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Open AccessArticle

Interference Torque of a Gas-Dynamic Bearing Gyroscope Subject to a Uniform Change of the Specific Force and the Carrier Angular Velocity

by 1, 1,* and 2
1
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
2
School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(23), 6852; https://doi.org/10.3390/s20236852
Received: 8 October 2020 / Revised: 16 November 2020 / Accepted: 27 November 2020 / Published: 30 November 2020
(This article belongs to the Collection Inertial Sensors and Applications)
The work is devoted to an analysis of interference torque of a gas-dynamic bearing gyroscope, while a condition with uniformly changed specific force and carrier angular velocity are taken into account. A five-degrees-of-freedom (5-DOF) model is established considering the translation and tilt of the rotor, which solves dynamic rotor equations and the Reynolds equation simultaneously. The model makes it possible to obtain the rotor trajectory under time-transient specific force and carrier angular velocity. The interference torque of the gyroscope is analyzed based on the rotor trajectory. Results indicate that the gas-dynamic bearings show a significant hysteresis effect with a perturbation of bearing force or bearing moment, which indicates the necessity of transient research. Interference torque is large when the carrier angular velocity starts to change or stops to change, and when the specific force stops to change. When the specific force change rate is less than 8.4 km/s3 with no change of the carrier angular velocity, the condition could be simplified as a steady state, which is consistent with the previous study. View Full-Text
Keywords: gas-dynamic bearing gyroscope; interference torque; five-degrees-of-freedom model gas-dynamic bearing gyroscope; interference torque; five-degrees-of-freedom model
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MDPI and ACS Style

Li, Y.; Zhang, D.; Duan, F. Interference Torque of a Gas-Dynamic Bearing Gyroscope Subject to a Uniform Change of the Specific Force and the Carrier Angular Velocity. Sensors 2020, 20, 6852. https://doi.org/10.3390/s20236852

AMA Style

Li Y, Zhang D, Duan F. Interference Torque of a Gas-Dynamic Bearing Gyroscope Subject to a Uniform Change of the Specific Force and the Carrier Angular Velocity. Sensors. 2020; 20(23):6852. https://doi.org/10.3390/s20236852

Chicago/Turabian Style

Li, Yan; Zhang, Desheng; Duan, Fuhai. 2020. "Interference Torque of a Gas-Dynamic Bearing Gyroscope Subject to a Uniform Change of the Specific Force and the Carrier Angular Velocity" Sensors 20, no. 23: 6852. https://doi.org/10.3390/s20236852

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