激光惯组结构系统陀螺抖动性能确定方法与应用

当二频机抖陀螺相对于其安装基座的抖动幅度较小时，偏频技术不能很好消除锁区的影响，陀螺精度将降低，甚至停止抖动失去功能。激光陀螺抖动性能与结构密切相关，给出了激光惯组箱体减振器本体抖轮陀螺体系统的激光陀螺抖动多体动力学模型及关键参数识别方法，能够根据激光惯组的结构、减振设计方案计算陀螺抖动性能，进而选取合适参数及结构布局解决激光惯组系统陀螺抖动效率差的问题。最后，通过型号实际问题分析验证了该方法的准确性及工程实用性。

The Method and Application of Determining the Jitter Performance of Laser IMU

When the dither amplitude of the mechanically dithered gyro is relatively small, it will not be able to eliminate the influence of the lock area, which will lead to the low precision of the laser gyro, and even the laser gyro can stop the jitter and lose its function. The jitter performance of laser gyro is closely related to the structure of laser IMU. In this paper, the multi body dynamics model of laser gyro and the key parameter identification method are presented, which are composed of the shell, the shock absorber, the combination of the instrument, the wobble wheel and the gyro body of the laser IMU. The jitter performance of laser gyro according to the structure and design of vibration reduction scheme of laser IMU is calculated by the method, in order to obtain the model parameters and structure layout suitable according to the calculation results, solve the problem of dither efficiency difference system of laser IMU. Finally, the accuracy and practicability of the method are verified by the actual project.