Abstract:In order to achieve high-performance hemispherical resonator structural design, this paper mainly discusses the effect of structural parameters of hemispherical resonator gyro on its operation mode frequency, mode frequency order and angular gain. Based on the theory of gyro’s angular gain calculation, the angular gain of HRG can be simulated by the finite element method. Then, the modal simulation analysis of HRG with different structural parameters is carried out. It is found that in the design process of HRG, when the ratio of shell thickness to support column radius is less than 1/3, the operation mode of HRG can be set in the easiest position, the first and second order, which improve the sensitivity of the gyroscope. At the same time, the frequency difference between the operation mode and the interference mode can be widened, and the maximum difference is 2760.8Hz in simulation. Finally, the simulation results show that the precession coefficient of hemispherical resonator fluctuates very little due to the structural change, and the fluctuation of angular gain maintains in the range of 0.27 ~ 0.28.