Comparative research on the methods for measuring the mode deflection angle of cylindrical resonator gyroscope

Kai Wang; Zhenfang Fan; Dongya Wang; Yanyan Wang; Yao Pan; Tianliang Qu; Guangming Xu

doi:10.1117/12.2246823

19 October 2016 Comparative research on the methods for measuring the mode deflection angle of cylindrical resonator gyroscope

Kai Wang, Zhenfang Fan, Dongya Wang, Yanyan Wang, Yao Pan, Tianliang Qu, Guangming Xu

Author Affiliations +

Proceedings Volume 10153, Advanced Laser Manufacturing Technology; 101530V (2016) https://doi.org/10.1117/12.2246823
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China

Abstract

The existence of mode deflection angle in the cylindrical resonator gyroscope (CRG) leads to the signal drift on the detecting nodes of the gyro vibration and significantly decreases the performance of the CRG. Measuring the mode deflection angle efficiently is the foundation of tuning for the imperfect cylindrical shell resonator. In this paper, an optical method based on the measuring gyroscopic resonator’s vibration amplitude with the laser Doppler vibrometer and an electrical method based on measuring the output voltage of the electrodes on the resonator are both presented to measure the mode deflection angle. Comparative experiments were implemented to verify the methodology and the results show that both of the two methods could recognize the mode deflection angle efficiently. The precision of the optical method relies on the number and position of testing points distributed on the resonator. The electrical method with simple circuit shows high accuracy of measuring in a less time compared to the optical method and its error source arises from the influence of circuit noise as well as the inconsistent distribution of the piezoelectric electrodes.

Citation Download Citation

Kai Wang, Zhenfang Fan, Dongya Wang, Yanyan Wang, Yao Pan, Tianliang Qu, and Guangming Xu "Comparative research on the methods for measuring the mode deflection angle of cylindrical resonator gyroscope", Proc. SPIE 10153, Advanced Laser Manufacturing Technology, 101530V (19 October 2016); https://doi.org/10.1117/12.2246823

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