CN211642644U

CN211642644U - Low-orbit satellite with flat structure

Info

Publication number: CN211642644U
Application number: CN201922486225.3U
Authority: CN
Inventors: 唐宇峰; 张雅彬; 张振兴
Original assignee: Beijing Commsat Technology Development Co Ltd
Current assignee: Beijing Commsat Technology Development Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-10-09
Anticipated expiration: 2029-12-30

Abstract

The embodiment of the invention provides a low-orbit satellite with a flat structure, wherein the main envelope of a satellite body is a flat cuboid, and satellite equipment is respectively distributed on the front side and the back side of a-Z plate; the solar cell wing is curled and folded on one side of the satellite before being unfolded, and is unfolded by the elasticity of the framework during unfolding; the system also comprises a comprehensive electronic system which is used for coordinating and controlling each device of the satellite and carrying out information interaction with each device of the satellite through RS422, RS485, CAN bus, GPIO and sensor acquisition interface. The size of the whole satellite provided by the embodiment of the application is greatly reduced, the requirement of enveloping in the fairing of the current mainstream carrier rocket can be met, and the space utilization rate in the fairing of the rocket is greatly improved.

Description

Low-orbit satellite with flat structure

Technical Field

The invention relates to the field of aerospace, in particular to a low-orbit satellite with a flat structure.

Background

With the rapid development of internet applications, the demand for internet access services has increased dramatically. The space exploration technology company (SpaceX) in the united states developed low-orbit internet constellation deployment in the form of one arrow 60 star twice in 5 and 11 months in 2019, and the construction speed is far beyond the expectations of the industry. The advanced satellite structure configuration, launching mode and inter-satellite separation unlocking mode thereof subvert the design and launching mode of the traditional satellite. In recent years, companies such as OneWeb, Amazon, Telesat, SpaceX, boeing and the like have proposed low-earth-orbit communication satellite constellation plans. Research on small satellites and application technologies thereof is actively carried out in China, and particularly, national internet satellite constellations can be rapidly deployed in the coming years.

Disclosure of Invention

The embodiment of the application provides a low-orbit satellite with a flat structure, wherein the main envelope of a satellite body is a flat cuboid and comprises +/-Z plates which are parallel up and down, +/-Y plates which are parallel left and right and +/-X plates which are parallel front and back; the Z board is used for installing a main board of satellite equipment, and the satellite equipment is respectively distributed on the front side and the back side of the Z board.

The solar cell wing is designed by adopting a flexible material, and the power generation unit is adhered to the flexible material; the solar cell wing is curled and folded at one side of the satellite before being unfolded and is unfolded by the elasticity of the framework.

Furthermore, the satellite adopts a heat control coating, multiple layers of heat insulation materials, heat conduction material filling and a heat pipe as a main heat control mode, adopts closed-loop electric heating as an auxiliary heat control mode, and takes +/-Z and +/-Y as whole satellite heat dissipation surfaces as a main heat dissipation channel of equipment in the cabin.

Further, the-Z plate front side apparatus comprises: the system comprises an electric propulsion assembly, a space sensor, a magnetic torquer, a gyroscope, a magnetometer, a lithium battery, a power supply controller, a comprehensive electronic system and a load system; the electric propulsion assembly, the space sensor and the magnetic torquer are sequentially distributed on one side of the front surface of the Z plate, which is close to the Y plate; the gyroscope, the magnetometer, the lithium battery and the power supply controller are distributed in the middle of the front surface of the Z plate; the integrated electronic system and the loading system are stacked on one side of the front surface of the-Z board close to the-Y board. Furthermore, the number of the magnetometers is 2, and the magnetometers are arranged vertically; the gyroscope comprises 2 MEMS gyroscopes and a fiber-optic gyroscope which are vertically arranged; the number of the magnetic torquers is 3.

Further, the integrated electronic system is used for coordination and control of devices of the satellite, and comprises: the satellite-borne computer, the secondary power management module, the UV measurement and control machine and/or the GPS receiver perform information interaction with each satellite device through the RS422, the RS485, the CAN bus, the GPIO and the sensor acquisition interface. Furthermore, the satellite-borne computer, the secondary power management module, the UV measurement and control machine and/or the GPS receiver adopt a single-machine inorganic box design and are communicated through a mother board in a plug board mode.

Further, the payload system comprises a Ka communication payload, a V communication payload, and/or an L communication payload; and the Ka communication load processor and the V communication load processor adopt integrated machines.

Further, the load system also comprises a laser communication load, wherein the laser communication load comprises a PAT host, a PAT electric cabinet, a beacon laser, an optical switch and an optical communicator.

Further, the-Z plate reverse apparatus includes: 4 momentum wheels, 2 star sensors and a phased array antenna; the 4 momentum wheels and the 1 star sensor are arranged on one side, close to the + Y plate, of the reverse surface of the-Z plate; the phased array antenna and the other star sensor are arranged on one side, close to the Y plate, of the reverse side of the Z plate.

The satellite provided by the embodiment of the application adopts a flat integral structure design, an integrated on-satellite integrated electronic system and a flexible deployable solar wing, so that the volume of the whole satellite is greatly reduced, the requirement of enveloping in the fairing of the current mainstream carrier rocket can be met, and the space utilization rate in the fairing of the rocket is greatly improved.

Drawings

FIG. 1 is a schematic diagram illustrating an envelope of a satellite main body structure in a Z direction according to an embodiment of the present disclosure;

FIG. 2 is a top view of a satellite in the Z direction according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram illustrating a folded and unfolded state of a flexible solar cell wing according to an embodiment of the present application;

fig. 4 is a diagram illustrating an overall effect of a satellite according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; it should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

One embodiment of the application provides a low-orbit satellite with a flat structure, wherein a main envelope of a satellite body is a flat cuboid and comprises +/-Z plates which are parallel up and down, +/-Y plates which are parallel left and right, and +/-X plates which are parallel front and back; the-Z board is used for a main board for installing satellite equipment, and the equipment in the satellite cabin and the equipment outside the satellite cabin are respectively distributed on the front side and the back side of the-Z board.

In an optional embodiment, the solar cell module further comprises a solar cell wing, wherein the solar cell wing is made of a flexible material, and the power generation unit is adhered to the flexible material; the solar battery wing is curled and folded at one side of the satellite before being unfolded and is unfolded by the elasticity of the framework.

In an alternative embodiment, the satellite adopts a heat control coating, multiple layers of heat insulation materials, heat conduction material filling and a heat pipe as a main heat control mode, adopts closed-loop electric heating as an auxiliary heat control mode, and takes +/-Z and +/-Y as whole satellite heat dissipation surfaces as main heat dissipation channels of equipment in the cabin.

In an alternative embodiment, the-Z plate front face apparatus comprises: the system comprises an electric propulsion assembly, a sensor, a magnetic torquer, a gyroscope, a magnetometer, a lithium battery, a power supply controller, a comprehensive electronic system and/or a load system; the electric propulsion assembly, the space sensor and the magnetic torquer are sequentially distributed on one side of the front surface of the Z plate, which is close to the Y plate; the gyroscope, the magnetometer, the lithium battery and the power supply controller are distributed in the middle of the front surface of the Z plate; the integrated electronic system and the loading system are stacked on the front surface of the-Z board close to one side of the-Y board.

In an alternative embodiment, there are 2 magnetometers, placed perpendicular to each other; the gyroscope comprises 2 MEMS gyroscopes and a fiber-optic gyroscope which are vertically arranged; the number of the magnetic torquers is 3.

In an alternative embodiment, an integrated electronics system for coordinating and controlling devices of a satellite, comprising: the satellite-borne computer, the secondary power management module, the UV measurement and control machine and/or the GPS receiver perform information interaction with each satellite device through the RS422, the RS485, the CAN bus, the GPIO and the sensor acquisition interface.

In an optional embodiment, the on-board computer, the secondary power management module, the UV measurement and control machine and/or the GPS receiver adopt a single-machine inorganic box design and are communicated through a mother board in a plug-in mode.

In an alternative embodiment, the payload system includes a Ka communication payload, a V communication payload, and/or an L communication payload; and the Ka communication load processor and the V communication load processor adopt integrated machines.

In an alternative embodiment, the load system further comprises a laser communication load comprising a PAT host, a PAT electrical cabinet, a beacon laser, an optical switch, and an optical communicator.

In an alternative embodiment, the-Z plate counter device comprises: 4 momentum wheels, 2 star sensors and a phased array antenna; 4 momentum wheels and 1 star sensor are arranged on one side of the reverse side of the-Z plate, which is close to the + Y plate; the phased array antenna and the other star sensor are arranged on one side of the back surface of the-Z plate, which is close to the-Y plate.

Examples

Referring to fig. 1, the satellite uses a-Z board as a main board for installing satellite equipment, and the main structure of the satellite is enveloped as a flat cuboid, and the size of the satellite is designed as follows: 1360X 540X 370 mm. Due to the adoption of the flat structural design, the space utilization rate in the rocket fairing can be greatly improved, and the inner wrapping requirement of the fairing of the current mainstream carrier rocket can be met.

Referring to fig. 2, the layout of the satellite devices on the-Z board is as follows: the front surface of the-Z plate is close to one side of the + Y plate, and is provided with a discharge propulsion assembly 201, an inductance 202 and magnetic torquers (3) 203; the gyroscope (comprising a fiber-optic gyroscope 204 and 2 MEMS gyroscopes 205 which are vertically arranged), the magnetometer 206(2 are vertically arranged), the lithium battery 207 and the power supply controller 208 are positioned in the middle of the front surface of the-Z plate, and the load system and the integrated electronic system 209 are stacked together and positioned on one side of the front surface of the-Z plate close to the-Y plate. On the reverse side of the-Z plate, 4 momentum wheels and 1 star sensor are arranged on one side close to the + Y plate, and a phased array antenna and another star sensor are arranged on one side close to the-Y plate.

A flexible battery wing 210 is also included on one side of the satellite. The solar cell wing is designed by adopting a flexible material, the three-junction gallium arsenide solar cell is used as a power generation unit, and the power generation unit is adhered to the flexible material. The solar cell wings are rolled and folded on one side of the satellite before being unfolded, and are unfolded elastically by the framework when being unfolded, and the folded and unfolded states refer to fig. 3. The total area of the flexible solar wing is designed to be 3 square meters, the bus voltage is 29.4V, the maximum output power is 445W, and the flexible solar wing has obvious advantages in the aspects of weight, installation space, resource requirements and the like compared with the traditional rigid multi-plate. See fig. 4 for an overall effect diagram of the satellite.

The whole satellite adopts a thermal control scheme that passive thermal control technologies such as a thermal control coating, multiple layers of thermal insulation materials, a thermal conductive filler and a heat pipe are taken as main technologies, and an active thermal control technology of closed-loop electric heating control is taken as an auxiliary technology, and +/-Z and +/-Y are taken as whole satellite radiating surfaces and are taken as main radiating channels of equipment in a cabin. Control measures for enhancing heat conduction and heat pipe heat diffusion are adopted for high heat consumption platform equipment such as an in-cabin power supply controller and a momentum wheel and load equipment in the cabin; and for the short-term high-heat-consumption load equipment outside the cabin, control measures of enhancing radiation heat dissipation and assisting an electric heating part are adopted. In addition, for the equipment in the cabin, the equipment of the satellite can work within the temperature range of 0-30 ℃ through the heating sheet.

The comprehensive electronic system of the satellite comprises an on-board computer, a secondary power supply management module, a UV (ultraviolet) measurement and control machine and/or a GPS (global positioning system) receiver; the design of a single machine inorganic box is adopted, and the single machine inorganic box is communicated through a mother board in a plug board mode. The comprehensive electronic system of the satellite is responsible for coordination and control of all on-satellite devices, CAN complete functions of housekeeping management, attitude control, energy management, primary power distribution management, secondary power distribution management, GNSS analysis, telemetering data management, instruction management, time management, effective load management and the like, provides RS422, PPS, RS485, CAN, GPIO, a network interface and an AD digital temperature sensor acquisition interface, and realizes information interaction with all devices of the satellite.

The load system comprises: the Ka communication load consists of a processor and an antenna, and the Ka processor and the V processor are integrated; the V communication load consists of a parabolic antenna and a processor, and the Ka processor and the V processor are integrated; l communication load, which is composed of antenna and processor; the laser communication load is composed of a PAT host, a PAT electric cabinet 1, a PAT electric cabinet 2, a beacon laser, an optical switch and an optical communication machine.

The satellite provided by the embodiment of the application can realize the flat design of the satellite structure, realize that a single carrier rocket can contain more than 16 stars of launching capacity, improve the satellite launching efficiency by about 70%, reduce the constellation launching cost, and save the constellation construction cost by about 50%.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A low-orbit satellite with a flat structure is characterized in that the main envelope of a satellite body is a flat cuboid and comprises +/-Z plates which are parallel up and down, +/-Y plates which are parallel left and right, and +/-X plates which are parallel front and back; the Z board is used for installing a main board of satellite equipment, and the satellite equipment is respectively distributed on the front side and the back side of the Z board.

2. The satellite of claim 1, further comprising a solar wing, wherein the solar wing is made of a flexible material, and the power generation unit is adhered to the flexible material; the solar cell wing is curled and folded at one side of the satellite before being unfolded and is unfolded by the elasticity of the framework.

3. The satellite of claim 1, wherein the satellite adopts a thermal control coating, multiple layers of thermal insulation materials, thermal conductive material filling and heat pipes as a main thermal control mode, adopts closed-loop electric heating as an auxiliary thermal control mode, and uses ± Z and ± Y as whole-satellite heat dissipation surfaces as a main heat dissipation channel of equipment in a cabin.

4. A satellite according to any one of claims 1 to 3, wherein the-Z plate front face apparatus comprises: the system comprises an electric propulsion assembly, a sensor, a magnetic torquer, a gyroscope, a magnetometer, a lithium battery, a power supply controller, a comprehensive electronic system and/or a load system; the electric propulsion assembly, the space sensor and the magnetic torquer are sequentially distributed on one side of the front surface of the Z plate, which is close to the Y plate; the gyroscope, the magnetometer, the lithium battery and the power supply controller are distributed in the middle of the front surface of the Z plate; the integrated electronic system and the loading system are stacked on one side of the front surface of the-Z board close to the-Y board.

5. The satellite of claim 4, wherein the magnetometers are 2, arranged vertically to each other; the gyroscope comprises 2 MEMS gyroscopes and a fiber-optic gyroscope which are vertically arranged; the number of the magnetic torquers is 3.

6. The satellite of claim 4, wherein the integrated electronics system is configured for coordination and control of devices of the satellite, comprising: the satellite-borne computer, the secondary power management module, the UV measurement and control machine and/or the GPS receiver perform information interaction with each satellite device through the RS422, the RS485, the CAN bus, the GPIO and the sensor acquisition interface.

7. The satellite of claim 6, wherein the on-board computer, the secondary power management module, the UV measurement and control machine and/or the GPS receiver are designed as a stand-alone computer without a case and are connected through a motherboard in a plug-in manner.

8. The satellite of claim 4, wherein the payload system comprises a Ka communication payload, a V communication payload, and/or an L communication payload; and the Ka communication load processor and the V communication load processor adopt integrated machines.

9. The satellite of claim 8, wherein the payload system further comprises a laser communication payload comprising a PAT host, a PAT electrical cabinet, a beacon laser, an optical switch, and an optical communicator.

10. The satellite according to any one of claims 1 to 3, wherein the-Z plate reverse side device comprises: 4 momentum wheels, 2 star sensors and a phased array antenna; the 4 momentum wheels and the 1 star sensor are arranged on one side, close to the + Y plate, of the reverse surface of the-Z plate; the phased array antenna and the other star sensor are arranged on one side, close to the Y plate, of the back surface of the Z plate.