Null circuit for use in an angular rate instrument

Details Null circuit for use in an angular rate instrument Null circuit for use in an angular rate instrument

1980-12-15

1982-12-28

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

Means integrating time and acceleration

73517A, G01P 700

Patent

active

043655122

ABSTRACT:
An angular rate instrument adapted for mounting to a given object for measuring the rate of turn of the latter is disclosed herein. This instrument utilizes an angular accelerometer to sense angular acceleration to which the instrument is subjected and a circuit for integrating the difference between this signal and a reference signal to produce an integrated output signal corresponding to the rate of turn of the object. The angular rate instrument also utilizes a null circuit for producing the reference signal in response to and dependent on low frequency error signals which appear at the output of the signal integrating circuit. The null circuit uses a capacitor to provide the reference signal and means for maintaining the charge on the capacitor during power interruptions so as to prevent losing the reference signal as a result of such interruptions.

REFERENCES:
patent: 3948107 (1976-04-01), Asmar et al.
patent: 4085363 (1978-04-01), Gravina et al.

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