Zhao Wanliang, Yang Hao, Liu Fucheng, Su Yan, Li Chong
Nanjing University of Science and Technology, Nanjing, 210094, China.
Shanghai Aerospace Control Technology Institute, Shanghai, 201200, China.
Sci Rep. 2021 Jan 26;11(1):2195. doi: 10.1038/s41598-020-80885-y.
The rate-integrating gyroscope (RIG) operation is considered as the next generation architecture for hemispherical resonator gyroscopes (HRGs) with advantages of direct angle measurement and unlimited dynamic range. However, this RIG operation requires high symmetry for the HRG device and the damping mismatch of the two gyroscopic modes will result in a dead area problem. This work analyzes the error mechanism of the damping asymmetry induced dead area and proposed a novel virtual procession compensation method for HRG RIG. The simulation proves the existence of the dead area as the theory predicted. More importantly, the experimental HRG RIG platform with the proposed compensation method can significantly expand the dynamic range with accurate angle measurement and overcome the problem of dead area. The earth rotation is accurate measured which is the first time that captured by a RIG scheme as a state-of-the-art result.
速率积分陀螺仪（RIG）操作被认为是半球谐振陀螺仪（HRG）的下一代架构，具有直接角度测量和无限动态范围的优点。然而，这种RIG操作要求HRG器件具有高度对称性，并且两个陀螺模式的阻尼失配会导致死区问题。这项工作分析了由阻尼不对称引起的死区的误差机制，并提出了一种用于HRG RIG的新型虚拟处理补偿方法。仿真证明了死区的存在，正如理论预测的那样。更重要的是，采用所提出补偿方法的实验性HRG RIG平台能够通过精确的角度测量显著扩展动态范围，并克服死区问题。首次通过RIG方案精确测量了地球自转，这是一项前沿成果。
