CN105923173B - A kind of GEO satellite external multi-layer insulating assembly earthed system and method - Google Patents
A kind of GEO satellite external multi-layer insulating assembly earthed system and method Download PDFInfo
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- CN105923173B CN105923173B CN201610402583.XA CN201610402583A CN105923173B CN 105923173 B CN105923173 B CN 105923173B CN 201610402583 A CN201610402583 A CN 201610402583A CN 105923173 B CN105923173 B CN 105923173B
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Abstract
A kind of GEO satellite external multi-layer insulating assembly earthed system and method, devise the decision criteria of multilayer insulation component earthing or grounding means quantity on monolithic multilayer insulation component, devising includes the GEO satellite external multi-layer insulating assembly earthed system of multilayer insulation component earthing or grounding means, ground connection crestal line and zero type terminal, devises the installation method for instructing multilayer insulation component ground connection to implement, test criteria.Utilize a kind of GEO satellite external multi-layer insulating assembly earthed system proposed by the present invention and method, on the premise of charging potential control in surface requires during meeting GEO satellite in orbit, it can effectively overcome the ground wire drawn from multilayer insulation component a lot, and limited satellite surface earth point can not meet the contradiction of multilayer insulation component ground wire overlap joint demand, the charging of GEO satellite surface, electric discharge risk can be effectively reduced, greatly reduces the in-orbit exception of the GEO satellite as caused by the charging and discharging effects of surface.
Description
Technical field
The present invention relates to a kind of GEO satellite external multi-layer insulating assembly earthed system and method, belong to satellite spatial environment
Effect protection technology field.
Background technology
GEO satellite in orbit during, complicated space environment will be met with, including surface conductive environment.In GEO
The satellite of height can be hit by space high energy electron and proton, solar wind production of these charged particles from earth dark aspect
Raw space plasma.This electron-like and proton can be that GEO satellite produces surface charged effect, and its charging potential can reach
10000V~20000V, will when charging potential caused by satellite different parts has certain electrical potential difference and exceedes certain threshold value
Surface electrostatic electric discharge can occur.External measurement result shows that the peak point current of surface electrostatic electric discharge is up to 1000A, puts accordingly
Electric field is up to 1000V/m or higher.
Domestic and international aerospace engineering practice have shown that, satellite on-orbit fault there are about it is 70% relevant with space environment, wherein about 30%
It is failure caused by conductive environment.In order to prevent the charged particle in the plasma of space on satellite external multi-layer insulating assembly surface
Accumulation, inequality charging (also referred to as difference charging) is formed, and then cause satellite surface static discharge occurs.By to multilayer every
Hot component is rationally grounded so that the electrostatic charge of satellite surface accumulation is able to be released to satellite structure by impedance path
Earthed system, satellite surface charging potential is reduced, and then reduce the risk that surface electrostatic electric discharge occurs, it is in-orbit so as to reduce satellite
Abnormal generation.
In order to ensure satellite in orbit when multilayer insulation component ground state meet the control of surface charging potential and require,
The ground connection control of multilayer insulation component must be strengthened in satellite development process, including rationally design what is installed on multilayer insulation component
Multilayer insulation component earthing or grounding means quantity, multilayer insulation component earthing or grounding means installation site, ground wire and satellite surface earth point
Overlap joint and quantified controlling index etc..
The setting for the multilayer insulation component earthing or grounding means quantity installed on existing GEO satellite external multi-layer insulating assembly is main
Considering distance, (any point is to multilayer insulation component earthing or grounding means nearest therewith on the component i.e. on every piece of multilayer insulation component
The distance between).Compared with direct read out, the multilayer insulation component installed on domestic GEO satellite multilayer insulation component connects
Ground device quantity is on the low side, and does not account for shadow of the multilayer insulation component size to multilayer insulation component earthing or grounding means quantity
Ring, cause not meeting that the control of GEO satellite surface potential requires in some situations.From the point of view of early stage statistical result, domestic GEO is defended
Star in orbit during, there occurs exception largely related to satellite static discharge.
The external multi-layer insulating assembly earthing mode that existing GEO satellite is taken (directly uses ground wire to be directly grounded
By the multilayer insulation component earthing or grounding means on multilayer insulation component and satellite surface earth point overlap joint get up), generally from multilayer every
The ground wire drawn on hot component is a lot, and the earth point quantity of satellite surface is seldom, causes to be grounded in same satellite surface
Zero excessive type terminal has been overlapped on point or partial earthing line does not just overlap at all, period buries in orbit to GEO satellite
Having descended is caused abnormal risk by surface charging and discharging effects, and this is proved by the in-orbit anomaly statistics data of more GEO satellites.
In existing GEO satellite external multi-layer insulating assembly ground connection implementation process, because installation method is incorrect, easily cause
Multilayer insulation component is damaged, and then influences the thermal control performance of multilayer insulation component；Because test criteria is indefinite, easily cause more
Layer insulating assembly ground connection does not meet electrostatic charge low-resistance leakage path requirement, can not play earthed system control surface charging potential
Effect.
Practice have shown that existing GEO multilayer insulations component earthed system and method can not meet that surface is charged by satellite completely
Control of Electric potentials requirement.When the ground wire quantity drawn from multilayer insulation component is more and more concentrates, and satellite surface is grounded
During point negligible amounts, seem more prominent the drawbacks of existing earthed system and method, GEO satellite can not be met to long-life, height
It is reliable to require.
The content of the invention
Present invention solves the technical problem that it is：Overcome prior art insufficient, there is provided a kind of heat-insulated group of GEO satellite external multi-layer
Part earthed system and method, meet that GEO satellite is led to long-life, highly reliable requirement, the powered static discharge that produces of satellite surface
The in-orbit exception caused substantially reduces.
The technical scheme that the present invention solves is：A kind of GEO satellite external multi-layer insulating assembly earthed system and method, bag
Include：Multilayer insulation component earthing or grounding means, ground connection crestal line, zero type terminal；
Multilayer insulation component earthing or grounding means, including：Metallic gasket, unidirectional weld tabs, it is grounded aluminum foil strip, hollow copper rivet, connects
Ground wire component；
Grounding wire component, including：Ground wire, single contact pin, single jack；
Ground connection aluminum foil strip is converted into the end to end shape of multiple zigzags, forms multiple breaks, by hollow copper rivet insertion simultaneously
After the shape end to end through zigzag, metallic gasket is penetrated at the both ends of hollow copper rivet, ground connection aluminum foil strip can be fixed
With multilayer insulation component；Unidirectional weld tabs is fixed on metallic gasket, makes conduction between unidirectional weld tabs and metallic gasket, from unidirectional weldering
Piece draws ground wire, that is, the one end being grounded connects unidirectional weld tabs, and this piece-root grafting ground wire other end connects the terminals of single contact pin,
The inserted terminal of single jack can connect the inserted terminal of single contact pin；The terminals of single jack pass through ground wire and ground connection crestal line
It is connected；Ground connection crestal line is connected by zero type terminal with satellite surface earth point, that is, is grounded one end and the zero type terminal connections of crestal line
End is connected, and zero type terminal snaps into satellite surface earth point again；
One end of single contact pin is needle-like inserted terminal, and the other end is terminals；One end of single jack is pass inserted terminal,
The other end is terminals；The inserted terminal of the inserted terminal of single jack and single contact pin matches, and can be plugged in together and form
Conductive path；
In ground connection aluminum foil strip insertion multilayer insulation component in multilayer insulation component earthing or grounding means, make ground connection aluminum foil strip with it is anti-
Penetrate screen surfaces conductive contact；Rivet over metallic gasket, ground connection aluminum foil strip, multilayer insulation component ground connection dress successively with hollow copper rivet again
The unidirectional weld tabs put, metallic gasket, unidirectional weld tabs keep conductive with the facial mask with multilayer insulation component, hollow copper rivet respectively
Contact, multilayer insulation component is set to form conductive path with multilayer insulation component earthing or grounding means；
Satellite in orbit during the facial mask of multilayer insulation component, the electrostatic charge that accumulates on radiation shield by being grounded aluminium foil
Bar, hollow copper rivet, metallic gasket, unidirectional weld tabs, grounding wire component, ground connection crestal line, zero type terminal are released to satellite structure and connect
Ground system (SGS)；
When the area coverage of the monolithic multilayer insulation component is in 100cm2Within when, on the multilayer insulation component at least
1 multilayer insulation component earthing or grounding means is installed；When the area coverage of the monolithic multilayer insulation component is in 100cm2To 400cm2It
Between when, 2 multilayer insulation component earthing or grounding means are at least installed on the multilayer insulation component；When the monolithic multilayer insulation component
Area coverage in 400cm2To 1600cm2Between when, 3 multilayer insulation components are at least installed on the multilayer insulation component and connect
Ground device；When the cross-sectional area of the monolithic multilayer insulation component is more than 1600cm2When, at least pacify on the multilayer insulation component
Fill 4 multilayer insulation component earthing or grounding means.
The ground connection crestal line selects the Φ 1mm silver-plated bare wire of sub-thread copper, and the ground wire being connected with single jack selects section
Product is 0.1mm2~0.14mm2Wire, the ground wire being connected with single jack nearby hook be welded in ground connection crestal line on, that is, be grounded
One end be first wrapped in ground connection crestal line on, then earth wire be grounded crestal line wound section welded.
When the multilayer insulation component facial mask for one side with ITO aluminize polyimide film when, i.e. the surface of facial mask is electric
Resistance rate is not more than 1 × 106Ω/, N number of multilayer insulation component earthing or grounding means is installed, make on facial mask any point to the point most
The distance between near multilayer insulation component earthing or grounding means cannot be greater than 1000mm；
When facial mask is the polyimide film of high surface resistivity, i.e., surface resistivity is more than 1 × 106Ω/, but less
In 1 × 108During Ω/, M multilayer insulation component earthing or grounding means is set, make any point on facial mask to the point recently more
The distance between layer insulating assembly earthing or grounding means cannot be greater than 600mm.
N number of or M multilayer insulation component earthing or grounding means on multilayer insulation component is evenly distributed on multilayer insulation component,
When the area coverage of the monolithic multilayer insulation component is in 100cm2Within when, installation max (1, N, M) individual multilayer insulation component connect
Ground device；When the area coverage of the monolithic multilayer insulation component is in 100cm2To 400cm2Between when, installation max (2, N, M) it is individual
Multilayer insulation component earthing or grounding means；When the area coverage of the monolithic multilayer insulation component is in 400cm2To 1600cm2Between when,
Max (3, N, M) individual multilayer insulation component earthing or grounding means is installed；When the area coverage of the monolithic multilayer insulation component exceedes
1600cm2When, max (4, N, M) individual multilayer insulation component earthing or grounding means is installed.
When multilayer insulation component earthing or grounding means is located at multilayer insulation module edge, multilayer insulation component earthing or grounding means away from should
10mm~25mm apart from the edge of multilayer insulation component.
Ground connection crestal line should be cemented on satellite structure, the following requirements setting that should stand of cementation point position：
(1) ground connection crestal line on, the lateral extent solder joint of ground lead hook solder joint two about 20mm at it is each set a cementation point；
(2) other parts on ground connection crestal line set a cementation point every about 70mm；
(3) a cementation point is set apart from satellite surface earth point on ground connection crestal line about at 70mm；
After the completion of cementation, GD414 silicon rubber is coated on ground wire hook solder joint, it is ensured that do not scratch multilayer insulation group at hook weldering
Part.Naked hand contact wire metal surface should be avoided in operating process, prevents from polluting.Scolding tin, cementation glue should meet satellite surface
Environment, radiation environment requirement, cementation glue should have enough adhesive strengths.Be grounded crestal line on adjacent cementation point and cementation point with
Wire between satellite surface earth point should leave certain curved arc, and ensure that being grounded crestal line is not present hard bending.
After the tubular rivet of multilayer insulation component earthing or grounding means installs, uniformly selected in every piece of multilayer insulation assembly surface
Take and tested no less than 6 test points；Earthed system conducting resistance is surveyed after single contact pin, single jack grafting
Examination.When meeting following 3 conditions simultaneously, judge that earthed system meets the requirements：
(1) DC resistance between each test point and neighbouring multilayer insulation component earthing or grounding means hollow copper rivet must not be big
In 1M Ω；
(2) DC resistance between multilayer insulation component radiation shield and multilayer insulation component earthing or grounding means hollow copper rivet
Less than 80 Ω；
(3) multilayer insulation component passes through multilayer insulation component earthing or grounding means, grounding wire component, ground connection crestal line and zero type terminal
Be connected to satellite structure earthed system (SGS), it should be ensured that multilayer insulation component earthing or grounding means to satellite structure earthed system (SGS) it
Between DC resistance be less than 1 Ω.
A kind of GEO satellite external multi-layer insulating assembly earthing method, step are as follows：
(1) the multilayer insulation component earthing or grounding means quantity on monolithic multilayer insulation component is designed, completes multilayer insulation component
Earthing or grounding means is installed, and list is connected respectively by label from the ground wire that individual event weld tabs is drawn with the ground wire being connected on ground connection crestal line
Core contact pin, jack；
(2) ground wire being connected with ground connection crestal line is connected on ground connection crestal line nearby by way of hook weldering, and ground connection crestal line leads to
Cross zero type terminal and be fixed on satellite surface earth point, cementation is carried out to ground connection crestal line, single contact pin is inserted into single jack；
(3) suitable grounding resistance measuring method is selected, is carried out according to the measurement request proposed in the art of this patent scheme
Grounding resistance measures；
(4) after test confirms that earthed system meets the requirements, it is enclosed on single contact pin with heat-shrinkable T bush, on single jack and blows
Shorten type into；
(5) ground wire and ground connection crestal line are arranged, line is all put between multilayer insulation component and satellite capsule plate, in multilayer
The not exposed unnecessary line in insulating assembly outer surface.
The present invention compared with prior art the advantages of be：
(1) present invention determines installation multilayer insulation component earthing or grounding means according to monolithic multilayer insulation component area coverage size
The decision criteria of quantity is more accurate, more meets the charging potential control of external multi-layer insulating assembly surface requires；
(2) present invention specify that the hook weldering mode of ground connection crestal line, the type selecting of ground wire and ground wire and ground connection crestal line, can have
Effect evades the randomness in ground connection implementation process.
(3) present invention according to multilayer insulation component facial mask surface resistivity characteristic, it is specified that from facial mask any point to
Different distance requirement between the multilayer insulation component earthing or grounding means nearest with the point, new demand require tightened up each conjunction than existing
Reason (existing requirement be general be defined as 2000mm), is more beneficial for reducing GEO surfaces charging potential.
(4) present invention is considered using any on GEO satellite external multi-layer insulating assembly area coverage size and facial mask
A little two kinds of sides of multilayer insulation component earthing or grounding means quantity are determined to the multilayer insulation component earthing or grounding means distance nearest with the point
Method, the drawbacks of surface charging potential control requires can not be met under special circumstances by avoiding single method.
(5) present invention specify that quantization requirement of the multilayer insulation component earthing or grounding means apart from edge, can effectively evade ground connection
Due to requiring the indefinite risk brought in implementation process, while can avoid damaging multilayer insulation group due to too close edge
Part.
(6) present invention to ground connection crestal line propose cementation requirement, and propose how the quantization requirement of cementation point position, energy
Effectively evade ground connection implementation process in due to requiring the indefinite risk brought, while can avoid due to ground connection crestal line not cementation and
The risk of damage is caused to multilayer insulation component.
(7) present invention is for the electrostatic charge that is accumulated on the facial mask of multilayer insulation component, radiation shield to satellite structure ground connection
System SGS leakage path, the quantization requirement of different parts electric conductivity is respectively provided so that ground connection implementation result is commented
Sentence with more operability, be more beneficial for ensuring that charge discharging resisting passage meets that surface potential control requires.
(8) present invention is provided with single contact pin and single jack in grounding wire component, is more beneficial for multilayer insulation component
Ground connection is implemented, and avoids ground wire from pulling damage multilayer insulation component.
(9) present invention devises the decision criteria of multilayer insulation component earthing or grounding means quantity on monolithic multilayer insulation component.
Design monolithic multilayer insulation component on install multilayer insulation component earthing or grounding means quantity when, while consider distance factor and
Two factors of multilayer insulation component area coverage, drawback caused by considering distance or consideration area coverage merely is avoided, is made
It is more reasonable to obtain the multilayer insulation component earthing or grounding means quantity installed on multilayer insulating assembly, more meets GEO satellite surface charging electricity
Position control requires.
(10) present invention devises the GEO satellite for including multilayer insulation component earthing or grounding means, ground connection crestal line and zero type terminal
External multi-layer insulating assembly earthed system.By using the external multi-layer earthed system of crestal line with ground, effectively overcome from more
The ground wire drawn on layer insulating assembly is a lot, and limited satellite surface earth point can not meet that multilayer insulation component is grounded
The contradiction of overlap joint demand so that the ground connection of insulating assembly implements to have more engineering feasibility.
(11) present invention devises the installation method for instructing multilayer insulation component ground connection to implement, and it is heat-insulated to overcome external multi-layer
Component earthed system installation method incorrect the drawbacks of multilayer insulation component being damaged；Propose to earthed system low-resistance
The test criteria of characteristic so that explicit evaluation yardstick is provided with to ground connection implementation, can ensure that and deposited on multilayer insulation component
Electrostatic charge have and be released to satellite structure earthed system SGS low impedance path.
Brief description of the drawings
Fig. 1 multilayer insulation modular constructions of the present invention and composition schematic diagram；
Fig. 2 multilayer insulation component earthing or grounding means composition schematic diagrams of the present invention；
Fig. 3 grounding wire component composition schematic diagrams of the present invention；
The ground connection crestal line cementation schematic diagram of Fig. 4 present invention；
The multilayer insulation component earthed system schematic diagram of the crestal line with ground of Fig. 5 present invention.
Embodiment
The present invention basic ideas be：A kind of GEO satellite external multi-layer insulating assembly earthed system and method, consider
GEO satellite external multi-layer insulating assembly area coverage size, multilayer insulation component facial mask surface resistivity and satellite surface charging
Control of Electric potentials requirement, devise the decision criteria of multilayer insulation component earthing or grounding means quantity on monolithic multilayer insulation component, design
Include the GEO satellite external multi-layer insulating assembly ground connection system of multilayer insulation component earthing or grounding means, ground connection crestal line and zero type terminal
System, devise the installation method for instructing multilayer insulation component ground connection to implement, test criteria.Utilize a kind of GEO proposed by the present invention
Satellite external multi-layer insulating assembly earthed system and method, the surface charging potential control during meeting GEO satellite in orbit
On the premise of it is required that, it can effectively overcome the ground wire drawn from multilayer insulation component a lot, and limited satellite surface ground connection
Point can not meet the contradiction of multilayer insulation component ground wire overlap joint demand, can effectively reduce the charging of GEO satellite surface, electric discharge wind
Danger, greatly reduces the in-orbit exception of the GEO satellite as caused by the charging and discharging effects of surface.
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings
A kind of GEO satellite external multi-layer insulating assembly (see Fig. 1) earthed system and method, earthed system is by multilayer insulation group
Part earthing or grounding means, ground connection crestal line, zero type terminal composition, wherein multilayer insulation component earthing or grounding means (see Fig. 2) include metallic gasket,
Unidirectional weld tabs, ground connection aluminum foil strip, hollow copper rivet, grounding wire component (see Fig. 3), grounding wire component include ground wire, single again
Contact pin, single jack.Earthing method includes installing how many individual multilayer insulation component earthing or grounding means on monolithic multilayer insulation component
Decision criteria, utilize the multilayer insulation component earthing mode and installation method (see Fig. 4, Fig. 5), multilayer insulation component for being grounded crestal line
Ground state test criteria and method etc..
1st, multilayer insulation component earthing or grounding means quantity is determined
It should be controlled before GEO external multi-layers insulating assembly ground connection is carried out according to satellite surface charging potential and require design monolithic
The multilayer insulation component earthing or grounding means quantity installed on multilayer insulation component.Multilayer insulation component earthing or grounding means quantity number it is straight
Connect the controlled level determined to multiple-level surface charging potential.At present, the country is charging potential the adjacent regions of GEO satellite surface
Control requirement be less than 300V, NASA regulations are less than 500V.Charging potential controls lower, and the risk of surface-discharge occurs
It is lower, consider certainly from engineering construction angle, be not more low better, and install multilayer insulation component earthing or grounding means it
The thermal control performance of multilayer insulation component itself can't be influenceed afterwards, therefore, multilayer insulation component earthing or grounding means determination of amount must
Many factors must be considered.
When calculating GEO satellite surface charging potential, typically according to the exposed multilayer insulation component in satellite external surface
Size, in conjunction with the space charged particle (be typically electronics) for inciding multilayer insulation assembly surface current density (i.e.
The surface density of charging current), surface charging potential value is finally calculated, therefore, big by multilayer insulation component area coverage
Small determination multilayer insulation component earthing or grounding means quantity is that science also allows for instructing engineering development.According to method provided by the invention,
Multilayer insulation component earthing or grounding means quantity is first determined according to multilayer insulation component area coverage, it is specific as follows：
(1) when the area coverage of monolithic multilayer insulation component is in 100cm2Within when, on the multilayer insulation component at least
1 multilayer insulation component earthing or grounding means is installed；
(2) when the area coverage of monolithic multilayer insulation component is in 100cm2To 400cm2Between when, in the multilayer insulation component
On 2 multilayer insulation component earthing or grounding means are at least installed；
(3) when the area coverage of monolithic multilayer insulation component is in 400cm2To 1600cm2Between when, in the multilayer insulation group
3 multilayer insulation component earthing or grounding means are at least installed on part；
(4) when the cross-sectional area of monolithic multilayer insulation component is more than 1600cm2When, at least pacify on the multilayer insulation component
Fill 4 multilayer insulation component earthing or grounding means.
Determined further according to the distance between any point on facial mask to the multilayer insulation component earthing or grounding means nearest with the point
Multilayer insulation component earthing or grounding means quantity, it is specific as follows：
(1) when the multilayer insulation component facial mask for the one side with ITO aluminize polyimide film when, i.e. the surface of facial mask
Resistivity is not more than 1 × 106Ω/, N number of multilayer insulation component earthing or grounding means is installed, make on facial mask any point to the point
The distance between nearest multilayer insulation component earthing or grounding means cannot be greater than 1000mm；
(2) when facial mask is the polyimide film of high surface resistivity, i.e., surface resistivity is more than 1 × 106Ω/, but
No more than 1 × 108During Ω/, M multilayer insulation component earthing or grounding means is set, makes on facial mask any point to nearest with the point
The distance between multilayer insulation component earthing or grounding means cannot be greater than 600mm.
It is simple certain drawback to be present according to area and apart from determination multilayer insulation component earthing or grounding means quantity such as one piece thin
The multilayer insulation component of strip, 1 multilayer insulation component earthing or grounding means may only be needed according to area, need are possible to according to distance
Want 2 multilayer insulation component earthing or grounding means.Obviously, if setting 1 multilayer insulation component earthing or grounding means, there will be high surface to fill
Electric potential risk.
Therefore, according to method provided by the invention, the multilayer insulation group determined respectively in above-mentioned two situations is considered
Part earthing or grounding means quantity, maximum number therein is taken so to be avoided merely according to area and distance as final design load
The drawbacks of determining multilayer insulation component earthing or grounding means quantity, it is specific as follows：
(1) when the area coverage of the monolithic multilayer insulation component is in 100cm2Within when, installation max (1, N, M) it is individual more
Layer insulating assembly earthing or grounding means；
(2) when the area coverage of monolithic multilayer insulation component is in 100cm2To 400cm2Between when, installation max (2, N, M) it is individual
Multilayer insulation component earthing or grounding means；
(3) when the area coverage of monolithic multilayer insulation component is in 400cm2To 1600cm2Between when, install max (3, N, M)
Individual multilayer insulation component earthing or grounding means；
(4) when the area coverage of monolithic multilayer insulation component is more than 1600cm2When, max (4, N, M) individual multilayer insulation is installed
Component earthing or grounding means.
It can be proved based on Ohm's law by calculating, the multilayer insulation component earthing or grounding means number determined by the above method
Amount can meet requirement of the GEO satellite surface charging potential control in below 300V.
2nd, the multilayer insulation component based on ground connection crestal line, which is grounded, to be implemented
Using the multilayer insulation component earthing mode based on ground connection crestal line, efficiently solve on multilayer insulation component multilayer every
Hot component earthing or grounding means is more and concentrates, and problem during satellite surface earth point negligible amounts.Such as to installing on satellite
Big reflector antenna, the multilayer insulation component block number of its back side cladding is more, connects multilayer insulation component earthing or grounding means quantity nature
Also it is more, in this case, if many drawbacks be present using traditional direct grounding way.First from multilayer insulation component
The ground wire quantity of extraction is more, length length, necessarily causes the increase of weight, and for satellite, weight is critically important money
Source, it is necessary to strict control；Secondly, largely it is grounded from multilayer insulation component and is directly connected to satellite body, excessively thick wire harness
The normal rotation of antenna and satellite junction hinge will be influenceed, the hidden danger for influenceing antenna performance be present；Again, satellite surface connects
Place limited amount, the quantity for the earth point that can be connected on each earth point also have strict demand (being typically no more than 4), this
Sample will cause partial earthing line to cannot connect to satellite structure earthed system (SGS), and this does not obviously meet the charging of GEO satellite surface
Control of Electric potentials requirement.
When carrying out the ground connection implementation of multilayer insulation component in the satellite assembly stage, ground connection aluminum foil strip is converted into multiple zigzags
End to end shape, multiple breaks are formed, by ground connection aluminum foil strip insertion multilayer insulation component, make ground connection aluminum foil strip and reflection
Screen surfaces conductive contact.The end to end shape of zigzag will be inserted through with hollow copper rivet again, rivets over metal gasket successively
Piece, ground connection aluminum foil strip, the unidirectional weld tabs of multilayer insulation component earthing or grounding means, can fix ground connection aluminum foil strip and multilayer insulation group
Part.Unidirectional weld tabs is fixed on metallic gasket, makes conductive between unidirectional weld tabs and metallic gasket, metallic gasket, unidirectional weld tabs point
Conductive contact is not kept with the facial mask with multilayer insulation component, hollow copper rivet, makes multilayer insulation component and multilayer insulation group
Part earthing or grounding means forms conductive path.When multilayer insulation component earthing or grounding means is located at multilayer insulation module edge, multilayer insulation
Component earthing or grounding means away from should apart from the edge of multilayer insulation component 10mm~25mm, can so avoid multilayer insulation component be grounded
Device tears multilayer insulation component too close to edge.
One end of single contact pin is needle-like inserted terminal, and the other end is terminals, draws and is grounded from unidirectional weld tabs, that is, is grounded
One end of line connects unidirectional weld tabs, and this piece-root grafting ground wire other end connects the terminals of single contact pin.See Fig. 2, Fig. 3.Single jack
One end be pass inserted terminal, the other end is terminals, and the inserted terminal of the inserted terminal and single contact pin of single jack matches, energy
Enough it is plugged in together and forms conductive path.The terminals of single jack are connected by ground wire with ground connection crestal line, are grounded crestal line
It is connected by zero type terminal with satellite surface earth point, that is, the one end for being grounded crestal line is connected with zero type terminal connections end, zero type end
Son snaps into satellite surface earth point again.See Fig. 5.
The silver-plated bare wire of sub-thread copper that crestal line selects Φ 1mm is grounded, can both ensure to be grounded the good electric conductivity of crestal line,
Space static electricity electric charge caused by tape insulation layer conductor can be avoided is insulating medium layer accumulates the problem of.It is connected with single jack
Ground wire is 0.1mm from sectional area2~0.14mm2Wire, hook is welded in ground connection ridge to the ground wire being connected with single jack nearby
On line, that is, the one end being grounded first is wrapped on ground connection crestal line, then earth wire is welded with ground connection crestal line wound section, this
Sample may insure that ground wire reliably overlaps with being grounded crestal line, be resistant to satellite force environmental test and the severe dynamics of transmitter section
Drag force that may be present during environment and satellite assembly.Otherwise, if ground wire and ground connection crestal line overlap joint are insecure, lead
Cause to disconnect between the two or electric conductivity is poor, if follow-up be improved again will be pretty troublesome and to expend more time；If
Disconnected in launching phase, will result directly in corresponding multilayer insulation assembly surface charge control measure failure.
Why ground connection crestal line is cemented on satellite structure, mainly avoid being grounded crestal line in satellite assembly, whole star power
Learn Free Slosh in environmental test and emission process and destroy multilayer insulation component, and then influence the thermal control of multilayer insulation component
Energy；It can also avoid being grounded simultaneously between crestal line and ground wire and be disconnected due to pulling or reduce electric conductivity.Rationally set viscous
Solid point position is very crucial, and above mentioned problem can be avoided by carrying out ground connection crestal line cementation according to method provided by the invention.
After the completion of cementation, GD414 silicon rubber is coated on ground wire hook solder joint, it is ensured that do not scratch multilayer insulation group at hook weldering
Part.Naked hand contact wire metal surface should be avoided in operating process, prevents from polluting.Scolding tin, cementation glue should meet satellite surface
Environment, radiation environment requirement, cementation glue should have enough adhesive strengths.Be grounded crestal line on adjacent cementation point and cementation point with
Wire between satellite surface earth point should leave certain curved arc, and ensure that being grounded crestal line is not present hard bending, so can be with
Stress rupture earth lead and satellite structure caused by what is met with during preventing due to satellite in orbit drastically expand with heat and contract with cold etc.
Surface.
Due to being provided with single contact pin and single jack in grounding wire component, so that be grounded in multilayer insulation component
The installation of device and ground connection crestal line cementation can independently be carried out, and implement and be grounded crestal line completing the thermal control of multilayer insulation component
After cementation, it is only necessary to single contact pin is inserted into single jack, so can be effectively during evasive action due to cable
More and imprudence pulls damage multilayer insulation component, this method is confirmed during satellite assembly, positive effect.
So far, it is established that the electrostatic charge from satellite external multi-layer insulating assembly to satellite structure earthed system (SGS) is let out
Put passage.After test confirms that the conductive path resistances of earthed system meet the requirements, single contact pin, single are enclosed on heat-shrinkable T bush
On jack and the type of shortening into is blown, so can be that single contact pin and the reliable grafting of single jack increase by a heavy safeguard measure.Finally, it is whole
Reason ground wire and ground connection crestal line, line are all put between multilayer insulation component and satellite capsule plate, in multilayer insulation component appearance
The not exposed unnecessary line in face.
3rd, earthed system conducting performance test
Electrostatic charge leakage path from satellite external multi-layer insulating assembly to satellite structure earthed system (SGS) must be
Low resistance path, it otherwise will be unfavorable for electrostatic charge and release, and cause surface charging potential rise, and then increase satellite surface electric discharge
Risk.In implementation process is grounded, due to operating lack of standardization or work careless omission, it is possible to partial earthing line be present and miss or take
Connect bad.For this must regulation earthed system electric conductivity and tested.
According to method provided by the invention, after the tubular rivet of multilayer insulation component earthing or grounding means installs, every
Block multilayer insulation assembly surface is uniformly chosen and tested no less than 6 test points；After single contact pin, single jack grafting
Earthed system conducting resistance is tested.When meeting following 3 conditions simultaneously, judge that earthed system meets the requirements：
(1) DC resistance between each test point and neighbouring multilayer insulation component earthing or grounding means hollow copper rivet must not be big
In 1M Ω；
(2) DC resistance between multilayer insulation component radiation shield and multilayer insulation component earthing or grounding means hollow copper rivet
Less than 80 Ω；
(3) multilayer insulation component passes through multilayer insulation component earthing or grounding means, grounding wire component, ground connection crestal line and zero type terminal
Be connected to satellite structure earthed system (SGS), it should be ensured that multilayer insulation component earthing or grounding means to satellite structure earthed system (SGS) it
Between DC resistance be less than 1 Ω.
GEO satellite external multi-layer insulating assembly earthed system and method proposed by the present invention are defended in more GEO communications
It is applied in star.When whole star general assembly process carries out multilayer insulation component ground connection and implemented, more convenient operation, test criteria is bright
Really, test data bag is more complete.It is quiet by the powered generation of satellite surface from the point of view of the anomaly statistics result during satellite is in orbit
In-orbit exception substantially reduces caused by discharge of electricity, overall to reduce about 80%, positive effect.
Claims (6)
- A kind of 1. GEO satellite external multi-layer insulating assembly earthed system, it is characterised in that including：Multilayer insulation component ground connection dress Put, be grounded crestal line, zero type terminal；Multilayer insulation component earthing or grounding means, including：Metallic gasket, unidirectional weld tabs, ground connection aluminum foil strip, hollow copper rivet, ground wire Component, facial mask；Grounding wire component, including：Ground wire, single contact pin, single jack；Ground connection aluminum foil strip is converted into the end to end shape of multiple zigzags, forms multiple breaks, hollow copper rivet is inserted through After the end to end shape of zigzag, metallic gasket is penetrated at the both ends of hollow copper rivet, ground connection aluminum foil strip and more can be fixed Layer insulating assembly；Unidirectional weld tabs is fixed on metallic gasket, is made conduction between unidirectional weld tabs and metallic gasket, is drawn from unidirectional weld tabs Go out ground wire, that is, the one end being grounded connects unidirectional weld tabs, and this piece-root grafting ground wire other end connects the terminals of single contact pin, single The inserted terminal of jack can connect the inserted terminal of single contact pin；The terminals of single jack are by ground wire with being grounded crestal line phase Even；Ground connection crestal line is connected by zero type terminal with satellite surface earth point, that is, is grounded one end and zero type terminal connections end of crestal line It is connected, zero type terminal snaps into satellite surface earth point again；One end of single contact pin is needle-like inserted terminal, and the other end is terminals；One end of single jack is pass inserted terminal, another Hold as terminals；The inserted terminal of the inserted terminal of single jack and single contact pin matches, and can be plugged in together and form conduction Path；In ground connection aluminum foil strip insertion multilayer insulation component in multilayer insulation component earthing or grounding means, make ground connection aluminum foil strip and radiation shield Surface conductance contacts；Rivet over metallic gasket, ground connection aluminum foil strip, multilayer insulation component earthing or grounding means successively with hollow copper rivet again Unidirectional weld tabs, the facial mask with multilayer insulation component, hollow copper rivet keep conductive contact respectively for metallic gasket, unidirectional weld tabs, Multilayer insulation component is set to form conductive path with multilayer insulation component earthing or grounding means；Satellite in orbit during the facial mask of multilayer insulation component, the electrostatic charge that accumulates on radiation shield by be grounded aluminum foil strip, The impedance path that hollow copper rivet, metallic gasket, unidirectional weld tabs, grounding wire component, ground connection crestal line, zero type terminal are formed is released To satellite structure earthed system (SGS)；When the area coverage of monolithic multilayer insulation component is in 100cm2Within when, at least installed more than 1 on the multilayer insulation component Layer insulating assembly earthing or grounding means；When the area coverage of the monolithic multilayer insulation component is in 100cm2To 400cm2Between when, at this 2 multilayer insulation component earthing or grounding means are at least installed on multilayer insulation component；When the coverage rate of the monolithic multilayer insulation component Product is in 400cm2To 1600cm2Between when, 3 multilayer insulation component earthing or grounding means are at least installed on the multilayer insulation component；When The area coverage of the monolithic multilayer insulation component is more than 1600cm2When, 4 multilayers are at least installed on the multilayer insulation component Insulating assembly earthing or grounding means；When the multilayer insulation component facial mask for the one side with ITO aluminize polyimide film when, i.e. the surface resistivity of facial mask It is not more thanN number of multilayer insulation component earthing or grounding means is installed, make any point on facial mask to nearest more of the point The distance between layer insulating assembly earthing or grounding means cannot be greater than 1000mm；When facial mask is the polyimide film of high surface resistivity, i.e., surface resistivity is more thanBut it is not more thanWhen, M multilayer insulation component earthing or grounding means is set, make on facial mask any point to the multilayer nearest with the point every The distance between hot component earthing or grounding means cannot be greater than 600mm；N number of or M multilayer insulation component earthing or grounding means on multilayer insulation component is evenly distributed on multilayer insulation component, works as institute The area coverage of monolithic multilayer insulation component is stated in 100cm2Within when, installation max (1, N, M) individual multilayer insulation component ground connection dress Put；When the area coverage of the monolithic multilayer insulation component is in 100cm2To 400cm2Between when, install max (2, N, M) individual multilayer Insulating assembly earthing or grounding means；When the area coverage of the monolithic multilayer insulation component is in 400cm2To 1600cm2Between when, installation The individual multilayer insulation component earthing or grounding means of max (3, N, M)；When the area coverage of the monolithic multilayer insulation component is more than 1600cm2 When, max (4, N, M) individual multilayer insulation component earthing or grounding means is installed.
- A kind of 2. GEO satellite external multi-layer insulating assembly earthed system according to claim 1, it is characterised in that：It is described The silver-plated bare wire of sub-thread copper that crestal line selects Φ 1mm is grounded, the ground wire being connected with single jack is 0.1mm from sectional area2~ 0.14mm2Wire, the ground wire being connected with single jack nearby hook be welded in ground connection crestal line on, that is, the one end being grounded first is wound On ground connection crestal line, then earth wire is welded with ground connection crestal line wound section.
- A kind of 3. GEO satellite external multi-layer insulating assembly earthed system according to claim 1, it is characterised in that：Work as institute When stating multilayer insulation component earthing or grounding means and being located at multilayer insulation module edge, multilayer insulation component earthing or grounding means should apart from multilayer every Edge 10mm~25mm of hot component.
- A kind of 4. GEO satellite external multi-layer insulating assembly earthed system according to claim 1, it is characterised in that：Ying Jiang The ground connection crestal line is cemented on satellite structure, and cementation point position is set according to following requirements：(1) ground connection crestal line on, ground wire the lateral extent solder joint of hook solder joint two about 20mm at it is each set a cementation point；(2) other parts on ground connection crestal line set a cementation point every about 70mm；(3) a cementation point is set apart from satellite surface earth point on ground connection crestal line about at 70mm；After the completion of cementation, GD414 silicon rubber is coated on ground wire hook solder joint, it is ensured that multilayer insulation component is not scratched at hook weldering, Naked hand contact wire metal surface should be avoided in operating process, prevents from polluting, scolding tin, cementation glue should meet satellite surface ring Border, radiation environment requirement, cementation glue should have enough adhesive strengths, and adjacent cementation point and cementation point are with defending on ground connection crestal line Wire between the earth point of star catalogue face should leave certain curved arc, and ensure that being grounded crestal line is not present hard bending.
- A kind of 5. GEO satellite external multi-layer insulating assembly earthed system according to claim 1, it is characterised in that：It is described After the hollow copper rivet of multilayer insulation component earthing or grounding means installs, uniformly chosen in every piece of multilayer insulation assembly surface many Tested in 6 test points；Earthed system conducting resistance is tested after single contact pin, single jack grafting, when When meeting following 3 conditions simultaneously, judge that earthed system meets the requirements：(1) DC resistance between each test point and neighbouring multilayer insulation component earthing or grounding means hollow copper rivet cannot be greater than 1M Ω；(2) DC resistance between multilayer insulation component radiation shield and multilayer insulation component earthing or grounding means hollow copper rivet is less than 80Ω；(3) multilayer insulation component is connected to satellite structure and connect by multilayer insulation component earthing or grounding means, ground connection crestal line and zero type terminal Ground system (SGS), it should be ensured that multilayer insulation component earthing or grounding means to the DC resistance between satellite structure earthed system (SGS) Less than 1 Ω.
- 6. a kind of earthing method of GEO satellite external multi-layer insulating assembly earthed system according to claim 1, its feature It is that step is as follows：(1) the multilayer insulation component earthing or grounding means quantity on monolithic multilayer insulation component is set, completes multilayer insulation component ground connection Device is installed, and connecting single respectively by label with the ground wire being connected on ground connection crestal line from the ground wire that unidirectional weld tabs is drawn inserts Pin, single jack；(2) ground wire being connected with ground connection crestal line is connected on ground connection crestal line nearby by way of hook weldering, and ground connection crestal line passes through zero Type terminal is fixed on satellite surface earth point, carries out cementation to ground connection crestal line, single contact pin is inserted into single jack；(3) grounding resistance measuring method is utilized, grounding resistance measurement is carried out according to measurement request；(4) after test confirms that grounding resistance meets the requirements, it is enclosed on single contact pin with heat-shrinkable T bush, on single jack and blows contracting Shaping；(5) ground wire and ground connection crestal line are arranged, line is all put between multilayer insulation component and satellite capsule plate, in multilayer insulation The not exposed unnecessary line of module outer surface.
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