Honeywell G.m.b.h.

Other

Lloyd W Priddy

Joseph E Killpatrick

Timothy J Callaghan

Steven C Albers

Wesley C Sewell

Timothy Merrill Buck

Stephen Matthew Baker

Craig A Galbrecht

Robert P Pearson

Single beam signal (SBS) components of the laser intensity monitor (LIM) signal are blanked from the path length control circuit (PLC). The AC component of the LIM signal, less the SBS components, is then integrated to produce a transducer mirror drive signal. SBS component blanking is synchronized to the dither pick-off signal. Peak power operation of the PLC is enhanced through the removal of the SBS components from the LIM signal.

Single beam signal blanking for enhanced path length control in a ring laser gyro

A circuit for controlling the run current in a ring laser gyro includes circuitry for sensing temperature, supplying a current to the ring laser gyro and controlling the current supplied to the ring laser gyro and the current varies depending on the temperature. The current changes at predetermined temperature points.

Apparatus for minimizing the effects of laser intensity reduction at

To reduce the accumulative lock-in effects of the ring laser gyroscope, the dither circuitry is provided with low frequency dither amplitude modulation. Such modulation is achieved by first developing a pair of complementary low frequency dither noise signals. These low frequency dither noise signals are then utilized by a modulator to modulate the dither drive signal in conjunction with the low frequency dither noise signals. This results in a system which allows much more dither amplitude modulation with much less output from the drive amplifiers. Because of the ability to increase amplitude modulation, gyro performance is greatly improved.

RLG dither noise injection by means of reference modulation

RLG beam intensity monitor in which the beam intensity information is derived from the a.c. output of the RLG angular rate sensor.

Laser-ring gyro beam intensity monitor

An RLG has a laser beam current control system which controls the current so as to produce a constant beam intensity, allowing the RLG to operate at a current level continuously matched to the operating conditions, thus extending the operating life of the RLG.

Laser beam control for a ring-laser gyro

A drive assembly and control circuit for a mirror assembly. Two piezoelectric discs are mounted on a diaphragm which is centrally connected to the mirror to move it. The drive circuit includes a source and first and second control means responsive to first and second control input signals to change the potential across the piezoelectric discs.

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Mahtomedi, MN, United States of America

Lloyd W Priddy