Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Performance test method of hemispherical resonators based on interdigital electrode excitation and attenuation signal fitting
| DOI: | 10.11809/bqzbgcxb2023.06.037 |
| Keywords: | hemispherical resonator; frequency cracking value; time constant; stiffness axis angle position; interdigital electrodes |
| Abstract: | A hemispherical resonator is the core sensitive element of a hemispherical resonant gyroscope, and its performance parameters such as frequency cracking values and time constant directly determine the gyro accuracy, so it is necessary to accurately test its performance parameters in the gyro development process. Aiming at the test of performance parameters, this paper firstly designs and optimizes a hemispherical resonator non contact excitation method based on the interdigital electrodes. Then, it studies the performance parameter identification method based on attenuation signal fitting and carries out the modeling and simulation. The influence of various errors on the test accuracy is also analyzed. Finally, an experimental device is set up for testing, and it is found that the test repeatability of the frequency cracking value, time constant and stiffness axis angle position is 0.92 mHz, 0.537 s and 0.327° respectively. The results show that the method has good test repeatability, and can accurately measure the performance parameters of the quartz hemispherical resonator, laying a test foundation for the development of hemispherical resonant gyroscopes. |
| Issue: | Vol. 44 No. 6 (2023) |
| Published: | 2023-06-28 |
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