Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1975-08-28
1976-08-17
Gill, James J.
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
73511, 74 5F, G01P 902, G01P 1502
Patent
active
039747018
ABSTRACT:
Spin coupled angular rate sensitive inertial sensors of the tuned suspension system type, and method of fabricating such sensors whereby the twice spin frequency linear and angular vibration sensitivity characteristic of tuned sensors may be eliminated. The twice spin frequency angular vibration sensitivity characteristic of other tuned inertial sensors is eliminated by creating an equal and opposite torque component dependent on the same vibrational input. This is done by angularly offsetting the rotor suspension system from a plane orthogonal to the spin axis, and by providing the shaft assembly with an effective product of inertia of controlled magnitude and orientation. The product of inertia modulates any twice spin frequency angular vibration of the shaft about an axis orthogonal to the spin axis with the spin frequency of the shaft to provide an angular disturbance of the shaft about the spin axis. This spin frequency angular disturbance in combination with the inclination of the rotor suspension system causes the compensating twice spin frequency torque component on the rotor, which may be controlled as appropriate by adjusting the magnitude and position of the product of inertia on the shaft.
Similar compensating effects for twice spin frequency linear vibration may be achieved by an appropriate effective radial unbalance of the shaft assembly. Various forms of implementation of the invention and methods of dynamically balancing the rotating assemblies are disclosed. Control of the zero frequency or twice spin frequency torques on the rotor may be controlled by the methods disclosed.
REFERENCES:
patent: 3301073 (1967-01-01), Howe
patent: 3306115 (1967-02-01), Granqvist
patent: 3576133 (1971-04-01), Krupick
Gill James J.
Teledyne Industries Inc.
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