Vibratory rotation sensor

Details Vibratory rotation sensor Vibratory rotation sensor

1989-06-12

1990-08-28

Noland, Tom

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

73 1D, 73 1DV, 73504, G01C 1942, G01C 1956

Patent

active

049515080

ABSTRACT:
A vibratory rotation sensor includes a heimspherical resonator, a ring forcer electrode and a plurality of discrete forcer and pick-off electrodes. A vibratory or flexural standing wave pattern is established in the resonator and signals from the pick-off electrodes are combined to produce first (E.sub.c) and second (E.sub.s) signals that represent two independent components of the vibration pattern. A reference phase generator generates timing signal that are used to demodulate E.sub.c and E.sub.s to obtain in-phase and quadrature components thereof. The quadrature components are transformed in a computer to generate nodal and antinodal quadrature signals. The nodal quadrature signal is used as the error signal in a quadrature control loop that keeps both components of the vibration pattern in phase. The antinodal quadrature signal is used as the error signal in a phase-locked loop that keeps the phase of the reference phase generator locked to the phase of the vibration.

REFERENCES:
patent: 3625067 (1971-12-01), Emslie
patent: 3656354 (1972-04-01), Lynch
patent: 3678762 (1972-07-01), Denis
patent: 3719074 (1973-03-01), Lynch
patent: 4149260 (1979-04-01), Loper, Jr.
patent: 4157041 (1979-06-01), Loper, Jr. et al.
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patent: 4520669 (1985-06-01), Rider
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patent: 4601206 (1986-07-01), Watson
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"The HRG: A New Low-Noise Inertial Rotation Sensor" presented at Proceedings, 16th Joint Srvices Data Exchange for Inertial Systems in Los Angeles, Ca1:6., on 16-18 Nov. 1982, paper pp. 1-6 by Edward J. Loper et al. and 4 cover or contents pages.
"Part X: Hemisherical Resonator Gyro"; IEE Transactions on Aerospace and Electronic Systems; vol. AES-20, No. 4; Jul. 1984, pp. 432-433; by David D. Lynch.

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