CN108271311A - A kind of MEMS electron sprays thruster electroneutral control method - Google Patents
A kind of MEMS electron sprays thruster electroneutral control method Download PDFInfo
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- CN108271311A CN108271311A CN201711420595.6A CN201711420595A CN108271311A CN 108271311 A CN108271311 A CN 108271311A CN 201711420595 A CN201711420595 A CN 201711420595A CN 108271311 A CN108271311 A CN 108271311A
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- thruster
- thrusters
- electroneutral
- control method
- particle
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H15/00—Methods or devices for acceleration of charged particles not otherwise provided for, e.g. wakefield accelerators
Abstract
The present invention provides a kind of MEMS electron sprays thruster electroneutral control method, and by thruster pairing work with different charge, permutation and combination carries out plume neutralization, to keep thruster entirety electroneutral, avoids charge accumulated.The control method of the present invention realizes that simply mode is flexible, and is not introduced into extras, does not increase the weight of satellite.The present invention is for same thruster by periodically converting electrode voltage polarity, make thruster alternating spray positive particles or negative particles, the particle or drop of such two pairing thrusters injection oppositely charged, ensure that the continuity and uniformity of two thruster entirety thrust.
Description
Technical field
The invention belongs to electron spray thruster application fields, are related to a kind of MEMS electron sprays thruster array electroneutral control
Method.
Background technology
MEMS electron spray thrusters are one of research hotspots that current micro-nano satellite promotes field.MEMS electron spray thrusters
During the work time, propellant (ionic liquid) sprays array outward under the multiple physical fields coupling such as electric field force, surface tension
Charged particle or drop are penetrated, so as to generate thrust.But with the accumulation of time, the positively charged particle or electronegative of single injection
Charge accumulated will occur for particle, thruster so that the whole electric or negative electricity of whole star braid, this pacifies thruster normal work even celestial body
It will adversely affect entirely.
For single MEMS electron sprays thruster array operation principle referring to Fig. 1, as shown in Figure 1, pushing away in emitter
It is reached near tip under capillary action into agent, in the extraction voltage (V that extracting pole is appliedext) under effect, in transmitting pole tip
Taylor cone is formed, and further ejects ion/charged drop of electrification；Ion/the charged drop for the electrification ejected is adding
Accelerating potential (the V that fast pole is appliedacc) under effect, further speed up, it is sprayed with higher jet velocity and generates thrust.Due to
The particle of ejection positively or negatively, can cause thruster to lose electroneutral, generate charge accumulated.
Existing electroneutral control method is to increase additional averager on thruster, and which not only adds thrusts to think highly of
Amount, also adds thruster complexity, reduces system reliability.
The present invention asks to solve the charge accumulated that MEMS electron spray thruster arrays occur in micro-nano satellite application
Topic, proposes a kind of electroneutral control method.
Invention content
In order to overcome the deficiencies of the prior art, the present invention provides a kind of MEMS electron sprays thruster electroneutral control method, solution
Electroneutral control problem in MEMS electron spray thruster array application processes of having determined, while solve MEMS electron spray thrusters
Thrust is continuous in array application process and the problem of uniformity.
The technical scheme is that：
A kind of MEMS electron sprays thruster electroneutral control method is provided, two thrusters are placed side by side to be worked at the same time,
In a positively charged particle of injection, another sprays electronegative particle.
Preferably, the polarity of two thruster periodic transformation's jet particles.
Preferably, the frequency for converting the polarity of jet particle is 1Hz~20Hz.
Another kind MEMS electron spray thruster electroneutral control methods are provided, four thrusters, first, fourth thruster are set
The particle polarity that the particle polarity of injection is sprayed with second and third thruster is on the contrary, the first thruster and the second thruster are lateral simultaneously
Row are placed, and the first thruster and third thruster are vertically placed side by side, and the second thruster and the 4th thruster are vertically placed side by side；
Two opposite polarity thrusters of jet particle work at the same time or four thrusters work at the same time.
Preferably, the polarity of four thruster periodic transformation's jet particles.
Preferably, the frequency for converting the polarity of jet particle is 1Hz~20Hz.
Offer another kind MEMS electron spray thruster electroneutral control methods, eight thrusters of setting, first and third, six, eight
The particle polarity sprayed with second, four, five, seven thrusters of particle polarity of thruster injection is on the contrary, the first thruster, second push away
Power device, third thruster are transversely arranged successively；First thruster, the 4th thruster, the 6th thruster vertical array successively；6th
Thruster, the 7th thruster, the 8th thruster are transversely arranged successively；Third thruster, the 5th thruster, the 8th thruster are successively
Vertical array；Two opposite polarity thrusters of jet particle work at the same time or eight thrusters work at the same time.
Preferably, the polarity of four thruster periodic transformation's jet particles.
Preferably, the frequency for converting the polarity of jet particle is 1Hz~20Hz.
Preferably, two groups of thrusters are opened as needed, and every group of thruster includes two adjacent thrusters, two groups of thrusts
It is mutually non-conterminous between device.
The present invention has the following advantages that compared with prior art：
(1) plume neutralization is carried out, by the way that more MEMS electron spray thrusters paired in tandem are worked to keep in the present invention
Thruster entirety electroneutral, avoids charge accumulated, and method is simple, and is not introduced into extras, does not increase the weight of satellite.
(2) thruster combination of the invention is versatile and flexible, can be gone here and there according to the thruster quantity of actual demand
Connection combination suitable for several scenes, has certain generalization and broad applicability.
(3) present invention makes thruster alternating spray for same thruster by periodically converting electrode voltage polarity
Positive particles or negative particles, the particle or drop of such two pairing thrusters injection oppositely charged, ensure that two push away
The continuity and uniformity of power device entirety thrust.
Description of the drawings
Fig. 1 is single MEMS electron sprays thruster operation principle schematic diagram；
Fig. 2 is MEMS electron sprays thruster electrfic centre control method schematic diagram of the present invention；
Fig. 3 combines electrfic centre control method schematic diagram for two MEMS electron sprays thrusters；
Fig. 4 combines electrfic centre control method schematic diagram for four MEMS electron sprays thrusters；
Fig. 5 combines electrfic centre control method schematic diagram for eight MEMS electron sprays thrusters.
Specific embodiment
Due to the ejection of charged particle/drop in the MEMS electron spray thruster array courses of work, if not using certain
Electroneutral control method, thruster will occur charge accumulated, can not work normally in itself so as to cause thruster in itself, even
Influence the normal work of other electrostatic sensitive load of celestial body.Traditional electric propulsion thruster electroneutral control method is using special
Cathode averager neutralizes to realize, but this method will influence the thrust and efficiency of entire propeller, and increase the weight of system
Amount and complexity.
In order to eliminate charge build-up problems and the thruster efficiency that the above-mentioned course of work generates, the present invention uses two
Thruster complementary duty.As shown in Fig. 2, thruster A sprays positively charged particle, thruster B uses opposite polarity extraction voltage
(Vext) and accelerating potential (Vacc) it is made to spray negatively charged particle.Positively charged particle and electronegative particle can be mutual in neutral zone
Collision makes plume that electroneutral integrally be presented after neutralizing.Since thruster A and thruster the B charged particle mass ejected may not
Together, therefore thruster A and B thrust can be caused uneven, in order to ensure the uniformity of thrust and continuity, needs periodically (to become
Change frequency and be generally 1Hz~20Hz) exchange thruster A and thruster B extraction voltage (Vext) and accelerating potential (Vacc) pole
Property, make the charged particle polarity that two thrusters eject exactly the opposite.
The mode of thruster work in combination can be various, can two intercombination neutralizations according to practical need of work
Charge, can also four intercombination neutralization charges, eight intercombination neutralization charges.
Embodiment 1
This implementation is mutually neutralized using two thrusters, and the first thruster sprays positively charged particle, and the second thruster uses pole
The opposite extraction voltage (V of propertyext) and accelerating potential (Vacc) it is made to spray negatively charged particle.Positive particles and negative particles can be in
Journey electroneutral after being neutralized with area.First thruster and the second thruster are placed side by side, the first thruster and the second thruster plus
Fast pole plate is connected and is total to ground, and the first thruster, which extracts pole plate and emitter and connects, to be extracted voltage source (voltage is extracted between two electrodes is
Vext), extract pole plate and accelerate pole plate connect acceleration voltage source (between two electrodes accelerating potential be Vacc)；Second thruster extracts pole plate
And emitter connects extraction voltage source and (voltage is extracted between two electrodes as-Vext), it extracts pole plate and pole plate is accelerated to connect acceleration voltage source
(accelerating potential is-V between two electrodesacc), connection mode is as shown in Figure 2.On the contrary, make the first thruster spray negatively charged particle, second
Thruster sprays positively charged particle, can also realize mutual neutralization.
Embodiment 2
This implementation is mutually neutralized using four thrusters, and four thrusters are set altogether, and first, fourth thruster spray band is just
Charged particle, second and third thruster is using opposite polarity extraction voltage (Vext) and accelerating potential (Vacc) it is made to spray negatively charged grain
Son, the polarity of periodic transformation's jet particle.Positive particles and negative particles can be in neutral zones and rear journey electroneutral.First pushes away
Power device and the second thruster are laterally placed side by side, accelerate the laterally corresponding adjacent connection respectively of pole plate, extraction pole plate and transmitting pole plate.
First thruster and third thruster are vertically placed side by side, are accelerated pole plate, extract pole plate and are emitted pole plate vertical corresponding phase respectively
Neighbour's connection.Second thruster and the 4th thruster are vertically placed side by side, are accelerated pole plate, extract pole plate and are emitted pole plate difference and is vertical
Corresponding adjacent connection.Third thruster and the 4th thruster are laterally placed side by side simultaneously, are accelerated pole plate, are extracted pole plate and emitter
Plate laterally corresponding adjacent connection respectively.First, fourth thruster extraction pole plate and emitter can be made to connect and extract voltage source (two electrodes
Between extract voltage be Vext), extract pole plate and accelerate pole plate connect acceleration voltage source (between two electrodes accelerating potential be Vacc)；Secondth,
Three thrusters extract pole plate and emitter connects extraction voltage source and (voltage extracted between two electrodes as-Vext), it extracts pole plate and accelerates pole
Plate connects acceleration voltage source, and (accelerating potential is-V between two electrodesacc).Since there are two take around each thruster for carrying positive charge
Negatively charged thruster, equally can be with there are two the thruster for carrying positive charge around each thruster for carrying negative electrical charge
Achieve the purpose that charging neutrality.In order to ensure the uniformity of thrust and continuity, the polarity of periodic transformation's jet particle, but protect
It is electrically identical to hold first, fourth thruster injection charged particle, it is electrically opposite with second and third thruster injection charged particle.
It can be selected according to actual conditions, such as four thrusters can be selected to work at the same time, can also only be opened
Two opposite polarity thrusters of adjacent jet particle, such as only open first and second thruster or only open first and third
Thruster can equally realize charging neutrality.
Embodiment 3
This implementation is mutually neutralized using eight thrusters, and eight thrusters are set altogether, first and third, six, eight thrusters
Positively charged particle is sprayed, second, four, five, seven thrusters are using opposite polarity extraction voltage (Vext) and accelerating potential (Vacc) make
It sprays negatively charged particle.Positive particles and negative particles can be in neutral zones and rear journey electroneutral.First thruster, the second thrust
Device, third thruster are transversely arranged successively, and pole plate, extraction pole plate and transmitting pole plate is accelerated laterally to correspond to adjacent connection successively.The
Vertical array, acceleration pole plate extract pole plate and emit pole plate and erect successively successively for one thruster, the 4th thruster, the 6th thruster
To the adjacent connection of correspondence.6th thruster, the 7th thruster, the 8th thruster are transversely arranged successively, accelerate pole plate, extract pole plate
Adjacent connection is laterally corresponded to successively with transmitting pole plate.Third thruster, the 5th thruster, the 8th thruster vertical array successively,
Pole plate, extraction pole plate and transmitting pole plate is accelerated vertically to correspond to adjacent connection successively.It is empty between second thruster and the 7th thruster
Put the position of a thruster.In order to ensure the uniformity of thrust and continuity, the polarity of periodic transformation's jet particle.But it protects
It is electrically identical to hold first and third, six, eight thrusters spray injection charged particle, it is electrical with second, four, five, seven thrusters injection charged particle
On the contrary.First and third, six, eight thrusters can be made to extract pole plate and emitter and connect to extract voltage source (extracting voltage between two electrodes is
Vext), extract pole plate and accelerate pole plate connect acceleration voltage source (between two electrodes accelerating potential be Vacc)；Secondth, four, five, seven thrusts
Device extracts pole plate and emitter connects extraction voltage source and (voltage extracted between two electrodes as-Vext), it extracts pole plate and acceleration pole plate connects and adds
(accelerating potential is-V to fast voltage source between two electrodesacc), vice versa realizes electrically neutralization.
It can be selected according to actual conditions, such as eight thrusters can be selected to work at the same time, can also only be opened
Two opposite polarity thrusters of adjacent jet particle, such as first and second thruster is only opened, only open first, fourth thrust
Device, charging neutrality can equally be realized by only opening the four, the six thrusters ....In addition it can open two groups of thrusts as needed
Device, every group of thruster include two opposite polarity thrusters of adjacent jet particle, mutual non-conterminous, example between two groups of thrusters
Such as open first, fourth thruster and the five, the eight thrusters；First, fourth thruster and third, five thrusters；First, fourth thruster
With the seven, the eight thrusters ...
By the way that more MEMS electron spray thrusters paired in tandem are worked in the present invention, plume neutralization is carried out, to keep pushing away
Power device entirety electroneutral, avoids charge accumulated.
The above, best specific embodiment only of the invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.
Unspecified part of the present invention belongs to common sense well known to those skilled in the art.
Claims (10)
1. a kind of MEMS electron sprays thruster electroneutral control method, which is characterized in that two thrusters place work simultaneously side by side
Make, the positively charged particle of one of injection, another sprays electronegative particle.
2. MEMS electron sprays thruster electroneutral control method as described in claim 1, which is characterized in that two thruster weeks
Phase property converts the polarity of jet particle.
3. MEMS electron sprays thruster electroneutral control method as claimed in claim 2, which is characterized in that transformation jet particle
Polarity frequency be 1Hz~20Hz.
4. a kind of MEMS electron sprays thruster electroneutral control method, which is characterized in that four thrusters of setting, first, fourth pushes away
The particle polarity that the particle polarity of power device injection is sprayed with second and third thruster is on the contrary, the first thruster and the second thruster are horizontal
It is placed to arranged side by side, the first thruster and third thruster are vertically placed side by side, and the second thruster and the 4th thruster are vertically arranged side by side
It places；Two opposite polarity thrusters of jet particle work at the same time or four thrusters work at the same time.
5. MEMS electron sprays thruster electroneutral control method as claimed in claim 4, which is characterized in that four thruster weeks
Phase property converts the polarity of jet particle.
6. MEMS electron sprays thruster electroneutral control method as claimed in claim 5, which is characterized in that transformation jet particle
Polarity frequency be 1Hz~20Hz.
7. a kind of MEMS electron sprays thruster electroneutral control method, which is characterized in that eight thrusters of setting, first and third,
6th, particle polarity and second, four, five, seven the thrusters injection of eight thrusters injection particle polarity on the contrary, the first thruster,
Second thruster, third thruster are transversely arranged successively；First thruster, the 4th thruster, the 6th thruster are vertically arranged successively
Row；6th thruster, the 7th thruster, the 8th thruster are transversely arranged successively；Third thruster, the 5th thruster, the 8th push away
Power device vertical array successively；Two opposite polarity thrusters of jet particle work at the same time or eight thrusters work at the same time.
8. MEMS electron sprays thruster electroneutral control method as claimed in claim 7, which is characterized in that four thruster weeks
Phase property converts the polarity of jet particle.
9. MEMS electron sprays thruster electroneutral control method as claimed in claim 8, which is characterized in that transformation jet particle
The frequency of polarity be 1Hz~20Hz.
10. MEMS electron sprays thruster electroneutral control method as claimed in claim 7, which is characterized in that open two groups and push away
Power device, every group of thruster include two adjacent thrusters, mutually non-conterminous between two groups of thrusters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711420595.6A CN108271311A (en) | 2017-12-25 | 2017-12-25 | A kind of MEMS electron sprays thruster electroneutral control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711420595.6A CN108271311A (en) | 2017-12-25 | 2017-12-25 | A kind of MEMS electron sprays thruster electroneutral control method |
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| CN201711420595.6A Pending CN108271311A (en) | 2017-12-25 | 2017-12-25 | A kind of MEMS electron sprays thruster electroneutral control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7827779B1 (en) * | 2007-09-10 | 2010-11-09 | Alameda Applied Sciences Corp. | Liquid metal ion thruster array |
| US20110005191A1 (en) * | 2008-03-05 | 2011-01-13 | Georgia Tech Research Corporation | Cold cathodes and ion thrusters and methods of making and using same |
| US9194379B1 (en) * | 2010-02-10 | 2015-11-24 | The United States Of America As Represented By The Secretary Of The Navy | Field-ionization based electrical space ion thruster using a permeable substrate |
| CN105649906A (en) * | 2015-12-25 | 2016-06-08 | 上海空间推进研究所 | Pinhole array miniature electrostatic electric thruster |
| CN107472556A (en) * | 2017-07-28 | 2017-12-15 | 北京控制工程研究所 | A kind of MEMS electron sprays thruster array structure and implementation method |
-
2017
- 2017-12-25 CN CN201711420595.6A patent/CN108271311A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7827779B1 (en) * | 2007-09-10 | 2010-11-09 | Alameda Applied Sciences Corp. | Liquid metal ion thruster array |
| US20110005191A1 (en) * | 2008-03-05 | 2011-01-13 | Georgia Tech Research Corporation | Cold cathodes and ion thrusters and methods of making and using same |
| US9194379B1 (en) * | 2010-02-10 | 2015-11-24 | The United States Of America As Represented By The Secretary Of The Navy | Field-ionization based electrical space ion thruster using a permeable substrate |
| CN105649906A (en) * | 2015-12-25 | 2016-06-08 | 上海空间推进研究所 | Pinhole array miniature electrostatic electric thruster |
| CN107472556A (en) * | 2017-07-28 | 2017-12-15 | 北京控制工程研究所 | A kind of MEMS electron sprays thruster array structure and implementation method |
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Application publication date: 20180710 |
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