Choi Bumkyoo, Lee Seung-Yop, Kim Taekhyun, Baek Seog Soon
Department of Mechanical Engineering Sogang University / #1 Shinsu-dong, Mapo-gu, Seoul 121-742, Korea.
Sensors (Basel). 2008 Jun 3;8(6):3706-3718. doi: 10.3390/s8063706.
In a vertical type, vibratory gyroscope, the coupled motion between reference (driving) and sensing vibrations causes the zero-point output, which is the unwanted sensing vibration without angular velocity. This structural coupling leads to an inherent discrepancy between the natural frequencies of the reference and the sensing oscillations, causing curve veering in frequency loci. The coupled motion deteriorates sensing performance and dynamic stability. In this paper, the dynamic characteristics associated with the coupling phenomenon are theoretically analyzed. The effects of reference frequency and coupling factor on the rotational direction and amplitude of elliptic oscillation are determined. Based on the analytical studies on the coupling effects, we propose and fabricate a vertically decoupled vibratory gyroscope with the frequency matching.
在垂直型振动陀螺仪中,参考(驱动)振动和传感振动之间的耦合运动会导致零点输出,即没有角速度时不需要的传感振动。这种结构耦合导致参考振荡和传感振荡的固有频率之间存在差异,从而在频率轨迹上产生曲线转向。耦合运动会降低传感性能和动态稳定性。本文对与耦合现象相关的动态特性进行了理论分析。确定了参考频率和耦合因子对椭圆振荡旋转方向和幅度的影响。基于对耦合效应的分析研究,我们提出并制造了一种具有频率匹配的垂直解耦振动陀螺仪。