The Statement of Design and Application Questions for the Gyroscope with a Gas-dynamic Suspension of Ball Rotor in the Navigation Support Drilling System

Golikov, A. V.; Ignatovskaya, Anastasiya Albertovna

doi:10.1088/1742-6596/671/1/012020

Cited by 1 publication

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“…They have been designed with gas-dynamic bearings to support the rotor. As gases are less viscous than liquid, and the environmental temperature has only a little impact on it, the rotational speed of gas-dynamic bearing gyroscopes could reach 10,000~100,000 rotations per minute (rpm) [4]. Moreover, the high speed could greatly reduce the gyro error torque without increasing weight [5,6].…”

Section: Introductionmentioning

confidence: 99%

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

Stankovic

Duan

2020

Sensors

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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.

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Section: Introductionmentioning

confidence: 99%