CA2009788A1 - Computer Generated Dither Drive - Google Patents

Computer Generated Dither Drive

Info

Publication number
CA2009788A1
CA2009788A1 CA2009788A CA2009788A CA2009788A1 CA 2009788 A1 CA2009788 A1 CA 2009788A1 CA 2009788 A CA2009788 A CA 2009788A CA 2009788 A CA2009788 A CA 2009788A CA 2009788 A1 CA2009788 A1 CA 2009788A1
Authority
CA
Canada
Prior art keywords
flexure
dither drive
dither
frame
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2009788A
Other languages
French (fr)
Other versions
CA2009788C (en
Inventor
Daniel A. Tazartes
John G. Mark
Robert E. Ebner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northrop Grumman Guidance and Electronics Co Inc
Original Assignee
Litton Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Litton Systems Inc filed Critical Litton Systems Inc
Publication of CA2009788A1 publication Critical patent/CA2009788A1/en
Application granted granted Critical
Publication of CA2009788C publication Critical patent/CA2009788C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58—Turn-sensitive devices without moving masses
    • G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
    • G01C19/66—Ring laser gyrometers
    • G01C19/68—Lock-in prevention
    • G01C19/70—Lock-in prevention by mechanical means

Abstract

A dither drive system for a ring laser gyroscope includes a computer, a digital to analog converter, a filter and a power amplifier. The system also includes a frame mounted to a flexure having a resonant frequency, the flexure being mounted between a base and the frame such that the frame may be dithered relative to the base.
The dither frequency is sensed and a digital signal that corresponds to a specified dither drive signal is produced.
The digital signal is converted to a corresponding analog signal and the dither drive signal is toggled to drive the flexure at its resonant frequency. This system avoids the necessity of using much of the expensive hardware included in previous systems.
CA002009788A 1989-06-19 1990-02-12 Computer generated dither drive Expired - Fee Related CA2009788C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/367,957 US4981359A (en) 1989-06-19 1989-06-19 Ring laser gyroscope dither drive system and method
US367,957 1989-06-19

Publications (2)

Publication Number Publication Date
CA2009788A1 true CA2009788A1 (en) 1990-12-19
CA2009788C CA2009788C (en) 1999-11-23

Family

ID=23449305

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002009788A Expired - Fee Related CA2009788C (en) 1989-06-19 1990-02-12 Computer generated dither drive

Country Status (5)

Country Link
US (1) US4981359A (en)
JP (1) JP2644067B2 (en)
CA (1) CA2009788C (en)
FR (1) FR2648556B1 (en)
GB (1) GB2233145B (en)

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US5473945A (en) * 1990-02-14 1995-12-12 The Charles Stark Draper Laboratory, Inc. Micromechanical angular accelerometer with auxiliary linear accelerometer
US5357817A (en) * 1990-04-19 1994-10-25 Charles Stark Draper Laboratory, Inc. Wide bandwidth stable member without angular accelerometers
US5325173A (en) * 1990-05-04 1994-06-28 Litton Systems, Inc. Apparatus for compensating for change in laser gyro dither pickoff scale factor
US5605598A (en) * 1990-10-17 1997-02-25 The Charles Stark Draper Laboratory Inc. Monolithic micromechanical vibrating beam accelerometer with trimmable resonant frequency
US5408119A (en) * 1990-10-17 1995-04-18 The Charles Stark Draper Laboratory, Inc. Monolithic micromechanical vibrating string accelerometer with trimmable resonant frequency
US5635639A (en) * 1991-09-11 1997-06-03 The Charles Stark Draper Laboratory, Inc. Micromechanical tuning fork angular rate sensor
US5331852A (en) * 1991-09-11 1994-07-26 The Charles Stark Draper Laboratory, Inc. Electromagnetic rebalanced micromechanical transducer
US5408877A (en) * 1992-03-16 1995-04-25 The Charles Stark Draper Laboratory, Inc. Micromechanical gyroscopic transducer with improved drive and sense capabilities
US5767405A (en) * 1992-04-07 1998-06-16 The Charles Stark Draper Laboratory, Inc. Comb-drive micromechanical tuning fork gyroscope with piezoelectric readout
US5349855A (en) * 1992-04-07 1994-09-27 The Charles Stark Draper Laboratory, Inc. Comb drive micromechanical tuning fork gyro
US5388458A (en) * 1992-11-24 1995-02-14 The Charles Stark Draper Laboratory, Inc. Quartz resonant gyroscope or quartz resonant tuning fork gyroscope
US5555765A (en) * 1993-02-10 1996-09-17 The Charles Stark Draper Laboratory, Inc. Gimballed vibrating wheel gyroscope
US5650568A (en) * 1993-02-10 1997-07-22 The Charles Stark Draper Laboratory, Inc. Gimballed vibrating wheel gyroscope having strain relief features
US5416584A (en) * 1994-04-25 1995-05-16 Honeywell Inc. Sinusoidal noise injection into the dither of a ring laser gyroscope
US5581035A (en) * 1994-08-29 1996-12-03 The Charles Stark Draper Laboratory, Inc. Micromechanical sensor with a guard band electrode
US5646348A (en) 1994-08-29 1997-07-08 The Charles Stark Draper Laboratory, Inc. Micromechanical sensor with a guard band electrode and fabrication technique therefor
US5725729A (en) * 1994-09-26 1998-03-10 The Charles Stark Draper Laboratory, Inc. Process for micromechanical fabrication
JPH0973965A (en) * 1995-09-04 1997-03-18 Sumitomo Electric Ind Ltd Cable reel
US5817942A (en) * 1996-02-28 1998-10-06 The Charles Stark Draper Laboratory, Inc. Capacitive in-plane accelerometer
US5892153A (en) * 1996-11-21 1999-04-06 The Charles Stark Draper Laboratory, Inc. Guard bands which control out-of-plane sensitivities in tuning fork gyroscopes and other sensors
US5911156A (en) * 1997-02-24 1999-06-08 The Charles Stark Draper Laboratory, Inc. Split electrode to minimize charge transients, motor amplitude mismatch errors, and sensitivity to vertical translation in tuning fork gyros and other devices
US5783973A (en) * 1997-02-24 1998-07-21 The Charles Stark Draper Laboratory, Inc. Temperature insensitive silicon oscillator and precision voltage reference formed therefrom
US5952574A (en) * 1997-04-29 1999-09-14 The Charles Stark Draper Laboratory, Inc. Trenches to reduce charging effects and to control out-of-plane sensitivities in tuning fork gyroscopes and other sensors
US6340883B1 (en) * 1998-09-03 2002-01-22 Sony/Tektronik Corporation Wide band IQ splitting apparatus and calibration method therefor with balanced amplitude and phase between I and Q
US6539038B1 (en) * 2000-11-13 2003-03-25 Jds Uniphase Corporation Reference frequency quadrature phase-based control of drive level and DC bias of laser modulator
AU2003226083A1 (en) * 2002-03-26 2003-10-13 The Charles Stark Draper Laboratory, Inc. Microelectromechanical sensors having reduced signal bias errors and methods of manufacturing the same
US6823733B2 (en) * 2002-11-04 2004-11-30 Matsushita Electric Industrial Co., Ltd. Z-axis vibration gyroscope
US7505140B2 (en) * 2007-04-13 2009-03-17 Custom Sensors & Technologies, Inc. Indexing dithering mechanism and method
US7548318B2 (en) * 2007-04-13 2009-06-16 Custom Sensors & Technologies, Inc. Dithering mechanism for eliminating zero-rate bias in a gyroscope
US8187902B2 (en) * 2008-07-09 2012-05-29 The Charles Stark Draper Laboratory, Inc. High performance sensors and methods for forming the same
US8259302B2 (en) 2010-07-30 2012-09-04 Honeywell International Inc. Variable path length control modulation frequency
US9310202B2 (en) * 2012-07-09 2016-04-12 Freescale Semiconductor, Inc. Angular rate sensor with quadrature error compensation
US9568318B2 (en) * 2015-04-22 2017-02-14 Honeywell International Inc. Rotationally biased fiber optic gyroscope
CN105093239B (en) * 2015-08-21 2017-07-28 西安空间无线电技术研究所 A kind of Time Delay of Systems error calibration method based on temperature-compensating
CN106153029B (en) * 2016-08-17 2019-02-12 中国船舶重工集团公司第七0七研究所 Two frequency machine shaking laser gyroscope shaking signal cancellation devices
CN112284411B (en) * 2020-09-09 2023-07-28 北京航天时代激光导航技术有限责任公司 Jitter control method of laser inertial measurement unit
CN112665571B (en) * 2020-12-01 2023-10-13 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） Embedded shaking system of laser gyro
CN114910099B (en) * 2022-05-27 2024-01-23 四川图林科技有限责任公司 Method for measuring delay of mechanically-jittered laser gyro control circuit
US11852483B1 (en) 2022-08-12 2023-12-26 Honeywell International Inc. Dither motor apparatus with pickoff embedded drives for ring laser gyroscope

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373650A (en) * 1965-04-02 1968-03-19 Honeywell Inc Laser angular rate sensor
US3743969A (en) * 1969-11-12 1973-07-03 North American Rockwell Modulation servo control for frequency modulated ring laser gyro
US4255054A (en) * 1979-03-21 1981-03-10 The Singer Company Lock-in control system for spring suspended ring laser gyroscope
US4243324A (en) * 1979-03-21 1981-01-06 The Singer Company Feedback system for controlling lock-in in spring suspended ring laser gyroscope
US4248534A (en) * 1979-05-09 1981-02-03 The Singer Company Apparatus and method for the elimination of angular vibration induced errors in ring laser gyroscopes
US4422762A (en) * 1979-11-05 1983-12-27 Litton Systems, Inc. Ring laser
US4309107A (en) * 1980-01-11 1982-01-05 Litton Systems, Inc. Laser gyro dither mechanism
US4314174A (en) * 1980-03-25 1982-02-02 Litton Systems, Inc. Piezoelectric transducer drive having temperature compensation
DE3279480D1 (en) * 1981-07-06 1989-04-06 Honeywell Inc Method and apparatus for angular rate sensing
US4445779A (en) * 1981-07-06 1984-05-01 Honeywell Inc. Dither system for a spring mass system
US4529311A (en) * 1981-07-06 1985-07-16 Honeywell Inc. Ring laser gyro system
US4473297A (en) * 1981-11-12 1984-09-25 The Singer Company Ring laser gyroscope utilizing phase detector for minimizing beam lock-in
US4597667A (en) * 1982-12-09 1986-07-01 Litton Systems, Inc. Dither controller for ring laser angular rotation sensor
US4584652A (en) * 1983-10-07 1986-04-22 Litton Systems, Inc. Apparatus and method for determining in-phase and quadrature-phase components
US4801206A (en) * 1986-06-04 1989-01-31 Litton Systems, Inc. Simplified ring laser gyroscope dither control and method
GB8620943D0 (en) * 1986-08-29 1986-10-08 British Aerospace Signal processing circuits

Also Published As

Publication number Publication date
GB2233145B (en) 1993-12-22
US4981359A (en) 1991-01-01
JP2644067B2 (en) 1997-08-25
FR2648556A1 (en) 1990-12-21
CA2009788C (en) 1999-11-23
GB2233145A (en) 1991-01-02
GB9000914D0 (en) 1990-03-14
FR2648556B1 (en) 1995-10-20
JPH0332076A (en) 1991-02-12

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Legal Events

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