阅读说明：本技术 可应用于多流态的智能控制吸气式电推进系统 (Intelligent control air suction type electric propulsion system applicable to multiple flow states ) 是由 吴必琦 吴建军 程玉强 张宇 李健 谭胜 欧阳� 杜忻洳 于 2019-10-29 设计创作，主要内容包括：本发明属于航天电推进技术领域,公开了可应用于多流态的智能控制吸气式电推进系统,本发明利用超低轨道稀薄气体作为工质进行姿轨控制以及阻力补偿推进。本发明通过抛物线型进气道将气体收集进入智能反馈增压系统,由分子泵与气泵对气体工质进行智能反馈增压并存入工质储箱,以供应由七组电推力器组成的混合型推力器系统产生推力,可实现多种推力模式,达到了姿轨控制以及阻力补偿的目的。该推进系统具有可应用于50km-250km超低轨道连续流、自由分子流等多流态工作环境的优势,可使卫星在超低轨道稳定长期工作,在该轨道上的星载设备效率将会大大提高,在空间气象、大气模型、地球电场监控、地球遥感等领域都有着很大的开发价值。(The invention belongs to the technical field of aerospace electric propulsion, and discloses an intelligent control air suction type electric propulsion system applicable to multiple flow states. The invention collects the gas into the intelligent feedback supercharging system through the parabolic air inlet channel, intelligently feeds back and supercharges the gas working medium by the molecular pump and the air pump and stores the gas working medium into the working medium storage tank so as to supply a mixed thruster system consisting of seven groups of electric thrusters to generate thrust, thereby realizing various thrust modes and achieving the purposes of attitude and orbit control and resistance compensation. The propulsion system has the advantages of being applicable to multi-flow working environments such as 50km-250km ultra-low orbit continuous flow, free molecular flow and the like, can enable the satellite to stably work for a long time in the ultra-low orbit, greatly improves the efficiency of satellite-borne equipment on the orbit, and has great development value in the fields of space meteorology, atmospheric models, earth electric field monitoring, earth remote sensing and the like.)

1. The intelligent control air suction type electric propulsion system applicable to multiple flow states is characterized by comprising an air inlet channel (1), an intelligent feedback pressurization system (2), a mixed thruster system (4), a control system (5) and an energy supply system; the air inlet (1) is parabolic in structure and comprises a front end inlet and a rear end outlet, wherein the front end inlet is a windward part of the system, the rear end outlet is connected with the intelligent feedback pressurization system (2), and the air inlet (1) is used for preliminarily compressing incoming air; the intelligent feedback pressurization system (2) comprises a pump body, a manometer and a working medium storage tank; the pump body comprises a molecular pump (21) suitable for free molecular flow and an air pump (23) suitable for low-pressure continuous flow, the molecular pump (21), the air pump (23) and the working medium storage tank (25) are sequentially connected in series according to an inflow sequence, the molecular pump (21) is connected to an outlet at the rear end of the air inlet channel (1), and a pressure gauge a (22) and a pressure gauge b (24) are respectively arranged at the front end of the air pump (23) and the working medium storage tank (25), connected with the control system (5) and respectively used for feeding back and adjusting the power of the molecular pump (21) and the air pump (23); the hybrid thruster system (4) comprises 7 electric thrusters and 7 flow limiting valves, and the control system (5) respectively controls the power of the electric thrusters and the flow rate of the flow limiting valves; 7 electric thrusters of the hybrid thruster system (4) are densely arranged in parallel, wherein (41), (43), (45) and (47) are magnetic plasma thrusters, and (42), (44) and (46) are ion thrusters; the control system (5) is provided with a wireless signal receiving device and a wired signal input port, and controls the working states of the intelligent feedback pressurization system (2) and the hybrid thruster system (4) by processing a wireless remote control signal and an input feedback signal; the energy supply system comprises a battery and a solar panel (3), the solar panel (3) covers the surface of the shell of the electric propulsion system, no extra resistance is generated, and the charging state is kept in work; the energy supply system is connected with the intelligent feedback pressurization system (2), the hybrid thruster system (4) and the control system (5) to provide power for the systems; the air inlet channel (1) generates a shock wave effect in a continuous flow gas environment and compresses an incoming flow gas flow; compressing the incoming flow gas particles by utilizing a parabolic mirror reflection focusing effect in a free molecular flow gas environment; the two effects act synergistically in the transition flow state; the primarily compressed gas enters an intelligent feedback pressurization system (2) for further pressurization so as to ensure that good compression effects can be obtained in different orbit atmospheric environments; the working state of the molecular pump (21) is subjected to negative feedback regulation by a pressure gauge a (22); when the pressure of the pressure gauge a (22) is communicated and the air pressure does not meet the working requirement of the air pump (23), the power of the molecular pump (21) is increased through the control system (5) to improve the air density in the system; the working state of the air pump (23) is subjected to negative feedback regulation by a pressure gauge b (24); when the air pressure of a working medium storage tank (25) communicated with the pressure gauge b (24) does not reach a rated value, the air pump (23) is controlled to continuously work through the control system (5); and the smaller the reading of the pressure gauge b (24), the higher the working power of the feedback air pump (23) is, so as to achieve the purpose of ensuring that the working medium in the storage tank can meet the task requirement.

2. The intelligent control air-breathing electric propulsion system applicable to multiple flow regimes according to claim 1, wherein the hybrid thruster system is provided with 4 magnetic plasma thrusters (41), (43), (45), (47) and 3 ion thrusters (42), (44), (46), wherein in a low-orbit high-flow-rate environment, the magnetic plasma thrusters (41), (43), (45), (47) are activated, the ignition demand flow rate is high, and the thrust density is high; in a high-rail low-flow-rate environment, the ion thrusters (42), (44) and (46) are started, the ignition required flow rate is low, the thrust density is small, and the control precision is high.

3. The intelligent control air-breathing electric propulsion system applicable to multiple flow regimes according to claim 1, characterized in that the parabolic focus of the parabolic air inlet duct (1) is located outside the outlet of the rear end of the air inlet duct; when the free molecular flow environment works, the molecular thermal motion speed is far less than the speed of an aircraft, and incoming flow molecules can be regarded as horizontal incoming flow; due to the geometric focusing characteristic of the parabola, the particles are focused to the focus of the parabola through wall surface mirror reflection under the design of the air inlet channel, and the designed focus is positioned outside the rear end outlet, so that the air inlet efficiency of the air inlet channel can be effectively improved.

4. The intelligent control air suction type electric propulsion system applicable to the multi-flow state as claimed in claim 1, wherein the wall surface coating of the air inlet channel (1) is a mirror coating such as magnesium fluoride suitable for oxygen-containing and high-temperature environments, so as to improve the air inlet efficiency of the thin atmosphere free molecular flow during the operation of a higher orbit.

5. The intelligent control air-breathing electric propulsion system applicable to multiple flow states as claimed in claim 1, wherein the electric conduction part in the hybrid thruster system (4) is coated with gold, and the electric conduction part is not required to be coated with ceramic material; the other parts of the air duct and the air inlet duct (1) are made of stainless steel materials containing nickel and molybdenum.

6. The intelligent control air suction type electric propulsion system applicable to multiple flow states as claimed in claim 1, wherein the solar panels (3) in the energy supply system are covered on the other surfaces except the inlet surface of the air inlet channel (1) and the outlet surface of the hybrid thruster system (4), namely four surfaces with the normal perpendicular to the flight direction, and no additional resistance is generated by the solar panels (3).

7. An intelligent controlled air-breathing electric propulsion system applicable to multiple flow regimes according to claim 1, characterized in that the satellite-borne equipment of the satellite to which the electric propulsion system is applied is placed inside the hexahedron comprised by the air intake duct (1), the hybrid thruster system (4) and the four solar panels (3), and the satellite is in the shape of a long strip and works with minimum resistance.

8. The intelligent control air-breathing electric propulsion system applicable to multiple flow states as claimed in claim 1, wherein in the hybrid thruster system (4), 7 thrusters are densely arranged in parallel, wherein the magnetic plasma thruster (41) is located at the central point, and the other 3 magnetic plasma thrusters (43), (45), (47) and 3 ion thrusters (42), (44) and (46) are alternately arranged around the 6 vertexes of a regular hexagon.

9. The intelligent control air suction type electric propulsion system applicable to multiple flow states as claimed in claim 1, wherein in the hybrid thruster system (4), the front ends of 7 electric thrusters are respectively connected with a flow limiting valve, and the 7 electric thrusters and the flow limiting valves thereof are respectively and independently controlled by the control system (5) to meet the requirements of multiple different thrust states.

10. The intelligent control air-breathing electric propulsion system applicable to multiple flow states as claimed in claim 1, wherein the hybrid thruster system (4) is provided with 4 magnetic plasma thrusters (41), (43), (45), (47) and 3 ion thrusters (42), (44) and (46), for special task requirements, the two thrusters work together under the condition of sufficient working fluid in the storage tank, the working power of the thrusters and the flow rate of the flow limiting valve are controlled by the control system, so that the purpose of accurately adjusting the thrust of each thruster is achieved, and resultant force and moment are generated by respectively controlling the thrust of 7 thrusters, so as to meet the task requirements of attitude and orbit control, resistance compensation and the like.

Technical Field

The invention belongs to the technical field of aerospace electric propulsion, and particularly relates to an intelligent control air suction type electric propulsion system which can be mechanically switched and can be applied to continuous flow and free molecular flow.

Background

With the development of aerospace technology, the space orbit is gradually saturated. The ultra-low orbit space region with the height of 50km-250km has higher development potential for satellite work, the efficiency of satellite-borne equipment on the orbit can be greatly improved due to the lower orbit height, and the ultra-low orbit space region has great development value in the fields of space weather, atmosphere models, earth electric field monitoring, earth remote sensing and the like. However, due to the existence of thin atmosphere on the ultra-low orbit, compared with the vacuum environment of the high orbit, the aircraft can generate aerodynamic resistance which enables the orbit to be highly attenuated when the aircraft works in the ultra-low orbit, the service life of the satellite is limited, and the orbit region is still in an incompletely developed state at present.

The atmospheric environment at heights ranging from 50km to 250km varies considerably. As the orbital height increases, the atmospheric density decreases continuously and the orbital atmosphere transitions from a continuous flow regime to a free molecular flow regime. The particular operating environment has particular operational requirements for the aircraft.

The electric propulsion has the characteristics of stable performance, high specific impulse, adjustable thrust, low cost and the like, and is the popular research direction in the field of aerospace propulsion at present. Due to its characteristics, electric propulsion has good effects and performance in resistance compensation. An earth gravity field and ocean circulation exploration satellite project (GOCE) satellite of the European and air Bureau carries 40kg of xenon working medium, an electric propulsion system is used for carrying out resistance compensation, the task life of more than 4 years is realized on a 220km orbit, and the feasibility of carrying out resistance compensation by using air-breathing electric propulsion is verified.

However, the onboard propellant quantity still limits the working life of the satellite. When the propellant used for resistance compensation is exhausted, the satellite cannot continue to hold orbit under the influence of aerodynamic drag and will derail and fall. Carrying too much propellant not only limits the payload, but also increases launch difficulty. Considering that the electric propulsion technology can use gas as working medium to carry out ionization propulsion, in order to realize longer service life and higher effective load, the atmosphere of the collecting track can be used as the working medium to carry out propulsion, and the resistance compensation work can be completed on the ultra-low track under the condition of carrying less or even not carrying the working medium.

Disclosure of Invention

Aiming at the problem that the 50km-250km ultra-low track is not completely developed due to the existence of resistance, the invention provides the air suction type electric propulsion system which can work in a cross-track mode, is suitable for an intelligent feedback pressurization system and can realize attitude and orbit control and resistance compensation. The invention can realize flexible maneuvering within the ultra-low track range of 50km to 250km, can work in various flow states such as lower track continuous flow, higher track free molecular flow and transition flow between the lower track continuous flow and the higher track free molecular flow, and meets various task requirements.

The technical scheme of the invention is as follows:

the intelligent control air suction type electric propulsion system applicable to multiple flow states is composed of an air inlet channel, an intelligent feedback pressurization system, a mixed thruster system, a control system and an energy supply system.

The air inlet channel is parabolic in structure and comprises a front end inlet and a rear end outlet, wherein the front end inlet is a windward part of the system, the rear end outlet is connected with the intelligent feedback supercharging system, and the air inlet channel is used for preliminarily compressing incoming air.

The intelligent feedback pressurization system comprises a pump body, a manometer and a working medium storage tank.

The pump body comprises an air pump suitable for low-pressure continuous flow and a molecular pump suitable for free molecular flow, the molecular pump, the air pump and the working medium storage tank are sequentially connected in series according to an incoming flow sequence, the molecular pump is connected to an outlet at the rear end of the air inlet channel, and the working medium storage tank is connected with the mixed thruster system. The two pressure gauges are respectively arranged at the front end of the air pump and the working medium storage tank, are connected with the control system and are respectively used for feeding back and adjusting the power of the molecular pump and the air pump.

The hybrid thruster system comprises 7 electric thrusters and 7 flow limiting valves, and the control system respectively controls the power of the electric thrusters and the flow rate of the flow limiting valves.

The electric thrusters of the hybrid thruster system are densely arranged in parallel and comprise 4 magnetic plasma thrusters and 3 ion thrusters.

The control system is provided with a wireless signal receiving module and a wired signal input port, and controls the working states of the intelligent feedback pressurization system and the hybrid thruster system by processing a wireless remote control signal and an input feedback signal.

The energy supply system comprises a battery and a solar panel, the solar panel covers the surface of the shell of the electric propulsion system, no additional resistance is generated, and the charging state is kept in work. The energy supply system is connected with the intelligent feedback pressurization system, the mixed thruster system and the control system to provide power for the systems. In order to ensure the efficiency of solar energy supply, the orbit of the satellite applying the system is limited to a sun synchronous orbit.

The air inlet channel generates a shock wave effect in a continuous flow gas environment and compresses an incoming flow gas flow; compressing the incoming flow gas particles by utilizing a parabolic mirror reflection focusing effect in a free molecular flow gas environment; the two effects act synergistically in the transition flow state. And the gas after the initial compression enters an intelligent feedback pressurization system for further pressurization so as to ensure that the gas can obtain good compression effects in different track atmospheric environments.

The working state of the molecular pump is negatively fed back and regulated by a pressure gauge a. When the pressure gauge a is communicated and the air pressure does not meet the working requirement of the air pump, the power of the molecular pump is increased through the control system so as to improve the air density in the system. Generally, a molecular pump operates when the atmospheric environment is in a free molecular flow state.

The working state of the air pump is negatively fed back and regulated by a pressure gauge b. When the air pressure of the storage tank communicated with the pressure gauge b does not reach a rated value, the air pump is controlled by the control system to continuously work. And the smaller the reading of the pressure gauge b is, the higher the working power of the feedback air pump is, so that the aim of ensuring that the working medium in the storage tank can meet the task requirement is fulfilled.

Preferably, the hybrid thruster system is provided with 4 magnetic plasma thrusters and 3 ion thrusters, wherein in a low-orbit high-flow-rate environment, the magnetic plasma thrusters are started, the ignition demand flow rate is high, and the thrust density is high; in a high-rail low-flow-rate environment, the ion thruster is started, the ignition required flow rate is low, the thrust density is small, and the control precision is high.

Preferably, the parabolic focus of the parabolic air inlet is positioned outside the outlet of the rear end of the air inlet. When the free molecular flow environment works, the molecular heat motion speed is far less than the aircraft speed, and the incoming flow molecules can be regarded as horizontal incoming flow. Due to the geometric focusing characteristic of the parabola, the particles are focused to the focus of the parabola through wall surface mirror reflection under the design of the air inlet channel, the design focus is positioned outside the rear end outlet, the air inlet efficiency of the air inlet channel can be effectively improved, and the effect is obvious.

Preferably, the wall surface coating of the air inlet channel is a mirror surface coating such as magnesium fluoride and the like suitable for oxygen-containing and high-temperature environments, so that the air inlet efficiency of the rarefied atmosphere free molecular flow during the operation of a higher orbit is improved.

Preferably, the conductive part in the hybrid thruster system is a gold plating layer, and the conductive part is not required to be made of ceramic material; the other parts of the air duct and the air inlet channel are made of stainless steel materials containing nickel and molybdenum.

Preferably, the solar panels in the energy supply system cover the other surfaces except the inlet surface of the air inlet and the outlet surface of the hybrid thruster system, namely four surfaces with the normal perpendicular to the flight direction, and no additional resistance is generated by the solar panels.

Preferably, satellite-borne equipment of a satellite applied to the electric propulsion system is arranged in the air inlet channel, the hybrid thruster system and a hexahedron included by the four solar panels, and the satellite is in a long shape and works with the minimum resistance.

Preferably, in the hybrid thruster system, 7 thrusters are densely arranged in parallel, wherein 1 magnetic plasma thruster is located at a central point, and the other 3 magnetic plasma thrusters and 3 ion thrusters are alternately arranged with 6 vertexes of a regular hexagon as a circle center.

Preferably, in the hybrid thruster system, the front ends of the 7 electric thrusters are respectively connected with a current limiting valve, and the 7 electric thrusters and the current limiting valves thereof are respectively and independently controlled by the control system, so that the requirements of various different thrust states are met.

Preferably, the hybrid thruster system is provided with 4 magnetic plasma thrusters and 3 ion thrusters, for special task requirements, the two thrusters work in a cooperative manner under the condition that the working medium of the storage tank is sufficient, the working power of the thrusters and the flow rate of the flow limiting valve are controlled by the control system, so that the use purpose of accurately adjusting the thrust of each thruster is achieved, and the combined force and the moment are generated by respectively controlling the thrust of the 7 thrusters so as to meet the task requirements of attitude and orbit control, resistance compensation and the like.

The invention has the beneficial effects that:

1. the invention can discharge by absorbing the atmosphere as the working medium to generate thrust, and can ensure that the satellite can maintain long-term work under the condition of little or even no working medium, thereby increasing the effective load and reducing the satellite launching and running cost;

2. the hybrid thruster system can realize the functions of track change, resistance compensation, attitude adjustment and the like by respectively controlling the thrust, so that the satellite flexibly maneuvers within the working track range according to task requirements;

3. the invention improves the feasibility of the satellite working in the ultra-low orbit within the range of 50km to 250km, and compared with other high orbits, the satellite working on the ultra-low orbit has higher equipment efficiency and can meet more task requirements;

4. one advantage of the invention is that the satellite working in the ultra-low orbit can fall into the atmosphere for dissociation after the task is finished due to the existence of the atmospheric resistance, so that the invalid satellite can be prevented from becoming space garbage.

Drawings

FIG. 1 is a system block diagram;

FIG. 2 is a block diagram of an intelligent feedback boosting system;

FIG. 3 is a schematic diagram of the operation of the inlet in the free molecular flow regime;

FIG. 4 is a block diagram of a hybrid thruster system;

figure 5 is a schematic view of a solar panel.

The reference numbers illustrate:

1-an air inlet channel; 2-an intelligent feedback supercharging system; 3-a solar panel; 4-hybrid thruster system; 5-a control system; 21-a molecular pump; 22-pressure gauge a; 23-an air pump; 24-pressure gauge b; 25-a working medium storage tank; 41. 43, 45, 47-magnetic plasma thruster; 42. 44, 46-ion thruster.

Detailed Description

The invention will be further described in detail with reference to the accompanying drawings.

The application background of the invention is a track with the height ranging from 50km to 250km, wherein the atmosphere at the lower part of the track is in a continuous flow state, the atmosphere at the upper part of the track is in a free molecular flow state, and the atmosphere at the middle section is in a transition flow state. As the orbit increases, the atmospheric density decreases, and different flow state working modes are introduced respectively.

The intelligent control air suction type electric propulsion system applicable to multiple flow states is composed of an air inlet channel 1, an intelligent feedback pressurization system 2, a mixed thruster system 4, a control system 5 and an energy supply system.

The air inlet 1 is in a parabolic shape and comprises a front end inlet and a rear end outlet, wherein the front end inlet is a windward part of the system, the rear end outlet is connected with an intelligent feedback supercharging system 2, and the air inlet 1 is used for preliminarily compressing incoming air.

The intelligent feedback pressurization system 2 comprises a pump body, a manometer and a working medium storage tank.

The pump body comprises a molecular pump 21 suitable for free molecular flow and an air pump 23 suitable for low-pressure continuous flow, the molecular pump 21, the air pump 23 and the working medium storage tank 25 are sequentially connected in series according to an incoming flow sequence, the molecular pump 21 is connected to an outlet at the rear end of the air inlet channel 1, and a pressure gauge a 22 and a pressure gauge b 24 are respectively arranged at the front end of the air pump 23 and the working medium storage tank 25, connected with the control system 5 and respectively used for feeding back and adjusting the power of the molecular pump 21 and the power of the air pump 23.

The hybrid thruster system 4 comprises 7 electric thrusters and 7 flow limiting valves, and the control system 5 respectively controls the power of the electric thrusters and the flow rate of the flow limiting valves.

The 7 electric thrusters of the hybrid thruster system 4 are densely arranged in parallel, wherein 41, 43, 45 and 47 are magnetic plasma thrusters, and 42, 44 and 46 are ion thrusters.

The control system 5 is provided with a wireless signal receiving device and a wired signal input port, and controls the working states of the intelligent feedback pressurization system 2 and the hybrid thruster system 4 by processing a wireless remote control signal and an input feedback signal.

The energy supply system comprises a battery and a solar panel 3, the solar panel 3 covers the surface of the shell of the electric propulsion system, no extra resistance is generated, and the charging state is kept in work. The energy supply system is connected with the intelligent feedback pressurization system 2, the hybrid thruster system 4 and the control system 5 to provide power for the systems. In order to ensure the efficiency of solar energy supply, the orbit of the satellite applying the system is limited to a sun synchronous orbit.

The air inlet channel 1 generates a shock wave effect in a continuous flow gas environment and compresses an incoming flow gas flow; compressing the incoming flow gas particles by utilizing a parabolic mirror reflection focusing effect in a free molecular flow gas environment; the two effects act synergistically in the transition flow state. The gas after preliminary compression enters into the intelligent feedback pressurization system 2 for further pressurization so as to ensure that good compression effect can be obtained in different track atmospheric environments.

The operating state of the molecular pump 21 is negatively fed back and regulated by a pressure gauge a 22. When the pressure gauge a 22 communicates that the air pressure does not meet the operation requirement of the air pump 23, the power of the molecular pump 21 is increased by the control system 5 to increase the gas density in the system. Generally, a molecular pump operates when the atmospheric environment is in a free molecular flow state.

The working state of the air pump 23 is negatively fed back and regulated by the pressure gauge b 24. When the air pressure of the working medium storage tank 25 communicated with the pressure gauge b 24 does not reach a rated value, the control system 5 controls the air pump 23 to continuously work. And the smaller the reading of the pressure gauge b 24 is, the higher the working power of the feedback air pump 23 is, so as to achieve the purpose of ensuring that the working medium in the storage tank can meet the task requirement. Generally, the air pump 23 is continuously operated in the full track range of the system operation.

Preferably, the hybrid thruster system is provided with 4 magnetic plasma thrusters 41, 43, 45 and 47 and 3 ion thrusters 42, 44 and 46, wherein in a low-rail high-flow-rate environment, the magnetic plasma thrusters 41, 43, 45 and 47 are activated, the ignition demand flow rate is high, and the thrust density is high; in a higher rail low flow rate environment, the ion thrusters 42, 44, 46 are enabled, with low firing demand flow rate, low thrust density, and high control accuracy.

Preferably, the parabolic focus of the parabolic air inlet 1 is located outside the outlet of the rear end of the air inlet. When the free molecular flow environment works, the molecular heat motion speed is far less than the aircraft speed, and the incoming flow molecules can be regarded as horizontal incoming flow. Due to the geometric focusing characteristic of the parabola, the particles are focused to the focus of the parabola through wall surface mirror reflection under the design of the air inlet channel, the design focus is positioned outside the rear end outlet, the air inlet efficiency of the air inlet channel can be effectively improved, and the effect is obvious.

Preferably, the wall surface coating of the air inlet channel 1 is a mirror surface coating such as magnesium fluoride and the like suitable for oxygen-containing and high-temperature environments, so that the air inlet efficiency of the rarefied atmosphere free molecular flow during the operation of a higher orbit is improved.

Preferably, the conductive part in the hybrid thruster system 4 is a gold plating layer, and the conductive part is not required to be made of a ceramic material; the other parts of the air duct and the air inlet channel 1 are made of stainless steel materials containing nickel and molybdenum.

Preferably, the solar panels 3 in the energy supply system cover the other surfaces except the inlet surface of the air inlet 1 and the outlet surface of the hybrid thruster system 4, namely four surfaces with the normal perpendicular to the flight direction, and no additional resistance is generated by the solar panels 3.

Preferably, satellite-borne equipment of a satellite applied by the electric propulsion system is arranged in a hexahedron included by the air inlet 1, the hybrid thruster system 4 and the four solar panels 3, and the satellite is in a long shape and works with the minimum resistance.

Preferably, in the hybrid thruster system 4, 7 thrusters are densely arranged in parallel, wherein the magnetic plasma thruster 41 is located at a central point, and the other 3 magnetic plasma thrusters 43, 45 and 47 and the 3 ion thrusters 42, 44 and 46 are alternately arranged around 6 vertexes of a regular hexagon.

Preferably, in the hybrid thruster system 4, the front ends of 7 electric thrusters are respectively connected with a current limiting valve, and the control system 5 is used for separately controlling the 7 electric thrusters and the current limiting valves thereof so as to meet the requirements of various different thrust states.

Preferably, the hybrid thruster system 4 is provided with 4 magnetic plasma thrusters 41, 43, 45 and 47 and 3 ion thrusters 42, 44 and 46, for special task requirements, the two thrusters work cooperatively under the condition that the working medium of the storage tank is sufficient, the working power of the thrusters and the flow rate of the flow limiting valve are controlled by the control system, so that the purpose of accurately adjusting the thrust of each thruster is achieved, and resultant force and moment are generated by respectively controlling the thrust of the 7 thrusters, so that the task requirements of attitude and orbit control, resistance compensation and the like are met.

The embodiments described above are presented to enable a person having ordinary skill in the art to make and use the invention. It will be readily apparent to those skilled in the art that various modifications to the above-described embodiments may be made, and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications to the present invention based on the disclosure of the present invention within the protection scope of the present invention.