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| Research on the Dynamic Characteristics of Laser Gyroscope（Ⅱ） |
| CHENG Yao-Qiang-1a, XU De-Min-1a, 1b , WAN Yan-Hui-2, LIU Ming-Yong-1a |
| （1a. School of Marine Engineering; 1b. National Key Laboratory for Underwater Information Process & Control，Northwestern Polytechnical University, Xi’an 710072, China；2. The 16th Institute, Chinese Aerospace Science and Technology Corporation，Xi’an 710100, China） |
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Abstract According to the laser gyro’s phase frequency characteristics this paper analyzed the influence of phase delay on realtime and mobility of missile control system, then studied the factors that cause phase delay of laser gyro, and pointed out that the vibration isolator does not bring phase delay, and FIR filter is the main factor for phase delay of laser gyro.Based on the angle vibration table and inertial measurement unit(IMU) body, four test states were designed and a practical test with phase frequency characteristics of laser gyro was conducted using sine excitation method. The test results show that the vibration isolator’s delay time is no more than 0.051 ms and the delay time mainly comes from FIR filter, which is in accord with the theoretical analysis results.
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Received: 20 September 2011
Published: 31 August 2012
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