Research on the method to improve the vibration stability of vibratory cylinder gyroscopes under temperature variation

Due to the material defects, manufacture errors and internal stress, the vibration axis stability of the vibratory cylinder gyroscope is highly influenced by environment temperature. According to the influencing rule of the internal stress on the vibrating axis, a special resonator structure is proposed which can generate oriented thermal stress to reduce the temperature drift of vibrating axis of the resonator. Firstly, the drift trend of the vibrating axis under varying temperature is analyzed. Secondly, thermal stress structures with holes and grooves are fabricated in special direction at the bottom of the resonator. Those thermal stress structures can generate thermal stress to make the vibrating axis rotate in the opposite direction, which can reduces the gyroscope's temperature drift. Finally, simulations and experiments are conducted and results show that the proposed method can give good compensation effect for temperature drift of the vibratory cylinder gyroscope.