of a Body Dither Laser Gyro," Proc. IEEE Nat'l Aerospace and Electronic conference, pp. 549-555.
  6. Cho, H. Y., Kim, K. W., Kim, D. B., Sin, H. S., Kim, W. Y., and Park, J. K., 2012, "Finite Element Analysis for Laser Polishing," 2012 Proceedings of the Korean Society of Manufacturing, pp. 29.
  7. Lee, Y. C., 2008, "A Study on the Mechanical Design and the 2.5-axile Combined Machining by CAD/CAM," Transaction of the Korean Society of Manufacturing Technology Engineers, Vol. 17, No. 6, pp. 97-103.