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研究了微机械振动轮式陀螺仪的工作原理和实现方法,提出了保证测量精度,提高动态测量带宽的闭环控制系统。从动力学模型出发,推导此类陀螺的检测输入角速度灵敏度,开环、闭环传递函数,交流反馈控制提取同相分量和抑制正交分量的原理,以及闭环控制改善动态测量频带的方法。分析指出,对于中等精度的微机械陀螺,采用静电力再平衡回路控制是必要且可行的。
The working principle and realization method of the micromechanical vibration wheel gyro are studied. A closed-loop control system is proposed to ensure the measurement accuracy and improve the dynamic measurement bandwidth. Based on the dynamic model, the sensitivity of the gyroscope’s detection input angular velocity, the open-loop and closed-loop transfer functions, the principle of the AC feedback control to extract the in-phase component and suppress the quadrature component, and the method of closed-loop control to improve the dynamic measurement frequency band are derived. It is pointed out that it is necessary and feasible to use the electromechanical rebalance circuit control for the medium precision micromechanical gyroscope.