Direct dither control without external feedback for ring laser gyro
Direct dither control without external feedback for ring laser gyro
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DOI：
10.1016/j.optlastec.2011.11.032
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发表时间：
2012-06-01
影响因子：
5
通讯作者：
Hu, Shaomin
中科院分区：
文献类型：
--
作者：
Fan, Zhenfang;Luo, Hui;Hu, Shaomin
为了避免锁定效应，在激光陀螺中引入了体抖动。抖动反馈信号是控制抖动驱动信号所必需的。在目前的抖动控制方法中，抖动反馈通常采用压电换能器或电磁换能器，激光陀螺仪的读出信号包含了所有与抖动有关的信息，因此可以从读出的信号中获得抖动反馈，从而可以减少外部反馈。介绍了一种新的无外反馈抖动控制方法。详细描述了如何控制抖动幅度和跟踪抖动电机的谐振频率。对新旧抖动控制方法进行了对比实验。结果表明，新方法得到的激光陀螺输出精度与原方法相当，但电路尺寸更紧凑。皇冠版权所有(C)2011由爱思唯尔有限公司出版。保留所有权利。
To avoid the lock-in effect, a body dither is introduced for the ring laser gyro (RLG). A dither feedback signal is necessary to control the dither drive signal. In the current dither control method, a piezoelectric or electromagnetic transducer is often used to obtain the dither feedback The read-out signal of the RLG contains all dither-related information; hence, dither feedback can be obtained from the read-out signal, and external feedback can be reduced. A novel dither controlling method without external feedback is introduced in the present paper. How to control the dither amplitude and track the resonant frequency of the dither motor is described in detail. A comparative experiment is conducted between the old dither control method and the new one. Results show that the output of RLG using the new method has the same accuracy as that using the old method, aside from having more compact circuit dimensions. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.