CN104613985B - The method for improving optical fibre gyro interchangeability in navigation system - Google Patents

The method for improving optical fibre gyro interchangeability in navigation system Download PDF

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Publication number
CN104613985B
CN104613985B CN201510075464.3A CN201510075464A CN104613985B CN 104613985 B CN104613985 B CN 104613985B CN 201510075464 A CN201510075464 A CN 201510075464A CN 104613985 B CN104613985 B CN 104613985B
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CN
China
Prior art keywords
optical fibre
fibre gyro
zero
constant multiplier
gyro
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CN201510075464.3A
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Chinese (zh)
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CN104613985A (en
Inventor
李光辉
王树春
田凤
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重庆华渝电气集团有限公司
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Priority to CN201510075464.3A priority Critical patent/CN104613985B/en
Publication of CN104613985A publication Critical patent/CN104613985A/en
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Publication of CN104613985B publication Critical patent/CN104613985B/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C25/00Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
    • G01C25/005Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass initial alignment, calibration or starting-up of inertial devices
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58Turn-sensitive devices without moving masses
    • G01C19/64Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
    • G01C19/72Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers

Abstract

The invention discloses a kind of method for improving optical fibre gyro interchangeability in navigation system, comprise the following steps:1) optical fibre gyro input/output model is set up:F=K* Ω+F0;2) the actual constant multiplier of optical fibre gyro and zero inclined test;3) for optical fibre gyro j, constant multiplier and zero offset compensation are carried out to the output quantity of optical fibre gyro by compensating module, the optical fibre gyro output quantity compensation model of compensating module is:The present invention ensure that the constant multiplier and zero inclined uniformity of the Different Individual of same model optical fibre gyro.

Description

The method for improving optical fibre gyro interchangeability in navigation system

Technical field

The present invention relates to optical fibre gyro interchangeability in fiber-optics gyroscope field, more particularly to a kind of raising navigation system Method.

Background technology

The constant multiplier of optical fibre gyro and zero be partially optical fibre gyro important parameter, must during navigation system application optical fibre gyro The two parameters of optical fibre gyro must be demarcated, by the two parameter read-in navigation calculation programs of optical fibre gyro after demarcation In, with the navigation attitude information of resolving system.The demarcation of navigation system is the work taken very much, and the nominal time typically exists Several weeks, if in calibration process, there is exception or failure, it is necessary to change optical fiber top in some optical fibre gyro even more than the several months Spiral shell, due to the constant multiplier of the gyro after replacing and zero partially with to be replaced the parameter of optical fibre gyro inconsistent, before this can cause Staking-out work is failed, it is necessary to re-scale.

Therefore, for same model optical fibre gyro, the uniformity for improving Different Individual parameter is conducive to improving optical fibre gyro Interchangeability, facilitate the application of navigation system, it is significant for navigation system calibration optical fibre gyro.

The content of the invention

For deficiencies of the prior art, optical fiber in navigation system is improved it is an object of the invention to provide one kind The method of gyro interchangeability, ensure that the constant multiplier and zero inclined uniformity of the Different Individual of same model optical fibre gyro.

In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is such:One kind is improved in navigation system The method of optical fibre gyro interchangeability, it is characterised in that:Comprise the following steps:

1) optical fibre gyro input/output model is set up:

F=K* Ω+F0…………………………(1)

In formula:Ω is the input quantity of optical fibre gyro, and F is optical fibre gyro output quantity, F0Zero for optical fibre gyro is inclined, and K is light The constant multiplier of fine gyro;

2) the actual constant multiplier of optical fibre gyro and zero inclined test:

By turntable M input angle speed Ω is provided to fibre optic gyroscopei, correspondingly the reality of optical fibre gyro is defeated under angular speed Output is Fi,

F0Actual zero for optical fibre gyro is inclined, and K is the actual constant multiplier of optical fibre gyro;

3) for optical fibre gyro j, by 2) testing out its actual output quantity Fj, actual scale factor Kj, and it is actual zero inclined F0j, constant multiplier and zero offset compensation are then carried out to the output quantity of optical fibre gyro by compensating module, wherein, the light of compensating module Fine gyro output quantity compensation model is:

In formula:F'jOutput quantity after being compensated for optical fibre gyro j, KsdFor the standard scale factor of setting.

Compared with prior art, the invention has the advantages that:By presetting standard scale parameter and standard zero partially, Compensated partially by the actual constant multiplier and actual zero of the Different Individual to same model optical fibre gyro, make same model light The constant multiplier of the Different Individual of fine gyro and zero partially partially consistent with the standard scale factor and standard zero of setting, so that light The replacing of fine gyro will not be impacted to the demarcation of navigation system, it is to avoid repeat navigation system calibration, so as to be conducive to The interchangeability of optical fibre gyro is improved, and ensures the stability of navigation system.

Brief description of the drawings

Fig. 1 is theory diagram of the invention.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

Embodiment:Referring to Fig. 1, the method for optical fibre gyro interchangeability, the optical fibre gyro bag in a kind of raising navigation system Light path part, probe portion and debug circuit part are included, carries out being fed back to light path part by debug circuit part, together When exported by output module, and output module is compensated;It specifically includes following steps:

1) optical fibre gyro input/output model is set up:

F=K* Ω+F0…………………………(1)

In formula:Ω is the input quantity of optical fibre gyro, and F is optical fibre gyro output quantity, F0Zero for optical fibre gyro is inclined, and K is light The constant multiplier of fine gyro.

2) the actual constant multiplier of optical fibre gyro and zero inclined test:

By turntable M input angle speed Ω is provided to fibre optic gyroscopei, correspondingly the reality of optical fibre gyro is defeated under angular speed Output is Fi,

F0Actual zero for optical fibre gyro is inclined, and K is the actual constant multiplier of optical fibre gyro.

3) for optical fibre gyro j, by 2) testing out its actual output quantity Fj, actual scale factor Kj, and it is actual zero inclined F0j, constant multiplier and zero offset compensation are then carried out to the output quantity of optical fibre gyro by compensating module, wherein, the light of compensating module Fine gyro output quantity compensation model is:

In formula:F'jOutput quantity after being compensated for optical fibre gyro j, KsdFor standard scale factor, FsdIt is inclined for standard zero;Ksd: The value that constant multiplier will be compensated, such as will compensate to 1000, then the 1000 standard scale factor to set, be compensated 10000, then 10000 be established standardses constant multiplier, and the amount, according to customer demand or depending on being actually needed, is a precognition in advance Value;Also its is handled and (cut zero partially) partially because navigation system calibration goes out gyro zero, therefore directly by standard Zero is set as 0 partially;So, the optical fibre gyro output quantity compensation model of compensating module is:

4) experiment and result of the test

According to method 2) test certain model optical fibre gyro actual constant multiplier and zero partially, then according to method pair 3) The output quantity of certain model optical fibre gyro is compensated, and is then carried out reversely deriving calculating according to the output quantity after compensation, is mended Constant multiplier and zero after repaying is inclined;The constant multiplier and zero inclined data of optical fibre gyro are as shown in table 1 before and after experiment.

The optic fiber gyroscope graduation factor of table 1 and zero inclined data

, it can be seen that being carried out by optical fibre gyro output quantity compensation model after constant multiplier and zero offset compensation, energy from table 1 Enough make the constant multiplier after compensation and zero partially consistent (error range allows interior), so that the replacing of optical fibre gyro will not be to navigation The stability of system is impacted.

Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than restriction technologies side Case, it will be understood by those within the art that, those modify or equivalent substitution to technical scheme, and The objective and scope of the technical program are not departed from, all should be covered among scope of the presently claimed invention.

Claims (1)

1. a kind of method for improving optical fibre gyro interchangeability in navigation system, it is characterised in that:Comprise the following steps:
1) optical fibre gyro input/output model is set up:
F=K* Ω+F0................................(1)
In formula:Ω is the input quantity of optical fibre gyro, and F is optical fibre gyro output quantity, F0Zero for optical fibre gyro is inclined, and K is optical fibre gyro Constant multiplier;
2) the actual constant multiplier of optical fibre gyro and zero inclined test:
By turntable M input angle speed Ω is provided to fibre optic gyroscopei, correspond to the reality output amount of optical fibre gyro under angular speed For Fi,
F0Actual zero for optical fibre gyro is inclined, and K is the actual constant multiplier of optical fibre gyro;
3) for optical fibre gyro j, by 2) testing out its actual output quantity Fj, actual constant multiplier Kj, and actual zero inclined F0j, Then constant multiplier and zero offset compensation are carried out to the output quantity of optical fibre gyro by compensating module, wherein, the optical fiber of compensating module Gyro output quantity compensation model is:
In formula:F'jOutput quantity after being compensated for optical fibre gyro j, KsdFor the standard scale factor of setting.
CN201510075464.3A 2015-02-12 2015-02-12 The method for improving optical fibre gyro interchangeability in navigation system CN104613985B (en)

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CN104613985B true CN104613985B (en) 2017-09-29

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101660910A (en) * 2009-09-30 2010-03-03 北京大学 Low-noise dual-polarization interference optic fiber gyroscope
CN102494681A (en) * 2011-12-06 2012-06-13 北京航空航天大学 Difference double-interference type optical fiber gyroscope based on birefringence modulation
CN102650524A (en) * 2012-04-25 2012-08-29 北京航空航天大学 Differential dual-interference type closed loop fiber optic gyroscope based on birefringence modulation of wide frequency light source

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100494897C (en) * 2006-12-31 2009-06-03 中国航天时代电子公司 Optical fiber gyroscope using mixed optical path of polarization maintaining and low polarization

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101660910A (en) * 2009-09-30 2010-03-03 北京大学 Low-noise dual-polarization interference optic fiber gyroscope
CN102494681A (en) * 2011-12-06 2012-06-13 北京航空航天大学 Difference double-interference type optical fiber gyroscope based on birefringence modulation
CN102650524A (en) * 2012-04-25 2012-08-29 北京航空航天大学 Differential dual-interference type closed loop fiber optic gyroscope based on birefringence modulation of wide frequency light source

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
光纤陀螺标度因数的测试误差分析;那永林等;《中国惯性技术学报》;20120831;第20卷(第4期);第472-477页 *
高精度光纤陀螺标度因数测试研究;林强;《现代导航》;20130630(第3期);第186-190页 *

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