CN104683014B - One kind is communicated with host computer by WLAN and connects controlled satellite - Google Patents

Abstract

A satellite that communicates with an upper computer through a wireless local area network and is controlled. The satellite includes a satellite shell, an on-board bus, an on-board communication system, an on-board power supply system, and a collection of on-board subsystems. The on-board communication system is connected to each subsystem in the set of on-board subsystems; the on-board communication system communicates with the host computer through a wireless local area network, and the on-board communication system communicates with the on-board Each subsystem in the upper subsystem set communicates. Compared with the existing technology, only one host computer with wireless LAN communication function can perform remote control and telemetry, software upgrade and in-system debugging on the satellite provided by the present invention, effectively improving the speed of satellite research and development, reducing research and development costs, shortening the development cycle.

Description

A satellite that communicates with and is controlled by a host computer through a wireless local area network

technical field

The invention relates to an artificial satellite, in particular to an artificial satellite with a wireless local area network communication function.

Background technique

In the ground research and development stage of the satellite, it is necessary to continuously carry out remote control, telemetry, debugging and software upgrades. Satellites generally contain multiple subsystems. Any subsystem on the satellite must be debugged and tested separately. Updating the software of a certain subsystem usually requires the cooperation of multiple subsystems on the satellite. If one of the subsystems appears Design flaws that affect remote control, telemetry, and software updates of other subsystems. The realization of the above debugging and testing process requires the development of a special ground measurement and control wireless communication system and feeder wireless communication system, wherein the ground measurement and control wireless communication system is used for remote control and telemetry of satellites, and is a "kite line" for the connection between the ground and satellites , the feeding wireless communication system is used to realize the broadband data exchange between the satellite and the ground system. Generally, in order to meet the application requirements and testing requirements before satellite launch, at least two sets of ground measurement and control and ground wireless power feeding equipment need to be developed, one set is used for debugging in the clean room, and the other set is used for the launch site. The above debugging and testing process must be coordinated by special testers who open and control ground measurement and control and ground wireless power feeding equipment. This method greatly reduces the efficiency of satellite ground debugging and testing, and increases the material and human costs of satellite research and development. In order to solve the problem of inefficiency in the above-mentioned satellite ground commissioning process, the prior art proposes to connect an umbilical cord outside the satellite, and the umbilical cord not only provides power supply, but also has a communication function. However, not every subsystem has the function of communicating with the umbilical cord, and the umbilical cord is usually connected to special hardware and software. During the ground commissioning process, there are potential dangers such as electrostatic discharge and connection errors, which may cause power failures in the entire star. Serious problems such as system failures.

Contents of the invention

In view of this, it is indeed necessary to provide a satellite that can be easily debugged and controlled during the ground debugging stage.

A satellite that communicates with a host computer through a wireless local area network and is controlled. The satellite includes: a satellite housing, an on-board bus, an on-board power supply system, and a collection of on-board subsystems. The on-board bus and the on-board power supply Each subsystem in the system and the on-star subsystem set is connected; the on-star power supply system includes an input terminal and an output terminal, the input terminal is used to connect to an external power supply, and the output terminal is used to supply the on-star power supply Each subsystem in the subsystem set supplies power; the satellite further includes an on-board communication system, the on-board communication system communicates with the host computer through a wireless local area network, the on-board communication system is connected to the on-board bus, and the The on-board bus communicates with each subsystem in the set of on-board subsystems.

Compared with the prior art, the satellite provided by the present invention communicates with the host computer through the wireless local area network and accepts the control of the host computer. In the ground debugging stage before the satellite is launched, only one host computer with a wireless local area network communication function is needed. Remote control and telemetry, software upgrade and in-system debugging can be carried out on the satellite provided by the invention, thereby effectively improving the research and development speed of the satellite, reducing the research and development cost, and shortening the development cycle.

Description of drawings

Fig. 1 is a schematic diagram of the satellite structure provided by the first embodiment of the present invention.

Fig. 2 is a schematic diagram of a satellite structure provided by a second embodiment of the present invention.

Fig. 3 is the first installation mode of the on-board communication system provided by the present invention on the satellite.

Fig. 4 is a second installation mode of the on-board communication system provided by the present invention on the satellite.

Fig. 5 is a third installation mode of the on-board communication system provided by the present invention on the satellite.

Fig. 6 is a schematic diagram of the satellite provided by the present invention communicating with multiple host computers simultaneously.

Fig. 7 is the information exchange format when the satellite communicates with the upper computer provided by the present invention.

Description of main component symbols

satellite 100, 200 Star bus 10 On-board power system 20 satellite communication system 30, 40 WiFi communication module 31 Output Interface 32 microprocessor subsystem 33 WiFi communication module power supply circuit 34 On-board bus interface 35 wifi antenna 36 external switch 37 On-board subsystem collection 50 on-board computer 51 attitude control subsystem 52 Navigation subsystem 53 payload 54 cable 60 Satellite shell 70 separation device 400 PC 500, 510, 520 External power supply 600

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

The satellite which communicates with the host computer through the wireless local area network and is controlled by the satellite provided by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Fig. 1, the first embodiment of the present invention provides a satellite 100 that communicates with a host computer through a wireless local area network and accepts control, including: an on-board bus 10, an on-board power supply system 20, an on-board communication system 30 and an on-board distribution system. System set 50, the on-board subsystem set 50 includes multiple subsystems necessary to form a complete satellite. The on-star bus 10 is connected to each subsystem in the on-star communication system 30 and the on-star subsystem collection 50, the on-star communication system 30 communicates with the upper computer 500 through a wireless local area network, and the on-star communication system 30 communicates with each subsystem in the on-board subsystem collection 50 through the on-board bus 10, the on-board power supply system 20 includes an input terminal and an output terminal, and the input terminal is used to connect an external power supply 600 , the output end is used to supply power to the on-board communication system 30 and each subsystem in the on-board subsystem set 50 .

The on-board communication system 30 includes: a WiFi communication module 31 , a microprocessor subsystem 33 , a WiFi antenna 36 and an on-board bus interface 35 . The WiFi communication module 31 is connected with the WiFi antenna 36 and the microprocessor subsystem 33 ; the microprocessor subsystem 33 is connected with the on-board bus interface 35 .

The WiFi communication module 31 can transparently transfer the communication data from the upper computer 500 (such as a notebook computer) with a wireless local area network communication function to the microprocessor subsystem 33, and can simultaneously transmit the communication data from the microprocessor subsystem 33 The data is transparently transmitted to the upper computer 500 with wireless LAN communication function. Specifically, the WiFi communication module 31 is connected with the WiFi antenna 36 through a cable, and realizes wireless communication with the upper computer 500 with a wireless local area network communication function through the WiFi antenna 36; meanwhile, the WiFi communication module 31 The output interface 32 is connected with the microprocessor subsystem 33 to realize the communication with the microprocessor subsystem 33 . Common forms of the output interface 32 include: Universal Serial Interface (Universal Asynchronous Receiver/Transmitter, UART), Secure Digital Input and Output (Secure Digital Input and Output, SDIO) interface, Serial Peripheral Interface (Serial Peripheral Interface, SPI) Wait.

The type of the WiFi communication module 31 is not limited, what the WiFi communication module 31 described in this embodiment adopts is a WiFi transparent transmission module that internally integrates the TCP/IP protocol stack and the WiFi communication driver, and its external interface is a high-speed UART interface.

The microprocessor subsystem 33 receives data from the WiFi communication module 31 and converts it into a format compatible with the on-board bus 10 , and the converted data is sent to the on-board bus 10 through the on-board bus interface 35 . The microprocessor subsystem 33 simultaneously receives data from the onboard bus 10 and sends it to the WiFi communication module 31 . The microprocessor subsystem 33 has a data storage function, which can be realized by a single-chip microcomputer plus an external memory.

The WiFi antenna 36 is arranged on the surface of the satellite 100 and connected to the WiFi communication module 31 through a cable. The on-star bus 10 is used to realize the interconnection and intercommunication of various subsystems on the star. The on-star bus 10 can be a 1153B bus, a controller area network (Controller Area Network, CAN) bus, Ethernet, a low-voltage differential bus ( LowVoltage Differential Signal, LVDS), etc. The on-board bus 10 in this embodiment is a CAN bus.

The on-board power supply system 20 includes an input terminal and an output terminal, the input terminal is used to connect to an external power supply 600, and the output terminal is used to provide power to the on-board communication system 30 and the on-board subsystem set 50 Each subsystem in the power supply. The onboard power supply system 20 also has a dedicated electronic system management, and communicates with the onboard subsystem set 50 through the onboard bus 10 .

The on-board subsystem collection 50 is a collection of multiple subsystems other than the on-board power supply system 20 and on-board communication system 30, such as on-board computer, attitude control subsystem, navigation subsystem, on-board load, etc. , these subsystems are used to realize the necessary functions required to constitute a complete satellite. Specifically in this embodiment, the onboard subsystem set 50 includes an onboard computer 51 , an attitude control subsystem 52 , a navigation subsystem 53 , and an onboard payload 54 .

Referring to Fig. 2, the second embodiment of the present invention provides a satellite 200 improved on the basis of the first embodiment, including: on-board bus 10, on-board power supply system 20, on-board communication system 40 and on-board subsystem collection 50. The on-board subsystem set 50 includes multiple subsystems necessary to form a complete satellite. The on-board bus 10 is connected to the on-board communication system 40 and each subsystem in the on-board subsystem collection 50, the on-board communication system 40 communicates with the upper computer 500 through a wireless local area network, and the on-board The communication system 40 communicates with each subsystem in the on-board subsystem collection 50 through the on-board bus 10, and the on-board power supply system 20 includes an input terminal and an output terminal, and the input terminal is used for connecting external The power supply 600 , the output end is used to supply power to the on-board communication system 30 and each subsystem in the on-board subsystem set 50 .

The on-board communication system 40 includes: a WiFi communication module 31 , a microprocessor subsystem 33 , a WiFi antenna 36 , an on-board bus interface 35 , a WiFi communication module power supply circuit 34 and an external switch 37 . Described WiFi communication module 31 is connected with described WiFi antenna 36, microprocessor subsystem 33, and described microprocessor subsystem 33 is connected with described on-star bus interface 35; Described WiFi communication module power supply circuit 34 is described The WiFi communication module 31 supplies power; the external switch 37 controls the working state of the WiFi communication module power supply circuit 34 .

The main difference between this embodiment and the first embodiment is that: the on-board communication system 40 in this embodiment adds a WiFi communication module power supply circuit 34 and an external switch 37 on the basis of the first embodiment. The differences between this embodiment and the first embodiment will now be described in detail.

The WiFi communication module 31, the microprocessor subsystem 33, the WiFi antenna 36, and the on-board bus interface 35 in the first embodiment of the present invention are powered by the on-board power system 20 in a unified manner, and the switches inside the on-board power system 20 Control their power on and off status. The on-board communication system 40 in this embodiment adds a WiFi communication module power supply circuit 34 and an external switch 37 connected to the circuit on the basis of the first embodiment. The WiFi communication module power supply circuit 34 is connected to the WiFi communication module 31 to supply power for the WiFi communication module 31 exclusively. The external switch 37 controls the working state of the WiFi communication module power supply circuit 34 , one end thereof is electrically connected to the WiFi communication module power supply circuit 34 , and the other end is electrically connected to the on-board power system 20 through a connection line 60 . The external switch 37 can be an electronic or manual switch. During the satellite ground debugging stage, the external switch 37 is in a closed state, so that the WiFi communication module 31 obtains continuous power supply; after the debugging is completed, before the satellite is launched, the external switch 37 is disconnected electronically or manually, Therefore, it is ensured that the WiFi communication module 31 will not be accidentally powered on.

In the second embodiment of the present invention, the WiFi communication module 31 can be turned off separately through the external switch 37, and other parts of the on-board communication system 40 except the WiFi antenna 36 and the external switch 37 can still be used after the satellite 200 is put into orbit.

Please refer to FIG. 3 , which shows an installation manner of the on-board communication system 40 on the satellite 200 . In order to show the direction of the satellite 200, the separation device 400 between the satellite 200 and the rocket is drawn in the figure. In this installation mode, the WiFi communication module 31, the microprocessor subsystem 33, the on-board bus interface 35, and the WiFi communication module power supply circuit 34 in the on-board communication system 40 are installed inside the satellite housing 70, so The WiFi antenna 36 and the external switch 37 are installed on the outer surface of the satellite housing 70 , and the connection line 60 connects the external switch 37 and the on-board power system 20 . After the commissioning of each subsystem of the satellite 200 is completed, the onboard power system 20 of the satellite 200 will no longer provide power support to the WiFi communication module 31 . Therefore, the WiFi antenna 36 and the external switch 37 are removed during the installation stage before the satellite is launched, so as to ensure that the WiFi communication module 31 will not be wrongly powered on when the satellite 200 is running in space, so as to ensure the operation of the satellite 200 stability.

Please refer to FIG. 4 , which is a second installation manner of the on-board communication system 30 on the satellite 100 . After satellite 100 lifts off, described WiFi communication module 31 has lost its original value, and described microprocessor subsystem 33 can also be used for carrying out other tasks, and described WiFi communication module 31 and microprocessor subsystem The connecting wires of the interfaces between the systems 33 are usually relatively few. Therefore, in the second installation mode, the WiFi communication module 31 is installed on the outer surface of the satellite housing 70, and the WiFi antenna 36 is connected to the WiFi communication module in the assembly stage before the satellite 100 lifts off. 31 were removed at the same time. Adopting this installation method does not need to increase the external switch 37 and the power supply circuit 34 of the WiFi communication module.

Please refer to FIG. 5 , which shows a third installation mode of the on-board communication system 30 on the satellite 100 . In a specific implementation process, the on-board communication system 30 may be combined with the on-board subsystem set 50 . For example, the on-board communication system 30 can be used as part of the functions of the on-board computer (borrowing the processor and memory of the on-board computer) in the on-board subsystem collection 50, or can be used as a part of the on-board subsystem collection 50. Part of the navigation subsystem (to facilitate connection of RF cables). If the on-board communication system 30 is only used as a channel for ground remote control, telemetry, debugging and software upgrade of the satellite 100, it will no longer have value after the satellite 100 lifts off. The outer surface of the satellite casing 70 is completely dismantled before the satellite 100 is lifted into space.

FIG. 6 is a schematic diagram of simultaneous communication between the subsystems in the satellite subsystem set 50 and multiple host computers with wireless local area network communication functions. In the figure, the upper computers 500, 510, and 520 respectively used by the three developers A, B, and C access the on-board bus 10 and the on-board subsystem set 50 through the on-board communication systems 30, 40. subsystems communicate.

FIG. 7 is a communication message format between the host computer 500 and the on-board communication systems 30 and 40 . In Fig. 7, the upper computers 500, 510, and 520 are respectively used by three developers A, B, and C. It is assumed that these three developers are respectively responsible for debugging subsystems 1, 2, and Subsystem 3. In order to ensure the access security of the on-board bus 10, it should be designed to ensure that developer A can only access subsystem 1 through the on-board bus 10, developer B can only access subsystem 2, and developer C can only access subsystem 3. In order to achieve the above goals, an information exchange format is designed, which is specially used for the information exchange between the upper computer 500 and the microprocessor subsystem 33 in the on-board communication system 30 , 40 . The information exchange format includes: target subsystem identification code F1 and on-board bus access data block F2. The target subsystem identification code F1 is a multi-byte code assigned by the satellites 100 and 200 as a whole, which uniquely identifies a target subsystem, and the three developers A, B, and C only know their own target subsystem identification codes . The on-board bus access data block F2 is used for accessing the on-board bus 10, and generally includes a read-write identifier F20, an access address F21 and an access data F22. The read/write flag F20 is usually 1 bit, indicating read or write. The access address is usually 31 bits, which constitutes 32 bits together with the read/write identifier. Access data F22 is usually multi-byte.

During the ground debugging process, the on-board communication systems 30 and 40 can conveniently realize the communication between the satellites 100 and 200 and any upper computer 500 with wireless local area network communication function. After the satellites 100 and 200 of the present invention are powered on, only one upper computer 500 (usually a notebook computer) with wireless LAN communication function is needed to realize functions such as remote control command, telemetry data collection, debugging and program update . In the process of using the host computer 500 to debug the satellites 100, 200, only the on-board communication systems 30, 40 and the subsystems to be debugged need to participate, without the cooperation of other satellite subsystems. In addition, the on-board communication systems 30 and 40 can also serve as a verification system during the commissioning process of the satellite. For example, when an abnormality occurs in any subsystem of the satellite system, the on-board communication system 30, 40 can be used as a monitoring system to collect data and analyze the cause of the error. This process is not affected by other subsystems in the satellite. Problems and problem solving provide an important approach.

In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should be included within the scope of protection claimed by the present invention.

Claims (10)

1. A satellite that communicates with a host computer through a wireless local area network and accepts control. The satellite includes: a satellite housing, an on-board bus, an on-board power supply system, and a collection of on-board subsystems. The on-board bus and the satellite Each subsystem in the on-board power system and on-star subsystem set is connected; the on-star power system includes an input terminal and an output terminal, the input terminal is used to connect to an external power supply, and the output terminal is used to supply the Each subsystem in the on-board subsystem set supplies power; it is characterized in that the satellite further includes an on-board communication system, and the on-board communication system communicates with the host computer through a wireless local area network during the ground debugging stage before satellite launch, and the above-mentioned The on-board communication system is connected to the on-board bus, and communicates with each subsystem in the on-board subsystem set through the on-board bus. 2. The satellite according to claim 1, wherein the on-board communication system is installed on the outer surface of the satellite casing, and the on-board communication system can be dismantled before the satellite goes into space. 3. The satellite according to claim 1, wherein the on-board subsystem set includes: an on-board computer, an attitude control subsystem, a navigation subsystem and an on-board payload. 4. The satellite as claimed in claim 1, wherein the on-board communication system communicates with a plurality of upper computers simultaneously through a wireless local area network, and each upper computer can only access the on-board computer through the on-board bus. A specific subsystem in a subsystem collection. 5. satellite as claimed in claim 1, is characterized in that, described on-star communication system comprises: WiFi communication module, microprocessor subsystem, WiFi antenna and on-star bus interface, described WiFi communication module and described WiFi The antenna is connected to the microprocessor subsystem, and the WiFi communication module transmits the communication data from the upper computer to the microprocessor subsystem, and transmits the data from the microprocessor subsystem to the microprocessor subsystem. In the upper computer, the microprocessor subsystem is connected to the on-board bus interface, converts the communication data into a format compatible with the on-board bus and sends it to the on-board bus through the on-board bus interface. 6 . The satellite according to claim 5 , wherein the WiFi communication module is a WiFi transparent transmission module that integrates a TCP/IP protocol stack and a WiFi communication driver, and has a high-speed serial interface as its external interface. 7. The satellite as claimed in claim 5, characterized in that, the information exchange format between the microprocessor subsystem and the upper computer with wireless local area network communication function comprises: target subsystem identification code and on-star bus access data block; the target subsystem identification code is a multi-byte code that can uniquely identify a target subsystem in an on-board subsystem set, and the on-board bus access data block is used to access the on-board bus, Including read and write identification, access address and access data. 8 . The satellite according to claim 5 , wherein the WiFi communication module is installed on the outer surface of the satellite casing, and the WiFi communication module can be removed before the satellite lifts off. 9. The satellite according to claim 5, wherein the on-board communication system further comprises: a WiFi communication module power supply circuit and an external switch; the WiFi communication module power supply circuit supplies power for the WiFi communication module, and the The external switch controls the working state of the power supply circuit of the WiFi communication module. 10. The satellite as claimed in claim 9, characterized in that, the WiFi communication module, the microprocessor subsystem, the bus interface on the star, and the WiFi communication module power supply circuit in the on-board communication system are installed inside the satellite housing , the WiFi antenna and the external switch are installed on the outer surface of the satellite housing, and the external switch is connected to the power supply system through a connection line.