The navigation accuracy of laser strap-down inertial navigation products declines with gyro dither, which is a bottleneck problem for the development of the important aviation instrument. The reason is that the dither of three gyros in the product couples and generates extra noise in the output signals of gyros. To decouple dither, this paper applies the vibration absorber in laser inertial navigation products. First of all, an angular vibration model of the three-rigid body system, which is constructed by the gyro, platform, and vibration absorber, is established. Then, the theoretical restriction of the absorber and the system response are derived. Finally, considering the power limitation for dither, the total power of the vibration system is analyzed. The analytical and experimental results show that the efficiency of the vibration absorber only relates to the frequency offset with gyros, and the absorber does lead to a sharp power increase.

中文翻译：

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减振器在激光惯性导航产品中的应用

陀螺抖动会降低激光捷联惯性导航产品的导航精度，这是重要航空仪表发展的瓶颈问题。原因是产品中的三个陀螺仪的抖动会耦合并在陀螺仪的输出信号中产生额外的噪声。为了消除抖动，本文将减振器应用于激光惯性导航产品中。首先，建立了由陀螺仪，平台和减振器构成的三刚体系统的角振动模型。然后，得出了吸收器的理论限制和系统响应。最后，考虑抖动的功率限制，分析了振动系统的总功率。