광경로 10 cm 링레이저자이로를 사각형형태로 설계하고 제작한 후 상온 성능시험을 수행하였다. 광학부는 소형이라 디더를 자이로블록 외부에 장착하도록 하였으며, 자이로블록에는 He Ne 레이저를 가두기 위한 두개의 구면경과 두개의 평면경을 배치하고 반투명 평면경위에 장착된 프리즘을 통해 회전에 의한 Sagnac 간섭무늬를 추출할 수 있도록 하였다. 전자부는 광경로 제어기, 방전전류 제어기, 디더제어기를 통해 광학부의 온도변화에 대해 링레이저자이로를 안정화시킨 후 광간섭신호 측정을 통해 회전정보를 계산하고 이를 RS422 통신으로 출력하도록 하였다. 상온에서의 성능시험은 환산계수 오차, 불규칙 잡음, 바이어스 안정도 시험을 수행하였으며, 관성항법장치에 적합한 자이로 성능을 보여주었다.

A Study on the Analysis of the Test Result of Light Path Length 10 cm Ring Laser Gyroscopes

Jai-Seung Yoo*, Tae-Yoon Kwon, Jun-Young Bae, Seong-Ho Min, Jong-Ho Lee, Seok-Won Choi, Dae-Sik Shin, Jong-Nam Im, Haesung Yu, Cheon Joong Kim

A 10 cm optical path ring laser gyro was designed and manufactured in a square shape, and then tests and analysis was performed at room temperature. The optical part is so small that the dither is mounted outside the gyro block, and two spherical and planar mirrors are placed on the gyro block to confine the He Ne laser light inside, and the prism mounted on the partially transparent plane mirror is used to detect the Sagnac interference signal induced by rotation. The electronic unit stabilized the ring laser gyro for temperature variations during operation, in which an optical path controller, a discharge current controller, and a dither controller were implemented. Then the controller in the electronic unit calculates rotation information and outputs it through RS422 communication. In the performance test at room temperature, such as scale factor error, angular random walk noise and bias stability were measured, and the results which is suitable for the inertial navigation system was shown.

Keywords: ring laser gyro, gyroscope, inertial navigation system

Speaker 유재승* 한화에어로스페이스