CN107605686A - A kind of pulsed space junk powder laser detonation engine - Google Patents
A kind of pulsed space junk powder laser detonation engine Download PDFInfo
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- CN107605686A CN107605686A CN201710777307.6A CN201710777307A CN107605686A CN 107605686 A CN107605686 A CN 107605686A CN 201710777307 A CN201710777307 A CN 201710777307A CN 107605686 A CN107605686 A CN 107605686A
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Abstract
The invention discloses a kind of pulsed space junk powder laser detonation engine, belong to aerospace engineering field, including the open main chamber in a both ends, axially disposed the preliminary exposition device being sequentially communicated, planetary type ball-milling device, detonation chamber and jet pipe in main chamber, powder storing room, control system, reflection focus portion and laser generator are respectively arranged with main chamber side wall；The both ends of powder storing room connect with planetary type ball-milling device and detonation chamber respectively；Pulsed nanosecond laser caused by laser generator injects detonation chamber by reflecting focus portion, and the plasma air mass of batch (-type) pinking generation HTHP occurs with the fragment powder in detonation chamber, and the plasma air mass is discharged by jet pipe；Control system is connected with preliminary exposition device, planetary type ball-milling device and laser generator respectively, controls the various actions of whole engine.One aspect of the present invention removes space junk, on the other hand provides the momentum become needed for rail posture adjustment again for spacecraft.
Description
Technical field
It is more particularly to a kind of to be used to remove space junk the invention belongs to aerospace engineering field, and space junk is converted
For the pulsed space junk powder laser detonation engine of spacecraft propulsion working medium.
Background technology
Space junk is the product of mankind's solar-system operation, and its source includes：The rocket rocket body of completion task, satellite body,
Fragment etc., is spatial loop caused by the collision between discards, space object during rocket ejecta, execution space mission
The primary pollution source in border.Relative average speed 10km/s between space junk and spacecraft is calculated, and 1 gram of space junk is hit
Hit explosion equivalent of the kinetic energy equivalent to 24 grams of TNT explosives.Therefore, space junk is brought serious to the life-span of spacecraft and safety
Threaten.
At present, ground monitoring system can monitor space junk more than 10cm magnitudes, and its quantity has exceeded 30000
Individual, spacecraft can avoid hitting by active dodge mode.Space junk below 1cm magnitudes is estimated to be 20,000,000,000, although
It is large number of, but possessed kinetic energy is smaller, spacecraft can resist shock by way of structural shielding.In 1-10cm
Space debris population between magnitude is estimated to be 67000, and ground monitoring system can not monitor their track, and its at present
Kinetic energy is larger, and the threat to spacecraft is also maximum.
The main component of space junk is the metal such as aluminium alloy and aluminium, zinc, titanium and its oxide, is partly produced for spacefarer
Containing sodium, potassium composition waste and electronic product caused by the composition such as cupric, silver fragment.Can be simply broken by these spaces
Piece is divided into three classes by density：High density fragment, Midst density fragment and low-density fragment.Rational estimation at present：90% space
Fragment belongs to Midst density category, and the space junk that there are about 10% belongs to high density category, and low-density fragment is relatively fewer, and compares
Easily acted on by atmosphere and drop rail.High density material mainly includes Fe (7.9g/cc), Ag (10.5g/cc), Cu (8.8g/
cc).Intermediate density material mainly includes Al (2.8g/cc), Ti (4.5g/cc) and some functional paints (2.5g/cc), wherein aluminium
Alloy account for very big proportion.It can be said that aluminium and titanium alloy account for more than the 70% of all space junk constituents.
Most of space junk will not Lock-out.Research shows that only the space below 500km orbit altitudes is broken
Piece, acted on by atmosphere, be only possible to nature reentry and fall from the sky or outer space ruin, this process also need spend the several years to many decades when
Between.More than 500km space junk is influenceed very little by atmosphere, as a consequence it is hardly possible to drops rail naturally.The space flight machine such as NASA
Structure intends the common institution of regulations, it is specified that certain subsequent treatment need to be done to the spacecraft of transmitting in future, makes it after completion task
Orbital lifetime must not exceed 25 years.Such measure is also only to slow down the process of fragment growth.Due to the phase between space junk
Mutually collision, itself is peeled off, and number of tiles can still continue to increase.Calculated according to simulation, in ensuing ten or twenty year, space flight
The probability that device bumps against with space junk will sharply increase, and be likely to cause catastrophic chain reaction.
Technology for actively removing space junk, focuses primarily upon following two modes at present, i.e. small size space is broken
The removing of piece and the capture of large scale space junk.Technically feasible and economic and practical method for cleaning is the weight studied at present
Point.
The method that laser removes space junk can be divided into ground laser drop rail method and sky-based laser drop rail method.Its principle
All be by superlaser, be radiated space junk surface so that space junk surface vaporization and with spherical vapor form to
After spray, there is provided drop rail needed for momentum.Through accumulation after a while, space junk main body obtains corresponding speed increment,
So as to realize that rail drops in the deceleration of space junk, such as Orion (ORION) plan in the U.S. and the space cleaning of European Space Agency
(CLEANSPACE) plan etc..Due to remote sensing and the technology restriction of orbit determination, ground laser drop rail method is only applicable to large-sized
Space junk.Sky-based laser device becomes required energy consumption during rail and posture adjustment, and expensive manufacture and launching costs are also needs
The problem of consideration.
Satellite and rocket rocket body for failure, robot for space can be used to be intersected with it, implementation is arrested and returns to air
Layer.The methods of mechanical arm is arrested, netting is arrested, ion engine adheres to, and solar sail guides can be divided into again among these.However, hair
It is a kind of and its expensive means to penetrate robot for space.Either arrested using mechanical arm or netting is arrested, cleaning robot is all
Enough fuel need to be carried and become rail to meet that space becomes rail, particularly antarafacial, and arrest the racemization of spacecraft after fragment and reenter
The needs of atmosphere；And use ion engine attachment or solar sail to guide, corresponding posture control system need to be carried to ensure space
The accurate atmospheric reentry of fragment.
The propellant that the ion engine used in aerospace engineering carries at present is mainly the inert gases such as helium, argon gas, such as
The specific impulse mangneto ion slurry engine VASIMR in the U.S., is to add ionized inert gas into plasma, and with magnetic mirror
With constraint, reuse high electric field and accelerated, thrust is produced after jet pipe sprays.However, because the composition of space junk is deposited
Enter electric field acceleration after certain complexity and diversity, space junk ionization, acceleration is not quite similar, therefore unfavorable
In the control of such thrust size.
There is a kind of method in imagination to be in addition, after spacecraft is sent into planned orbit by final vehicle, by certain
Change rail, capture one or several space junk nature reentries.On the one hand existing space junk, the opposing party are removed
Face, final vehicle also no longer turn into new space junk.Certainly, the fuel of final-stage rocket should also meet the needs for becoming rail.The mankind
The number of transmitting spacecraft is a small number of after all compared with the quantity of current space junk, therefore actual cleaning effect should be not very bright
It is aobvious.
The cleaning of space junk is attributed to a key problem：How cleaning spacecraft obtains having for row in the course of the work
The large scale of effect becomes rail, tracking, intersects required thrust.Orbit maneuver particularly antarafacial becomes rail, brings a large amount of fuel consumptions,
The in-orbit life-span of spacecraft is significantly reduced, defragmentation cost effectiveness is too high, hinders the development of defragmentation work.
The content of the invention
The invention aims to solve the problems, such as that momentum obtains spacecraft in space, proposes a kind of pulsed space
Fragment powder laser detonation engine, the engine in space turn waste into wealth the space junk of capture, with fragment powder generation
Engine propellant is used as inert gas (argon gas or xenon).
The present invention adopts the following technical scheme that：
A kind of pulsed space junk powder laser detonation engine, it is characterised in that the engine is used to clear up space
Fragment and propellant of the space junk powder as spacecraft caused by；The engine includes the open main chamber in a both ends,
Axially disposed the preliminary exposition device being sequentially communicated, planetary type ball-milling device, detonation chamber and jet pipe in main chamber, in main chamber side wall point
Powder storing room, control system, reflection focus portion and laser generator are not provided with；Wherein, the both ends difference of powder storing room
Connected with planetary type ball-milling device and detonation chamber；Laser generator produces pulsed nanosecond laser, and the laser is by reflecting focus portion
After inject detonation chamber, and the plasma air mass that batch (-type) pinking produces HTHP occurs with the fragment powder in detonation chamber,
The plasma air mass is discharged by jet pipe and produces thrust；Control system respectively with preliminary exposition device, planetary type ball-milling device and
Laser generator is connected, and controls the various actions of whole engine.
The planetary type ball-milling device is by multiple abrasive hardcoat ball, grinding pot and planetary gears, and 1 sun gear and driving should
The motor of sun gear rotation is formed；Wherein, multiple planetary gears are arranged on sun gear in a manner of circumference uniform distribution, and pass through sun gear
Drive and rotated simultaneously around respective axis and sun gear axis, and the direction of rotation of sun gear and planetary gear is opposite；Each planetary gear point
It is not fixedly connected with 1 grinding pot, multiple abrasive hardcoat balls are dispersed in each grinding pot.
The features of the present invention and beneficial effect：
The present invention uses space junk powder to replace propellant of the inert gas as spacecraft, planetary type ball-milling therein
Space junk can be ground to micron dimension by device, and the powder part being ground into is transported to powder in a manner of screw propulsion
Locker room, to ensure the sustainable use of powder；Another part is delivered to detonation chamber with same propulsion mode.Powder is being transported
During defeated, using the screw propulsion of mechanical type, it can reduce using compressed gas cylinder needed for the fluid driven mode such as air-flow etc.
The weight of additional load.In addition, be focused irradiation to detonation chamber using pulse type laser generator, generate mix wait from
The high temperature and high pressure gas of daughter, and space environment is injected into by jet pipe, the final thrust produced needed for spacecraft.Injection
The plasma gone out flies away from earth surrounding track quickly in the presence of solar wind, and no longer in-orbit spacecraft is impacted.
The maximum advantage of the pulsed space junk powder laser detonation engine of the present invention is on the one hand to clean up sky
Between environment, on the other hand gather materials on the spot, space junk be changed into the propellant of spacecraft operation, extend cleaning spacecraft
Working life.On the one hand the present invention can meet actual feelings weightless in space using planetary type ball-milling device processing space junk
Condition, be on the other hand also applied for various materials space junk it is broken.The present invention uses superlaser ionization spaces fragment
Powder, it can effectively handle the powder of different materials.And the propellant of spacecraft space flight is translated into, and energy converts
Efficiency high.
Brief description of the drawings
A part of accompanying drawing for forming the present invention is used for providing a further understanding of the present invention, schematic implementation of the invention
Example and its illustrate be used for explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the overall structure figure according to the embodiment of the present invention；
Fig. 2 is the section at Figure 1A-A places, is six pot type planets of planetary type ball-milling device according to the embodiment of the present invention
Take turns distribution map；
Description of reference numerals：
1- space junks；2- preliminary exposition devices；3- mill balls；4- grinding pots；5- sun gears；6- planetary gears；7- is planetary
Ball milling device；8- control systems；9- powder storage chambers；10- reflects focus portion；11- detonation chambers；12- laser generators；13- tails spray
Pipe.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.It should be noted that do not rushing
In the case of prominent, the feature in embodiment and embodiment in the present invention can be mutually combined.
Describe the present invention in detail below with reference to the accompanying drawings.
A kind of pulsed space junk powder laser detonation engine proposed by the present invention, embodiment overall structure is as schemed
Shown in 1, the engine is the power part of spacecraft, is installed on the axis of spacecraft.This engine is by being distributed in space flight
The solar cell of device both wings is powered, for clearing up space junk and space junk powder is used as spacecraft caused by
Propellant, the engine includes the open main chamber in a both ends, the axially disposed preliminary exposition device 2 being sequentially communicated in main chamber,
Planetary type ball-milling device 7, detonation chamber 11 and jet pipe 13, are provided with powder storing room 9 in the side wall of main chamber one, in another side wall of main chamber
It is provided with control system 8, reflection focus portion 10 and laser generator 12；Wherein, the both ends of powder storing room 9 respectively with it is planetary
Ball milling device 7 connects with detonation chamber 11；Laser generator 12 produces pulsed nanosecond laser, and the laser is by reflecting focus portion 10
The laser generated after reflection focussing force injects detonation chamber 11 and batch (-type) pinking production occurs with the space junk powder in detonation chamber
The plasma air mass of raw HTHP, the plasma air mass are discharged by jet pipe 13；Control system 8 is divided with preliminary respectively
Solution device 2, planetary type ball-milling device 7 and laser generator 12 electrically connect, and control the various actions of whole engine.
The specific implementation and function declaration of each building block of inventive engine are as follows：
Preliminary exposition device 2 can be by the way of jaw crushing or rotopeening formula crush, and concrete model can be found in moral
Guo Laichi companies jaw crusher BB 100 or rotopeening formula crusher SR 300.Planetary space fragment 1 is after captured
Preliminary exposition device 2 is initially entered, preliminary fractionation and simple compression are carried out by physics mode, space junk 1 is ground into li
The space fragment of meter level.
Preliminary exposition device 2 exports normal on preliminary exposition device inwall by being fixed between the entrance of planetary type ball-milling device 7
The fixture of rule carries out material (the space fragment generated by preliminary exposition device) transmission, and the fixture is connected with control system, controlled
System 8 processed controls.
Planetary type ball-milling device 7 is a kind of effective grinding machinery, and space junk is ground in planetary type ball-milling device
Space junk powder is produced, as shown in Figure 2 (i.e. A-A sections in Fig. 1), the planetary type ball-milling device 7 is by multiple hard for its cross section
Mill ball 3, grinding pot 4 and planetary gear 6, a sun gear 5 and the motor composition for driving the sun gear 5 rotation；Sun gear 5 passes through
Connecting shaft and motor connection, multiple planetary gears 6 (the present embodiment has 6 planetary gears 6) are connected by connecting shaft with sun gear, and
It is arranged in a manner of circumference uniform distribution on sun gear 5, sun gear 5 is rotated by motor driven, and the rotation of sun gear 5 drives all rows
Star-wheel 6 rotates around respective axis, but the direction of rotation of planetary gear 6 is opposite with the direction of rotation of sun gear 5 (such as arrow institute in Fig. 2
Show)；In addition to rotation, the axle also around sun gear 5 revolves round the sun planetary gear 6；Each planetary gear 6 is fixedly connected with 1 grinding pot 4, and this grinds
Grinding jar drives rotation by planetary gear 6, and multiple abrasive hardcoat balls are dispersed in each grinding pot, and mill ball 3 is planetary as this
The abrasive media of ball milling device, this area is typically passed through by any one in chromium steel, stainless steel, zirconium oxide or hard ceramic material
Conventional processing technology is made, and each ball grinder is a hollow roller, inner wall of rotary drum typically by nonabradable manganese steel or
Ceramic material is made up of the conventional processing technology in this area.This planetary type ball-milling device 7 is in space under conditions of weightlessness, mainly
By mutually colliding and rubbing caused by high speed rotation, particularly from the mutual shock between mill ball, to through preliminary point
Solve the Centimeter Level fragment that the crushing of device 2 is formed and the impulsive force needed for grinding is provided.The direction of rotation of sun gear 5 and planetary gear 6 on the contrary,
Both rotary speed ratio can be set according to being actually needed, the present embodiment 1:- 2, under such layout, coriolis force
Action effect it is very notable, the speed difference between mill ball and grinding pot to generate comminuting space fragment institute between mill ball
The frictional force and impact needed, shock effect is notable, grinding efficiency is higher.The regulation of the controlled system 8 of planetary type ball-milling device 7 is entered
Row batch (-type) is ground, it is ensured that body is unlikely to overheat, wherein grinding can select with intermittent time ratio according to being actually needed
4：1、3：2 or 1：1 etc..Such as 1：1 grinding intermittent ratio, grinding are chosen as 5min with off time：5min.Sent out by ground experiment
Existing, under the grinding of planetary type ball-milling device 7, the material for simulating the space junks such as aluminium alloy, titanium alloy can be milled to
Micron powder, and it is less than 10um into inclined normal distribution, the peak-peak of powder size.Planetary type ball-milling device installation is simple,
Energy consumption is relatively low, abrasive media Applied economy, is suitable for continuing grinding work or interval grinding work.Both it had been adapted to opened loop control grinding
Operation, closed-loop control grinding operation also is adapted for, and the material grinding almost to various hardness is all effective.Opened loop control grinding operation
The relevant parameter of grinding is adjusted (as controlled the motor being connected with sun gear 5 according to 8 program set in advance of control system
Switch, rotating speed and direction), it is not related to the detection to powder size in planetary type ball-milling device；Closed-loop control grinding operation will be examined
The powder size in planetary type ball-milling device is measured as feedback signal transmission to control system 8, control system is according to the feedback letter
The relevant parameter of number grinding operation of adjustment planetary type ball-milling device 7.
Most of space junk powder (about 80%) is with spiral transmission mode (sender caused by planetary type ball-milling device 7
Formula is this area routine techniques, can meet the quantitative transport of powder under reduced gravity situations in space) it is transported to powder storage chamber 9 and deposits
Storage.Powder storage chamber 9 can provide space junk powder to detonation chamber 11.The shape of this powder storage chamber 9 is that two is hemisphere, centre
Section is the strip cavity of cylinder, can be according to the size for being actually needed adjustment cavity.The volume of the present embodiment powder storage chamber 9 is big
It is small for 6L with meet spacecraft become rail during fuel sustainable supply.Remaining space fragment caused by planetary type ball-milling device 7
Powder is also directly transported to detonation chamber 11 with spiral transmission mode.Space junk powder in the present embodiment spiral transmission by
There is screw conveyor shaft realization, this has the controlled system 8 of screw conveyor shaft to control, and has turning for screw conveyor shaft by control
Speed and working time, it is possible to achieve the control to space junk powder transfer amount.
Reflection focus portion 10 by fixed with main chamber outer wall and common optical axis set one piece of speculum and one piece of focus lamp structure
Into.Laser caused by laser generator 12 first passes through the reflex of speculum, then is focused on by focus lamp and be incident to detonation chamber
In 11.The operation wavelength that focus portion is reflected in the present embodiment is 532nm, and wherein the effective focal length of focus lamp is 30.5mm.
Detonation chamber 11, space junk powder enter detonation chamber 11 by the entrance of detonation chamber 11.Detonation chamber 11 injects laser
Cavity wall at open up an optical window, optical window is made up of magnesium fluoride lens, laser by optical window inject detonation chamber 11.
Laser generator 12 controls laser generator 12 from the SGR lasers of Lei Bao companies production by control system 8
Switch, batch (-type) launch pulsed nanosecond laser of the energy in 4-6J, and the laser is quick-fried by reflecting the focusing illumination of focus portion 10
Indoor space junk powder is shaken, produces batch (-type) pinking.Because energy height is concentrated, space junk powder is converted into high temperature height
The plasma of pressure, its instantaneous temperature and pressure are up to 6000K-15000K, 20kbar-60kbar.
Jet pipe 13 is typically made by ceramic matric composite (CMC) and high temperature alloy.Jet pipe 13 be in by middle part forward
The funnel-form of both ends expansion afterwards, wherein, jet pipe first half is from large to small to middle shrinkage to a narrow larynx, after narrow larynx again
Change from small to big and expand outwardly to end.Jet pipe is used to the plasma air mass of HTHP caused by detonation chamber being injected into
In space, so as to produce thrust, the thrust obtains the power become needed for rail posture adjustment as spacecraft.The plasma ejected
In the presence of solar wind, earth surrounding track is flown away from quickly, and no longer in-orbit spacecraft is impacted.
Control system 8 is responsible for the control of whole engine various actions, and the control system is opened with preliminary exposition device 2 respectively
The switch of pass, the motor in planetary type ball-milling device 7 and laser generator 12 is connected；By control system control preliminary exposition device 2
Broken work, sun rotation, the form of the service intermittent of planetary type ball-milling device 7 and laser occur in planetary type ball-milling device 7
The switch of device 12；The installation site of the control system can optimize according to actual conditions.The control system of the present embodiment is
One conventional host computer, the various functions that control system is completed can be realized by the programming of routine and digital integrated electronic circuit.
The power supply of pulsed space junk powder laser detonation engine is provided by solar cell.The present embodiment engine
Overall preliminary power consumption is within 10kw, and wherein planetary type ball-milling device 7 needs 2.9kw, and laser generator 12 needs 5kw, control system
And miscellaneous part is within 2.1kw.Average intensity of solar radiation is 1369W/ square metres on Earth's orbit, according to 20% solar energy
Cell power conversion efficiency calculation, it is 36.5 square metres that can obtain required minimum windsurfing area.
The thrust of pulsed space junk powder laser detonation engine depend primarily on the grade in the exit of jet pipe 13 from
The size of sub- jet quality flow, and jet is relative to the speed in the exit of jet pipe 13.In the certain situation of input power
Under, specific impulse is inversely proportional with thrust.The present invention can adjust specific impulse by way of distributing solar cell power：In solar-electricity
In the case of the power stability output of pond, the solar cell power can be divided into two parts, be partly into planetary type ball-milling device
7, another part enters laser generator 12；If necessary to obtain big thrust, most of solar cell power is conveyed to row
Planetary ball milling device 7, produces more powder, and accelerates efficiency relatively low, brings more low speed plasmas, so as to engine/motor specific impulse
It is smaller, and thrust is larger；If necessary to obtain high specific impulse value, most of solar cell power is sent to laser generator 12, production
The negligible amounts still larger plasma of speed is given birth to, now motor power is smaller, but specific impulse is higher.Pushed away in low specific impulse/height
This engine can provide larger acceleration under force mode, and spacecraft can be made to obtain larger speed in the short period of time and increased
Amount；And under high specific impulse/low-thrust pattern, the consumption of powder can be reduced.For given aerial mission, by specific impulse and push away
The design of power, it is possible to achieve the optimization of spacecraft flight track.
Claims (9)
1. a kind of pulsed space junk powder laser detonation engine, it is characterised in that the engine is broken for clearing up space
Piece and propellant of the space junk powder as spacecraft caused by；The engine includes the open main chamber in a both ends, main
Intracavitary axially disposed the preliminary exposition device being sequentially communicated, planetary type ball-milling device, detonation chamber and jet pipe, in main chamber side wall respectively
It is provided with powder storing room, control system, reflection focus portion and laser generator；Wherein, the both ends of powder storing room respectively with
Planetary type ball-milling device connects with detonation chamber；Laser generator produces pulsed nanosecond laser, after the laser is by reflecting focus portion
Detonation chamber is injected, and the plasma air mass of batch (-type) pinking generation HTHP occurs with the fragment powder in detonation chamber, should
Plasma air mass is discharged by jet pipe and produces thrust；Control system respectively with preliminary exposition device, planetary type ball-milling device and swash
Optical generator is connected, and controls the various actions of whole engine.
2. engine according to claim 1, its feature is being, the planetary type ball-milling device is by multiple abrasive hardcoats
Ball, grinding pot and planetary gear, and 1 sun gear and the motor composition for driving sun gear rotation；Wherein, multiple planetary gears with
Circumference uniform distribution mode is arranged on sun gear, and is driven by sun gear and rotated simultaneously around respective axis and sun gear axis, and
The direction of rotation of sun gear and planetary gear is opposite；Each planetary gear is fixedly connected with 1 grinding pot respectively, and multiple abrasive hardcoat balls are equal
It is even to be dispersed in each grinding pot.
3. engine according to claim 2, its feature is being, the abrasive hardcoat ball is by chromium steel, stainless steel, oxidation
Any one in zirconium or hard ceramic material is made.
4. engine according to claim 2, its feature is being, each grinding pot is a hollow roller,
Inner wall of rotary drum is made up of manganese steel or ceramic material.
5. engine according to claim 2, its feature is being, the controlled system of motor of the planetary type ball-milling device
Control carries out service intermittent.
6. engine according to claim 2, its feature is being, grinding pot uses six tanks in the planetary type ball-milling device
Formula Central Symmetry is distributed；The rotary speed of sun gear and planetary gear ratio is 1：-2.
7. engine according to claim 1, its feature is being, between the preliminary exposition device and planetary type ball-milling device
Material transportation is carried out by the fixture being fixed on preliminary exposition device inwall.
8. engine according to claim 1, its feature is being, space powder caused by the planetary type ball-milling device is big
Part is stored in powder storage chamber with spiral transmission mode, and remainder is transported to detonation chamber with spiral transmission mode.
9. engine according to claim 1, its feature is being, detonation chamber is injected at the cavity wall of laser and opens up a light
Window.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9021782B1 (en) * | 2010-08-24 | 2015-05-05 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Aerospace laser ignition/ablation variable high precision thruster |
| CN105822515A (en) * | 2016-04-14 | 2016-08-03 | 哈尔滨工业大学 | Space debris plasma thruster |
| CN106545478A (en) * | 2016-11-02 | 2017-03-29 | 中国运载火箭技术研究院 | A kind of space junk energy conversion device and method based on laser threat warner |
-
2017
- 2017-08-31 CN CN201710777307.6A patent/CN107605686B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9021782B1 (en) * | 2010-08-24 | 2015-05-05 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Aerospace laser ignition/ablation variable high precision thruster |
| CN105822515A (en) * | 2016-04-14 | 2016-08-03 | 哈尔滨工业大学 | Space debris plasma thruster |
| CN106545478A (en) * | 2016-11-02 | 2017-03-29 | 中国运载火箭技术研究院 | A kind of space junk energy conversion device and method based on laser threat warner |
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