CN106793441B - A kind of resolving power is the semielliptical type radio frequency-ion microthruster of micro-ox level - Google Patents
A kind of resolving power is the semielliptical type radio frequency-ion microthruster of micro-ox level Download PDFInfo
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- CN106793441B CN106793441B CN201611160348.2A CN201611160348A CN106793441B CN 106793441 B CN106793441 B CN 106793441B CN 201611160348 A CN201611160348 A CN 201611160348A CN 106793441 B CN106793441 B CN 106793441B
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- ion
- radio
- frequency
- ionisation chamber
- microthruster
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Classifications
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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
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
- F03H1/0081—Electromagnetic plasma thrusters
-
- 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
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
- H05H1/4645—Radiofrequency discharges
Abstract
The present invention provides the semielliptical type radio frequency-ion microthrusters that a kind of resolving power is micro-ox level, comprising: ionisation chamber, radio-frequency antenna, gas handling system, shielding case, ion-optic system, welding connector；The ionisation chamber is semielliptical shape, and ionization chamber inlet connects gas handling system, and outlet connects the ion-optic system；The shielding case is located at outside ionisation chamber；The logical upper radio-frequency current of radio-frequency antenna, for generating eddy current field in the ionisation chamber, the welding connector is fixed on the shielding case.The present invention has following technical effect: 1, ionisation chamber is designed to semielliptical shape, and ion is effectively reduced and generates energy；2, radio-frequency antenna is wound on the outside of semielliptical shape ionisation chamber, realizes impedance matching using LC resonance and frequency modulation technology；3, gas ionization efficiency and plasma uniformity can be effectively improved compared to postposition gas distributor by designing preposition gas distributor.
Description
Technical field
The present invention relates to a kind of electric propulsion systems of Aerospace Satellite, and in particular to a kind of resolving power is the semielliptical of micro-ox level
Type radio frequency-ion microthruster.
Background technique
With the starting of China's Space gravitational wave detection plan, it is badly in need of developing miniature electric propulsion system to execute satellite etc.
Space craft high-precision attitude control, Orbit Transformation and without towing control etc. tasks.Because of the principle letter of radio frequency-ion thruster
List, thrust range is wide, modulation capability is strong, without built-in cathode and easy the features such as minimizing, and is chosen as primary study object.
Radio frequency-ion micromass culture system generally comprises seven parts, i.e., microthruster, averager, power supply processing unit, penetrate
Frequency generator, flow controller, pressure reducing valve and Xe basin, and microthruster is the core of micromass culture system, working principle is such as
Shown in Fig. 1.Working medium Xe gas enters ionisation chamber 03 by gas distributor 01.When the logical upper radio-frequency current of radio-frequency antenna 02, in electricity
From axial magnetic field is generated inside room 03, eddy current field E is then generated.The effect of this electromagnetism field alignment atom and ion can
To ignore, and neutral atom is hit after electrons gain enough energy, make its ionization, form radio frequency self-maintained discharge, be not necessarily to volume
Outer electron source.Ion in ionisation chamber 03 is accelerated to spray by ion-optic system 04, forms plume and generates thrust.It only needs to adjust
Section radio-frequency power size can be realized thrust and quickly adjust and high-precision control.In addition, 05 flow of emitted electrons of averager, neutralization push away
The ion stream of power device makes whole system maintain electroneutral.
Radio frequency-ion micromass culture technology is that the following micro-, moonlet realizes one of high-precision attitude and the hope of orbits controlling,
How the efficiency of electric propulsion system and the research theme of service life all the time Dou Shi world electric propulsion industry are improved.Traditional radio frequency
Ion thruster ionisation chamber is mostly cylinder, in recent years it has been proposed that being changed to semicircle or taper, it is expected to improve thrust
The discharging efficiency of device, achieves certain effect, but the efficiency of microthruster or relatively low.At home, there is no related single before
The research work of radio frequency-ion micromass culture technology was carried out in position, in order to meet the spaces such as the detection of spatial attraction wave and gravity field measurement
The micromass culture demand of tasks of science needs a kind of high-precision, low noise, long-life and efficient radio frequency-ion microthruster.
Summary of the invention
The purpose of the present invention is to provide a kind of high-precision, low noise, long-life and efficient radio frequency-ion microthrusts
Device.
To solve the above-mentioned problems, the present invention provides the semielliptical type radio frequency-ion microthrust that a kind of resolving power is micro-ox level
Device, comprising: ionisation chamber, radio-frequency antenna, gas handling system, shielding case, ion-optic system, welding connector；The ionisation chamber is half
Elliposoidal.
Further, the radio-frequency antenna is wound on the outside of semielliptical shape ionisation chamber, is realized using LC resonance and frequency modulation technology
Impedance matching.
Further, the gas handling system include sequentially connected Xe gas storage tank, pressure reducing valve, flow controller, air inlet steel pipe,
Hose, gas distributor；The gas distributor is preposition annular gas distributor.
Further, the shielding case is Al-alloy casing, for the electromagnetic wave that shielded radio frequency antenna launches outward, Yi Miangan
Other electronic systems of satellite are disturbed, while playing the role of fixed, support other component, the welding connector is positive and negative to fixation
High-tension cable and radio-frequency cable.
Further, the ion-optic system is by screen from the inside to the outside, dish-shaped accelerating grid, three grid group of dish-shaped decelerating screen
At wherein the material of screen is molybdenum, meets positive high voltage (900V~1800V)；It is polymer graphite that dish, which accelerates grid material, connects negative height
It presses (- 100V~-300V)；Dish-shaped deceleration grid material is invar and is grounded.
Further, the material of the ionisation chamber is aluminium oxide ceramics, and outer surface has spiral groove, the radio-frequency antenna
Around in the groove.
Compared with the existing technology, the present invention has following technical effect:
1, ionisation chamber is designed to semielliptical shape, and ion is effectively reduced and generates energy；
2, radio-frequency antenna is wound on the outside of semielliptical shape ionisation chamber, realizes impedance matching using LC resonance and frequency modulation technology；
3, gas ionization efficiency can be effectively improved and wait compared to postposition gas distributor by designing preposition gas distributor
The gas ions uniformity.
A kind of resolving power provided by the invention is that the semielliptical type radio frequency-ion microthruster of micro-ox level is functional, when pushing away
For strength journey in hundred micro-ox levels, thrust resolving power is up to micro-ox level.
Detailed description of the invention
Fig. 1 is the radio frequency-ion microthruster structural schematic diagram of the prior art.
Fig. 2 is the structural schematic diagram of radio frequency-ion of embodiment of the present invention microthruster.
Fig. 3 is the working condition photo of radio frequency-ion of embodiment of the present invention microthruster.
Fig. 4 is the ion beam current of radio frequency-ion of embodiment of the present invention microthruster and the relational graph of power.
Fig. 5 is the relational graph of the specific impulse of radio frequency-ion of embodiment of the present invention microthruster, thrust and power.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can mutual any combination.
Embodiment one:
As shown in Fig. 2, the present invention provides the semielliptical type radio frequency-ion microthruster that a kind of resolving power is micro-ox level, packet
It includes: ionisation chamber 09, radio-frequency antenna 10, gas handling system, shielding case 12, ion-optic system 11, welding connector 13,14；Ionisation chamber
09 is semielliptical shape.
Radio-frequency antenna 10 is wound on 09 outside of semielliptical shape ionisation chamber, realizes impedance using LC resonance and frequency modulation technology
Match.
Gas handling system includes sequentially connected Xe gas storage tank (not shown), pressure reducing valve (not shown), flow control
Device (not shown) processed, air inlet steel pipe 06, hose 07, gas distributor 08；Gas distributor is the distribution of preposition annular gas
Device.
The material of ionisation chamber 09 is aluminium oxide ceramics, and outer surface has spiral groove, and radio-frequency antenna 10 is wound in groove.
Ionisation chamber 09 is designed to semielliptical shape, and insulating materials aluminium oxide ceramics is selected to be made, compared to traditional cylinder
Shape ionisation chamber, can save the radio-frequency power of 10%-15%, to effectively improve the electrical efficiency of thruster.
Radio-frequency antenna 10 is wound in semielliptical shape ionisation chamber outer surface groove using the silver-plated copper tube that outer diameter is 2mm, and two
End is each passed through cable fixing part, and radio-frequency signal generator is connected to after shunt capacitor, and (this is a part of micromass culture system, no
Belong to microthruster content).Due to requiring in the space science project such as the detection of spatial attraction wave and gravity field measurement without machinery
Moving component, therefore radio frequency adaptation can not use variable capacitance, so the matching of radio-frequency antenna 10 uses LC resonance herein
And frequency modulation technology, this is to develop one of different places from Terrestrial Radio ion source (L is usually used in Terrestrial Radio ion source
Type, T-type or the adjustable matching network of π type).
Shielding case 12 is Al-alloy casing, for the electromagnetic wave that shielded radio frequency antenna 10 launches outward, in order to avoid interfere satellite
Other electronic systems, while playing the role of fixed, support other component.
As shown in Fig. 2, ion-optic system 11 by being respectively plane screen, dish-shaped accelerating grid, dish deceleration from the inside to the outside
Three grid of grid composition, wherein the material of screen is molybdenum, meets positive high voltage 900V~1800V；It is macromolecule stone that dish, which accelerates grid material,
Ink meets negative high voltage -100V~-300V；Dish-shaped deceleration grid material is invar and is grounded.
Grid main function of system is to extract to ionize indoor Xe ion and accelerated to spray, and generates deboost.Three
Grid system is compared with two grid systems, and the service life is longer, and focusing performance is more preferable.
Welding connector 13,14 is to the positive and negative high-tension cable of fixation and radio-frequency cable.
Working medium Xe gas flows through pressure reducing valve, flow controller and air inlet steel pipe 06 from storage tank, and three roads is then divided to flow through hose 07
With after preposition annular gas distributor 08 enter ionisation chamber.Compared to postposition gas distributor (shown in Fig. 1), such preposition annular
The residence time that the advantages of gas distributor 08 is that gas is evenly distributed, single Xe atom is in ionisation chamber 09 is longer, thus
Improve the uniformity and working medium utilization rate of plasma.
Experimental result
Resolving power of the invention be micro-ox level semielliptical type radio frequency-ion microthruster working condition as shown in figure 3,
As can be seen from the figure its ion focusing is functional, the distribution of plume almost symmetry.In addition, passing through optimization rf frequency
(4.5MHz) improves radio-frequency power coupling efficiency, and in 500 μ N of maximum thrust, specific impulse is about 2200s, and gross efficiency is close
20%.In the case where fixed throughput and grid voltage are only by adusting radio-frequency power, the ion of 1.5mA-8mA can get
Line, as shown in Figure 4.Within 7mA, thruster power and ion beam current are linear.When ion beam current is more than 7mA,
Gate current is accelerated to sharply increase, this can seriously affect the service life of ion-optic system.Fig. 5 is according to line and acceleration voltage
Estimation show that ground thrust and specific impulse range, minimum thrust can also drop to about 40 by adjusting acceleration voltage and working medium flow
μN.It can get the continuously adjustable thrust of 96 μ N-503 μ N, specific impulse 416s when general power continuously adjusts in 12.3W-31.4W
~2190s.
The thruster of the present embodiment can reach 1 μ N resolving power and noise level at present, this mainly by power supply processing unit and
The influence of radio-frequency power supply, theoretically if point of 0.1 μ N will be able to achieve after being replaced with super voltage-stabilizing power supply processing unit and radio-frequency power supply
Distinguish power and noise level.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1. the semielliptical type radio frequency-ion microthruster that a kind of resolving power is micro-ox level characterized by comprising ionisation chamber is penetrated
Frequency antenna, gas handling system, shielding case, ion-optic system, welding connector；The ionisation chamber is semielliptical shape, ionizes chamber inlet
Gas handling system is connected, outlet connects the ion-optic system；The shielding case is located at outside ionisation chamber；It is penetrated on radio-frequency antenna is logical
Frequency electric current, for generating eddy current field in the ionisation chamber, the welding connector is fixed on the shielding case；
The radio-frequency antenna is wound on the outside of semielliptical shape ionisation chamber, realizes impedance matching using LC resonance and frequency modulation technology；
The gas handling system includes sequentially connected air inlet steel pipe, hose, gas distributor；The gas distributor is preposition ring
Shape gas distributor.
2. radio frequency-ion microthruster as described in claim 1, it is characterised in that:
The shielding case is Al-alloy casing, for the electromagnetic wave that shielded radio frequency antenna launches outward, in order to avoid interference satellite other
Electronic system, while playing the role of fixed, support other component；The welding connector to the positive and negative high-tension cable of fixation and
Radio-frequency cable.
3. radio frequency-ion microthruster as claimed in claim 2, it is characterised in that:
The ion-optic system is made of screen, dish-shaped accelerating grid, dish-shaped three grid of decelerating screen from the inside to the outside, wherein screen
Material be molybdenum, meet positive high voltage 900V~1800V；Dish accelerate grid material be polymer graphite, connect negative high voltage -100V~-
300V；Dish-shaped deceleration grid material is invar and is grounded.
4. radio frequency-ion microthruster as claimed in claim 3, it is characterised in that:
The material of the ionisation chamber is aluminium oxide ceramics, and outer surface has spiral groove, and the radio-frequency antenna is wound on described recessed
In slot.
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| CN201611160348.2A CN106793441B (en) | 2016-12-15 | 2016-12-15 | A kind of resolving power is the semielliptical type radio frequency-ion microthruster of micro-ox level |
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| CN201611160348.2A CN106793441B (en) | 2016-12-15 | 2016-12-15 | A kind of resolving power is the semielliptical type radio frequency-ion microthruster of micro-ox level |
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| CN108005868A (en) * | 2017-11-29 | 2018-05-08 | 哈尔滨工业大学 | A kind of anode-cold air thruster combining air feeding cusped magnetic field plasma thruster |
| CN111456921B (en) * | 2019-01-22 | 2021-10-15 | 哈尔滨工业大学 | Colloid thruster based on microwave enhancement |
| CN110230581B (en) * | 2019-06-13 | 2020-05-08 | 哈尔滨工业大学 | micro-Newton-level ion propulsion device for vortex resonance ionization |
| CN110469474B (en) * | 2019-09-04 | 2020-11-17 | 北京航空航天大学 | Radio frequency plasma source for microsatellite |
| CN113357109B (en) * | 2021-06-30 | 2022-07-15 | 哈尔滨工业大学 | Ignition device of radio frequency ion thruster |
| CN113404658B (en) * | 2021-06-30 | 2022-03-18 | 哈尔滨工业大学 | Self-neutralizing radio frequency ion thruster |
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| US7808353B1 (en) * | 2006-08-23 | 2010-10-05 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Coil system for plasmoid thruster |
| IL231085A (en) * | 2014-02-23 | 2015-11-30 | Gil Berl | Ion thruster |
| WO2016178701A1 (en) * | 2015-05-04 | 2016-11-10 | Craig Davidson | Thrust augmentation systems |
| CN106092399B (en) * | 2016-05-20 | 2020-03-20 | 中国人民解放军战略支援部队航天工程大学 | Spaceflight micro thruster impulse measuring table based on torsion balance |
| CN105934063B (en) * | 2016-06-02 | 2018-06-08 | 燕山大学 | A kind of ionized formula plasma propeller |
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