Process and apparatus for measurement of nonuniformity of mass i

Details Process and apparatus for measurement of nonuniformity of mass i Process and apparatus for measurement of nonuniformity of mass i

1979-07-06

1981-07-14

Gill, James J.

Measuring and testing

Rotor unbalance

In situ

73462, G01M 122

Patent

active

042779766

ABSTRACT:
A process and apparatus for measurement of nonuniformity of mass of a gyro rotor having a single bearing. The gyro rotor, which is mounted in a radially fixed and spherically yielding pivot, is rotated to a predetermined speed. The static imbalance of the rotating rotor is then determined by measuring the magnitude and angular position of excursion of the rotating rotor. A force couple acting on the gyro rotor and drift of mass of the gyro rotor are determined by sensing movement of a surface of the rotating rotor at two different times. Preferably, the determination of static imbalance, force couple, and drift are obtained in a single course of measurement. After the preceding have been measured, the components of a mass balancing operation for correcting the measured nonuniformities are determined.

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