CN109633510A - Satellite-borne magnetometer magnetic environment analysis method based on ground backup single machine - Google Patents
Satellite-borne magnetometer magnetic environment analysis method based on ground backup single machine Download PDFInfo
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- CN109633510A CN109633510A CN201910044500.8A CN201910044500A CN109633510A CN 109633510 A CN109633510 A CN 109633510A CN 201910044500 A CN201910044500 A CN 201910044500A CN 109633510 A CN109633510 A CN 109633510A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a kind of satellite-borne magnetometer magnetic environment analysis methods based on ground backup single machine, by ground backup magnetometer, interval rotates a circle at a certain angle on no magnetic turntable, measure three bearing data of magnetometer of each interval angles, calculating magnetic field vector size；Satellite is placed on no magnetic turntable and is rotated a circle with same angle interval, three bearing data of magnetometer in each interval angles star, calculating magnetic field vector size are measured；The magnetic vector that magnetometer in star measures is subtracted into the magnetic vector that ground backup magnetometer measures, obtaining magnetic field of each angle interval satellite remanent magnetism in star at magnetometer influences size, the arithmetic mean of instantaneous value of each angle calculation result is sought, as satellite residual magnetic field is to the influence at magnetometer.When the magnetic field strength measured is less than the 1/10 of satellite orbit environmental magnetic field intensity, it is believed that whole star remanent magnetism environment without influence, otherwise needs change to be laid out or carry out magnetic optimization design magnetometer.The present invention can provide support for the layout and design optimization of magnetometer.
Description
Technical field
The present invention relates to Satellite Experiment technical fields, and in particular, to satellite remanent magnetism in star magnetometer influence measurement with
Analysis method can refer to use for other spacecrafts.
Background technique
Magnetometer is to measure the sensor of the attitude of satellite on the basis of earth magnetic field.For magnetometer since quality is small, performance can
It leans on, consumption power is low, and operating temperature range is wide and does not have the features such as movable part, has obtained being widely applied very much.Magnetometer
It itself is for measuring magnetic field strength in space environment.Since the magnetic field strength of every bit around the earth can be by earth magnetic
Field model is determined in advance, therefore the information and earth magnetic field model that are measured using the in-orbit magnetometer of satellite are compared, and can be determined
Posture of the satellite relative to earth magnetic field out.
Since earth magnetic field model is only the approximate description to earth magnetic field, using this model as magnetometer survey celestial body appearance
The measurement accuracy of state benchmark is not high.In addition, certain point earth magnetic field intensity is inversely proportional with this away from 3 powers at a distance from the earth's core, because
Earth magnetic field intensity is very weak on this satellite orbital altitude, can be more than the shadow in earth magnetic field when the remanent magnetism inside spacecraft is excessive
It rings, to influence the measurement of magnetometer.
Therefore, the remanent magnetism of single machine on the whole star of strict control and star is on the one hand needed when design of satellites, selects low magnetic on material
Even non-magnetic material；On the other hand layout when magnetometer far from the biggish single machine of remanent magnetism, such as driving mechanism, battery.
In order to provide one more " clean " magnetic field environment to magnetometer, on ground, the development stage answers accurate evaluation satellite
Influence of the remanent magnetism to magnetometer, it is ensured that magnetometer is in-orbit can normal use.Currently, do not find the similar explanation of same this method or
Report is also not yet collected into data similar both at home and abroad.
Summary of the invention
The satellite-borne magnetometer magnetic environment analysis method based on earth magnetism field characteristic that the object of the present invention is to provide a kind of, using defending
Star remanent magnetism influences the constant feature of size and Orientation to magnetometer in star, and it is surplus to solve the analysis satellite under the environmental condition of earth's magnetic field
The problem of magnetic influences magnetometer in star, can provide support for the layout and design optimization of magnetometer.
The purpose of the present invention is achieved through the following technical solutions:
A kind of satellite-borne magnetometer magnetic environment analysis method based on ground backup single machine, includes the following steps:
Step 1: magnetic-field measurement room center will be arranged in without magnetic turntable, backup magnetometer single machine in ground is then placed in nothing
Magnetometer is connect and is connected with ground checkout equipment by the center of magnetic turntable；It is interval rotation without magnetic with 10 ° (or 20 °, 30 °)
Turntable one week, and the measurement data (B in three direction of magnetometer is read in each interval anglesiX, BiY, BiZ) (i=1,2,3 ...,
N), then magnetic intensity vector is at the angle
Step 2: backup magnetometer in ground is removed from no magnetic turntable, and satellite is placed on to the center of no magnetic turntable,
Satellite ground power supply and test equipment are connected, satellite is powered on by in-orbit equilibrium mode and is arranged；Between being with 10 ° (or 20 °, 30 °)
Every rotation without magnetic turntable one week, and the measurement data (B ' in three direction of magnetometer on star is read in each interval anglesiX, B 'iY,
B′iZ) (i=1,2,3 ...), then the magnetic intensity vector at this is
Step 3: due to the superposition that magnetometer measures on star magnetic field strength date is earth's magnetic field and satellite residual magnetic field,
The magnetic field strength that magnetometer on star measures is subtracted into the magnetic field strength that ground backup magnetometer measures, satellite residual magnetic field can be obtained
The magnetic field strength of generation, the satellite residual magnetic field strength vector at this are B "i=B 'i-Bi.Due to the residual magnetic field strength vector of satellite
It is calculated as determination relative to magnetic strength in star, therefore the residual magnetic field strength vector size of satellite isWherein, n is
The angle interval quantity that satellite rotates a circle, B "iFor the satellite residual magnetic field strength vector at each interval angles；
Step 4: referring to GJB/Z 19-1991 " terrestrial space magnetic field ", obtaining the in-orbit environmental magnetic field intensity B of satellite0If
The residual magnetic field strength vector size of satelliteThen satellite remanent magnetism influences magnetometer in star negligible, and adjustment is otherwise needed to defend
Star is laid out or carries out whole star magnetic optimization design, so that satellite influences to meet the requirements on the magnetic field of magnetometer.
Wherein, the LEO space magnetic field intensity of generally below 1000km is about 20000~40000nT, therefore is measured
The magnetic field strength B of satellite remanent magnetism need to be less than 2000nT.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, the present invention solves the problems, such as that satellite remanent magnetism is analyzed under the conditions of ground environment influences magnetometer in star；
2, the present invention provides support for magnetometer ground layout and design optimization.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is satellite-borne magnetometer magnetic environment analysis method flow chart of the embodiment of the present invention based on ground backup single machine.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
As shown in Figure 1, the satellite-borne magnetometer magnetic environment analysis side provided in an embodiment of the present invention based on ground backup single machine
Method influences the constant feature of size and Orientation to magnetometer in star using satellite remanent magnetism, first by ground backup magnetometer in no magnetic
Interval rotates a circle at a certain angle on turntable, measures three bearing data of magnetometer of each interval angles, and calculating magnetic field is sweared
Measure size；Satellite is placed on no magnetic turntable again and is rotated a circle with same angle interval, magnetic in each interval angles star is measured
Qiang Jisan bearing data, and calculating magnetic field vector size；The magnetic vector that magnetometer in star measures is subtracted into ground backup magnetic strength
The magnetic vector measured, magnetic field of each angle interval satellite remanent magnetism in star at magnetometer, which can be obtained, influences size, asks each angle
The arithmetic mean of instantaneous value of calculated result is spent, as satellite residual magnetic field is to the influence at magnetometer.It is defended when the magnetic field strength measured is less than
Star orbital road environmental magnetic field intensity 1/10 when, it is believed that whole star remanent magnetism environment on magnetometer without influence, otherwise need change be laid out or
Carry out magnetic optimization design；Specifically comprise the following steps:
Step 1: arrangement is without magnetic turntable and ground backup magnetometer and debugs.
Specifically, step 1.1: magnetic-field measurement room center will be arranged in without magnetic turntable；
Step 1.2: backup magnetometer single machine in ground being placed in the center of no magnetic turntable, and connected with ground checkout equipment
It connects, be connected；
Step 1.3: being interval rotation with 10 ° (or 20 °, 30 °) reads magnetic without magnetic turntable one week, and in each interval angles
Measurement data (the B in the direction Qiang JisaniX, BiY, BiZ) (i=1,2,3 ..., n), then the magnetic intensity vector at the angle is
Step 2: arrangement satellite is simultaneously connected, is tested；It is specific:
Step 2.1: backup magnetometer in ground is removed from no magnetic turntable；
Step 2.2: satellite being placed on to the center of no magnetic turntable, connects surface power supply and test equipment；
Step 2.3: satellite power-up is configured single machine on star by in-orbit equilibrium mode；
Step 2.4: being interval rotation with 10 ° (or 20 °, 30 °) reads star without magnetic turntable one week, and in each interval angles
Measurement data (the B ' in upper three direction of magnetometeriX, B 'iY, B 'iZ) (i=1,2,3 ...), then the magnetic intensity vector at the angle
For
Step 3: calculating the satellite remanent magnetism field intensity on star at magnetometer, the satellite remanent magnetism field intensity arrow at each interval angles
Measure size B "iAre as follows:
B″i=B 'i-Bi (2)
Then, the satellite residual magnetic field strength vector size B " on star at magnetometer are as follows:
Step 4: assessment satellite residual magnetic field influences magnetometer on star；It is specific:
Step 4.1: referring to GJB/Z 19-1991 " terrestrial space magnetic field ", obtaining the in-orbit environmental magnetic field intensity B of satellite0,
The LEO space magnetic field intensity of generally below 1000km is about 20000~40000nT；
Step 4.2: if the satellite remanent magnetism magnetic field strength B " that magnetometer position generates in star meets:
Then, satellite remanent magnetism influences magnetometer in star negligible, otherwise needs adjustment satellite layout or carries out whole star magnetic optimization
Design need to generally be less than 2000nT so that satellite influences the magnetic field of magnetometer to meet formula (1) requirement.
Specific implementation of the invention is described above.It is to be appreciated that the invention is not limited to above-mentioned spies
Determine embodiment, those skilled in the art can make various deformations or amendments within the scope of the claims, this has no effect on
Substantive content of the invention.
Claims (2)
1. a kind of satellite-borne magnetometer magnetic environment analysis method based on ground backup single machine, which comprises the steps of:
Step 1: magnetic-field measurement room center will be arranged in without magnetic turntable, backup magnetometer single machine in ground is then placed in no magnetic and is turned
Magnetometer is connect and is connected with ground checkout equipment by the center of platform；It is rotated for interval without magnetic turntable one with 10 ° or 20 ° or 30 °
Week, and the measurement data (B in three direction of magnetometer is read in each interval anglesiX, BiY, BiZ) (i=1,2,3 ..., n), then should
Magnetic intensity vector is at angle
Step 2: backup magnetometer in ground being removed from no magnetic turntable, and satellite is placed on to the center of no magnetic turntable, is connected
Satellite ground power supply and test equipment, are powered on satellite by in-orbit equilibrium mode and are arranged；It is rotated with 10 ° or 20 ° or 30 ° for interval
Measurement data (the B ' in three direction of magnetometer on star is read without magnetic turntable one week, and in each interval anglesiX, B 'iY, B 'iZ) (i=
1,2,3 ...), then the magnetic intensity vector at this is
Step 3: calculating the magnetic field strength that satellite residual magnetic field generates, the satellite residual magnetic field strength vector at each interval angles is B "i=
B′i-Bi(i=1,2,3 ..., n), take the satellite remanent magnetism field intensity arithmetic mean of instantaneous value at each interval angles, satellite can be obtained and exist
Residual magnetic field strength vector size in star at magnetometer, specifically:
Wherein, n is the angle interval quantity that satellite rotates a circle, B "iFor the satellite residual magnetic field strength vector at each interval angles；
Step 4: referring to GJB/Z 19-1991 " terrestrial space magnetic field ", obtaining the in-orbit environmental magnetic field intensity B of satellite0IfThen satellite remanent magnetism influences magnetometer in star negligible, otherwise needs adjustment satellite to be laid out or carry out whole star magnetic optimization and sets
Meter, so that satellite influences to meet the requirements on the magnetic field of magnetometer.
2. as described in claim 1 based on the satellite-borne magnetometer magnetic environment analysis method of ground backup single machine, which is characterized in that
The magnetic field strength B of the satellite remanent magnetism measured one need to be less than 2000nT.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693788A (en) * | 2020-05-14 | 2020-09-22 | 国家卫星气象中心(国家空间天气监测预警中心) | Pearson correlation-based satellite-ground lightning comparison system and verification method |
| CN111950144A (en) * | 2020-07-31 | 2020-11-17 | 上海卫星工程研究所 | Low-remanence satellite platform layout method |
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| US5444372A (en) * | 1992-07-22 | 1995-08-22 | Biomagnetic Technologies, Inc. | Magnetometer and method of measuring a magnetic field |
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| CN108802653A (en) * | 2018-06-15 | 2018-11-13 | 上海卫星工程研究所 | Satellite-borne magnetometer magnetic environment analysis method based on earth magnetism field characteristic |
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| US5444372A (en) * | 1992-07-22 | 1995-08-22 | Biomagnetic Technologies, Inc. | Magnetometer and method of measuring a magnetic field |
| CN101452063A (en) * | 2007-12-04 | 2009-06-10 | 北京卫星环境工程研究所 | Satellite residual magnetic moment measurement system in earth magnetic field and measurement method |
| CN104090250A (en) * | 2014-07-25 | 2014-10-08 | 中国科学院空间科学与应用研究中心 | Device and method for measuring remanence and induced magnetism of satellite in magnetism-free space |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693788A (en) * | 2020-05-14 | 2020-09-22 | 国家卫星气象中心(国家空间天气监测预警中心) | Pearson correlation-based satellite-ground lightning comparison system and verification method |
| CN111693788B (en) * | 2020-05-14 | 2022-04-26 | 国家卫星气象中心(国家空间天气监测预警中心) | Pearson correlation-based satellite-ground lightning comparison system and verification method |
| CN111950144A (en) * | 2020-07-31 | 2020-11-17 | 上海卫星工程研究所 | Low-remanence satellite platform layout method |
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