L Qian, DING Xukai, CHEN He, et al. Measurement method of azimuth angle of modal principal axis based on micro hemisphere resonance gyroscope[J]. 2021, (9): 117-120.
L Qian, DING Xukai, CHEN He, et al. Measurement method of azimuth angle of modal principal axis based on micro hemisphere resonance gyroscope[J]. 2021, (9): 117-120. DOI: 10.13873/J.1000-9787(2021)09-0117-04.
Due to severe processing errors in blowing process of micro hemisphere resonator
structure error of resonator will be caused
which will cause frequency splitting and deflection of modal principal axial which affect property of gyroscope.The azimuth angle of the modal principal axis reflects the angle of the structural error of the resonator
which can guide the structural error research and mechanical adjustment of the microresonator.Based on the general equation of motion of an ideal harmonic oscillator
the error model of the micro hemisphere resonator is derived.A method can be used to calculate the azimuth of the principal axis based on data obtained by electric frequency sweeping.Two micro hemisphere resonators with Q of 1 930 and 13 390 are selected for experiments.The modal principal axial azimuth angles of the two are 30.36 ° and 34.75 °
respectively.Finally
it is confirmed through simulation that the azimuth angle of the modal principal axial measured by this method is valid.