The equations are derived for the torques on a spherical rotor. Using suitable transformation matrices, these error torques are related to the bearing compliances and the so-called g2 coefficients. The method of determining these coefficients is indicated, using the experimental technique of tumble testing the gyroscope.
The Effect of Viscous and Pressure Gradient Torques on a Free-Rotor Gyroscope
S. L. Zedekar
Autonetics Division of North American Rockwell Corp., Anaheim, Calif.
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Zedekar, S. L. (October 1, 1968). "The Effect of Viscous and Pressure Gradient Torques on a Free-Rotor Gyroscope." ASME. J. of Lubrication Tech. October 1968; 90(4): 769–772. https://doi.org/10.1115/1.3601715
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