Xing Changda, Wang Xinning, Wang Zishuo, Wang Yuchen, Li Chong
School of Engineering, Ocean University of China, Qingdao 266102, China.
Teaching Center of Fundamental Courses, Ocean University of China, Qingdao 266102, China.
Micromachines (Basel). 2022 Aug 3;13(8):1251. doi: 10.3390/mi13081251.
During in-run mode matching under a dual-mode gyro scheme, the stability of the closed-loop control system has a boundary. This phenomenon will lead to the failure of the in-run frequency split calibration scheme when the initial mode mismatch is too severe to exceed the stability boundary. This paper gives a detailed analysis of this stability boundary through simulations and experiments. Results show that the length of the stable region will be affected by the resonant frequency and the value. High resonant frequency and low value will widen the stable region, but also reduce the sensitivity and rapidity of the calibration. In order to remove the limitation of the stability boundary while applying the in-run frequency split calibration under dual-mode architecture, this paper proposes an enhanced solution that combines both the dual-mode scheme and technology of mode switching. The application of mode switching achieves a pre-calibration of frequency split before the normal gyro operation. This solution is implemented in engineering on a hybrid gyro interface circuit prototype with single-mode and dual-mode. Validation experiments confirmed the effectiveness of this solution.
在双模陀螺方案下的运行中模式匹配期间，闭环控制系统的稳定性存在一个边界。当初始模式失配过于严重以至于超过稳定边界时，这种现象会导致运行中频率分裂校准方案失败。本文通过仿真和实验对该稳定边界进行了详细分析。结果表明，稳定区域的长度会受到谐振频率和 值的影响。高谐振频率和低值会拓宽稳定区域，但也会降低校准的灵敏度和快速性。为了在双模架构下应用运行中频率分裂校准时消除稳定边界的限制，本文提出了一种增强解决方案，该方案结合了双模方案和模式切换技术。模式切换的应用在陀螺正常运行之前实现了频率分裂的预校准。该解决方案在具有单模和双模的混合陀螺接口电路原型上进行了工程实现。验证实验证实了该解决方案的有效性。
