CN112202656B - Application method of bus communication protocol for on-orbit adjustable traveling wave tube amplifier - Google Patents
Application method of bus communication protocol for on-orbit adjustable traveling wave tube amplifier Download PDFInfo
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- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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Abstract
A bus communication protocol for an on-orbit adjustable traveling wave tube amplifier aims at the development of on-orbit adjustable traveling wave tube amplifier products, and aims to realize the interaction of remote control and telemetry information of an on-satellite remote control and telemetry unit and on-orbit adjustable traveling wave tube amplifier products, complex remote control and telemetry information in a table 1 is transmitted in a serial control bus mode, a remote control and telemetry interface of each traveling wave tube amplifier product is simplified into 10 serial signal interfaces (comprising 5 main bus signals and 5 standby bus signals), and the interface complexity is greatly reduced; the satellite remote control and remote measurement unit sends related instructions, the Flexible-LTWTA product receives the bus instructions through the external interface, and the instruction analysis and execution are completed according to the bus protocol. One satellite remote control and remote measurement unit can be hung on 31 traveling wave tube amplifier products, and the satellite-borne application requirements are met.
Description
Technical Field
The invention relates to a bus communication protocol for an on-orbit adjustable traveling wave tube amplifier.
Background
In recent years, the space industry in China has been rapidly developed, and from the aspect of satellite payload, the fields of satellite communication repeaters, high-speed data transmission systems, satellite-borne remote sensors and the like have been greatly developed. As an essential component for various satellite applications, various traveling wave tube amplifiers occupy a relatively important position in satellite payloads. The development capability of autonomously developing and developing a space traveling wave tube amplifier in China is improved greatly in the technical level after the development of nearly ten years, the amplifier has the development and stable production capability of a multi-frequency-band full-coverage continuous wave traveling wave tube amplifier at present, and various traveling amplifier products with fixed saturated output power are successfully applied to a plurality of satellite project models in an on-orbit manner.
The space traveling wave tube amplifier is a power consumption unit with the largest payload of the spacecraft, and 80% of the power of the onboard power supply is supplied to the traveling wave tube amplifier. The development of the on-orbit adjustable traveling wave tube amplifier not only can effectively adapt to the change of the task characteristics of the satellite, but also can enhance the flexibility of the manufacturing and system debugging of the traveling wave tube amplifier product and can effectively reduce the power loss. The on-orbit adjustable traveling wave tube amplifier is more suitable for the application requirement of novel satellite loads. In recent years, some foreign manufacturers develop products with adjustable power, and the power is adjusted under the condition that main indexes such as the working efficiency and linearity of the products are guaranteed. At present, adjustable products are not introduced into the domestic satellite system, and the products are taken as next-generation mainstream products of space application which is mainly popularized by foreign manufacturers, are gradually and widely applied in the coming years, and have wide market prospects. Development of products with adjustable on-orbit discharge (Flexible-LTWTA) can improve the front-edge competitiveness of products with discharge in domestic space and meet the development requirements of novel satellite platforms.
The power-adjustable line playing product has complex control function and more remote control and remote measurement interfaces, and the research on the serial bus for the on-orbit adjustable line playing product is a key link for realizing the functions of on-orbit power adjustment, frequency adjustment, multi-gear and multi-mode instruction sending and remote measurement acquisition, thereby adapting to the development requirement of multimedia satellites, reducing the complexity of the whole satellite cable network and enhancing the flexibility of manufacturing and debugging the line playing product.
Early domestic line playing products adopt discrete remote control and remote measurement interfaces, even if double-point backup is not considered, nearly twenty external interfaces are involved in each line playing product, the required number of single-satellite line playing products reaches more than twenty, and a cable network is very complex; the novel flexile-LTWTA product has more advanced control functions such as power gear adjustment, frequency gear adjustment and filament gear adjustment, and relates to nearly thirty external remote control and telemetry interfaces, specifically as shown in table 1 (on-rail adjustable line amplifier remote control and telemetry function):
TABLE 1
The discrete interface adopted by the traditional satellite-borne playing product has the following defects:
under the general condition, the load of a traveling wave tube amplifier is required to be more than 30 paths by one communication satellite, nearly 20 remote control and remote measurement interface resources are required to be distributed to the traveling products of each discrete interface by the whole satellite, the design difficulty and complexity of on-satellite remote control and remote measurement management unit equipment are greatly increased, and the complexity and weight of a whole-satellite cable network are further increased; in addition, in each line playing product, a corresponding interface matching circuit needs to be designed for each discrete remote control and remote measurement signal, which is not beneficial to miniaturization and integration development of the product.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the bus communication protocol for the on-orbit adjustable traveling wave tube amplifier is used for overcoming the defects of the prior art, is developed aiming at the on-orbit adjustable traveling wave tube amplifier product, and aims to realize the interaction of remote control and remote measurement information of an on-satellite remote control and remote measurement unit and an on-orbit adjustable traveling wave tube amplifier product, the complicated remote control and remote measurement information in the table 1 is transmitted in a serial control bus mode, the remote control and remote measurement interface of each traveling wave tube amplifier product is simplified into 10 serial signal interfaces (comprising 5 paths of main bus signals and 5 paths of standby bus signals), and the interface complexity is greatly reduced; the satellite remote control and remote measurement unit sends related instructions, the Flexible-LTWTA product receives the bus instructions through the external interface, and the instruction analysis and execution are completed according to the bus protocol. One satellite remote control and remote measurement unit can be hung on 31 traveling wave tube amplifier products, and the satellite-borne application requirements are met.
The purpose of the invention is realized by the following technical scheme:
a bus communication protocol for an on-orbit adjustable traveling wave tube amplifier is used for serial bus communication between an on-board remote control and remote measurement unit and a terminal adjustable traveling wave tube product;
the bus communication protocol comprises a bus instruction time sequence, a bus instruction protocol, a bus telemetering time sequence and a bus telemetering protocol;
the bus instruction sequence is used for controlling telemetry data transmission and instruction data transmission;
the bus instruction protocol is used for controlling the on-satellite remote control and remote measurement unit to send instruction data to all the terminal adjustable line playing products hung on the bus in a broadcasting mode;
the bus telemetry timing is used to control the timing of telemetry data transmission;
the bus telemetry protocol is used for controlling the on-board remote control telemetry unit to send telemetry request command data to all terminal adjustable line playing products hung on the bus in a broadcasting mode and receiving telemetry data returned by the terminal adjustable line playing products.
Preferably, the bus command timing sequence relates to a telemetering gate control signal, a command gate control signal, a clock signal and command data which are 4 paths of signals in total, the telemetering gate control signal is kept at a low level in the bus command timing sequence time, when the bus needs to transmit the command data, the command gate control signal is changed from the low level to a high level, the command gate control signal is kept at the high level during the transmission period of the bus command data, and the command gate control signal is changed to the low level after the transmission of the bus data is finished.
Preferably, the bus instruction protocol is used for controlling the satellite remote control and telemetry unit to send instruction data with the length of 24 bits to all terminal adjustable traveling wave tube products hung on the bus in a broadcasting manner; the instruction data at least comprises target address information, instruction type, instruction data content and checksum.
Preferably, the terminal adjustable traveling wave tube amplifier is in a monitoring state after being powered on, and is in an active state when command data sent by the on-board remote control and remote measurement unit is identified; after receiving complete instruction data, the terminal can adjust the playing product to verify the checksum data, automatically discard the instruction data if the checksum is wrong, and store the wrong information in the self telemetering parameters; if the verification is passed, the terminal adjustable line playing product verifies target instruction address information in the instruction, if the target instruction address information is not matched with the current terminal adjustable line playing product, the terminal adjustable line playing product automatically discards the instruction data, and if the target instruction address information is matched with the current terminal adjustable line playing product and the current instruction is a non-telemetering request instruction, the current terminal adjustable line playing product executes the instruction data.
Preferably, the bus telemetering time sequence relates to 4 paths of signals including a telemetering gate control signal, a command gate control signal, a clock signal and telemetering data;
the command gating signal is kept at a low level in the bus telemetry time sequence, when telemetry data need to be transmitted on a bus, the telemetry gating signal is changed from the low level to the high level, the bus telemetry time sequence totally comprises 2 pieces of 24-bit data transmission, after the current 24-bit data transmission is finished, the telemetry gating signal is changed from the high level to the low level, and when the 24-bit data need to be transmitted, the telemetry gating signal is changed from the low level to the high level again.
Preferably, the bus telemetry protocol is initiated by an on-board remote control telemetry unit, and the on-board remote control telemetry unit transmits 24-bit remote control request instruction data to all terminal adjustable traveling wave tube products in a broadcasting manner; after the on-satellite remote-control and remote-measurement unit sends the 24-bit remote-measurement request instruction data, the on-satellite remote-control and remote-measurement unit immediately outputs a bus remote-measurement time sequence and starts to wait for the remote-measurement data returned by the adjustable line-playing product of the receiving terminal.
Preferably, the terminal-adjustable line playing product firstly verifies the 24-bit telemetering request instruction data sent by the bus control end, when the checksum and the target instruction address information are verified, the terminal-adjustable line playing product verifies the instruction type information, if the current request telemetering instruction is the request telemetering instruction, the terminal-adjustable line playing product sends the corresponding telemetering data to the on-satellite remote control telemetering unit according to the defined instruction data content, and the telemetering data sent by the terminal-adjustable line playing product every time is two 24-bit telemetering data words.
A bus for an on-orbit adjustable traveling wave tube amplifier adopts the bus communication protocol for the on-orbit adjustable traveling wave tube amplifier.
The bus for the on-orbit adjustable traveling wave tube amplifier preferably comprises a bus control end, a bus terminal and a bus cable; the bus control end is connected with a bus terminal through a bus cable, and the bus terminal is a terminal adjustable line playing product; the bus control end is an on-satellite remote control and remote measurement unit; the bus cable comprises a control line, a telemetry line and a deconcentrator, wherein the control line and the telemetry line are physically isolated.
The bus for the on-orbit adjustable traveling-wave tube amplifier preferably has a transmission rate of 1KHz to 16.7 KHz.
Compared with the prior art, the invention has the following beneficial effects:
(1) the FSB bus is used as a satellite secondary control bus, has the characteristics of resource saving, low cost, clear authority, clear scheduling, strong anti-interference capability, high reliability, wide adaptability, universal and simple physical transmission link design and the like, and is particularly suitable for space application. The bus can effectively reduce the system complexity, realize the miniaturization and low cost of products and completely realize the complex multifunctional parameter regulation requirement of the products. Meanwhile, the FSB bus protocol has good portability and expandability, and the implementation mode has high flexibility;
(2) portability:
firstly, the bus protocol can fully cover the control function of a domestic space traveling wave tube amplifier, and can be widely applied to various types of space traveling wave tube amplifier products with various frequency bands and various powers besides a Flexible-LTWTA product; meanwhile, the bus is also very suitable for other satellite-borne power amplifier products (such as solid-state power amplifiers) and microwave active products with large dynamic gain adjustment requirements, the products can be directly transplanted and applied with an FSB bus network architecture, interface circuits do not need to be changed, and the application can be realized only by adaptively modifying specific contents of communication protocol code word definitions. The good transportability of the bus realizes the maximization of the application range of the product;
(3) and (3) expandability:
in the FSB bus communication protocol, 13 instruction types are used at present, and the instruction types can be expanded into 32 instruction types in the future according to the improvement of product function requirements, the expansion of application range and the like, so that various requirements in the future are covered; in addition, the instruction data content of various modes at present can not only cover the existing functions, but also support the code word extension definition, gear extension, function extension, parameter extension and the like, and the modification is very simple, convenient and flexible;
(4) flexibility is realized:
the FSB bus communication protocol can be realized by various core control chips, such as FPGA, DSP, ASIC and the like, the resource occupancy rate is low, and the realization mode has high flexibility.
Drawings
Fig. 1 is a block diagram of the FSB bus.
FIG. 2 is a timing diagram of an FSB bus instruction.
FIG. 3 is a schematic diagram of an FSB bus telemetry timing sequence.
FIG. 4 is a diagram showing the effect of the FSB bus remote control command.
FIG. 5 is a diagram of the effects of FSB bus telemetry acquisition.
Fig. 6 is a line playing product applying the FSB bus protocol.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A bus communication protocol for an on-orbit adjustable traveling wave tube amplifier is used for serial bus communication between an on-board remote control and remote measurement unit and a terminal adjustable traveling wave tube product;
the bus communication protocol comprises a bus instruction time sequence, a bus instruction protocol, a bus telemetering time sequence and a bus telemetering protocol;
the bus instruction sequence is used for controlling telemetry data transmission and instruction data transmission;
the bus instruction protocol is used for controlling the on-satellite remote control and remote measurement unit to send instruction data to all the terminal adjustable line playing products hung on the bus in a broadcasting mode;
the bus telemetry timing is used to control the timing of telemetry data transmission;
the bus telemetry protocol is used for controlling the on-board remote control telemetry unit to send telemetry request command data to all terminal adjustable line playing products hung on the bus in a broadcasting mode and receiving telemetry data returned by the terminal adjustable line playing products.
As a preferred embodiment of the present invention, the bus instruction timing sequence includes 4 paths of signals, namely, a telemetry gate signal, an instruction gate signal, a clock signal, and instruction data, the telemetry gate signal is kept at a low level during a bus instruction timing sequence time, the instruction gate signal changes from a low level to a high level when the bus needs to transmit the instruction data, the instruction gate signal is kept at a high level during the bus instruction data transmission period, and the instruction gate signal changes to a low level after the bus data transmission is completed.
As a preferred scheme of the invention, the bus instruction protocol is used for controlling the satellite remote control and telemetry unit to send instruction data with the length of 24 bits to all the terminal adjustable line playing products hung on the bus in a broadcasting mode; the instruction data at least comprises target address information, instruction type, instruction data content and checksum. The terminal adjustable line playing product is in a monitoring state after being electrified, and is in an active state when command data sent by the on-board remote control and remote measurement unit is identified; after receiving complete instruction data, the terminal can adjust the playing product to verify the checksum data, automatically discard the instruction data if the checksum is wrong, and store the wrong information in the self telemetering parameters; if the verification is passed, the terminal adjustable line playing product verifies target instruction address information in the instruction, if the target instruction address information is not matched with the current terminal adjustable line playing product, the terminal adjustable line playing product automatically discards the instruction data, and if the target instruction address information is matched with the current terminal adjustable line playing product and the current instruction is a non-telemetering request instruction, the current terminal adjustable line playing product executes the instruction data.
As a preferred scheme of the invention, the bus telemetering time sequence relates to 4 paths of signals including telemetering gating signals, instruction gating signals, clock signals and telemetering data; the command gating signal is kept at a low level in the bus telemetry time sequence, when telemetry data need to be transmitted on a bus, the telemetry gating signal is changed from the low level to the high level, the bus telemetry time sequence totally comprises 2 pieces of 24-bit data transmission, after the current 24-bit data transmission is finished, the telemetry gating signal is changed from the high level to the low level, and when the 24-bit data need to be transmitted, the telemetry gating signal is changed from the low level to the high level again.
As a preferred scheme of the invention, the bus telemetering protocol is firstly initiated by an on-board remote telemetering unit, and the on-board remote telemetering unit transmits 24-bit telemetering request instruction data to all terminal adjustable line playing products in a broadcasting mode; after the on-satellite remote-control and remote-measurement unit sends the 24-bit remote-measurement request instruction data, the on-satellite remote-control and remote-measurement unit immediately outputs a bus remote-measurement time sequence and starts to wait for the remote-measurement data returned by the adjustable line-playing product of the receiving terminal.
As a preferred scheme of the invention, a terminal adjustable line playing product firstly verifies 24-bit telemetering request instruction data sent by a bus control end, when a checksum and target instruction address information are verified, the terminal adjustable line playing product verifies instruction type information, if the current request telemetering instruction is the request telemetering instruction, the terminal adjustable line playing product sends corresponding telemetering data to an on-satellite remote telemetering unit according to defined instruction data content, and the telemetering data sent by the terminal adjustable line playing product each time is two 24-bit telemetering data words.
A bus for an on-orbit adjustable traveling wave tube amplifier adopts the bus communication protocol for the on-orbit adjustable traveling wave tube amplifier. The system comprises a bus control end, a bus terminal and a bus cable; the bus control end is connected with a bus terminal through a bus cable, and the bus terminal is a terminal adjustable line playing product; the bus control end is an on-satellite remote control and remote measurement unit; the bus cable comprises a control line, a telemetry line and a deconcentrator, wherein the control line and the telemetry line are physically isolated. The transmission rate of the bus is 1KHz to 16.7 KHz.
Example (b):
FSB bus network architecture-reducing complexity, implementing miniaturization and low cost
The on-orbit adjustable horizontal amplifier product has complex control function and more remote control and remote measurement interfaces, develops an FSB (frequency selective bus) suitable for the satellite-borne amplifier product, realizes the on-orbit power adjustable multi-gear instruction sending and remote measurement acquisition functions, can meet the development requirement of a multimedia satellite, reduces the complexity of a whole satellite cable network, enhances the manufacturing and debugging flexibility of the horizontal amplifier product, and realizes the miniaturization design of the product. In addition, the interface circuits of the bus controller end and the bus terminal are designed by common components and interface circuits, the complexity of the interface circuits is low, the components have strong universality, are easy to select and low in price, a special bus interface chip is not needed, the design is greatly simplified, and the cost is reduced.
The FSB bus is a serial bus for external communication of on-orbit adjustable running playing products, is used for transmitting remote control and remote measurement information, has low data throughput, can be used as a secondary data bus of a satellite platform, provides measurement and control data transmission service for satellite platform equipment, namely an on-satellite remote control and remote measurement management unit (bus control end) and an on-orbit adjustable traveling wave tube amplifier (bus terminal), and realizes effective communication between the on-satellite remote control and remote measurement management unit and the on-orbit adjustable running playing products.
The line playing product receives a serial remote control command sent by the on-satellite remote control and remote measurement management unit through the FSB bus, a control circuit in the product realizes the analysis and specific execution of the remote control command, packs corresponding remote measurement information according to the command requirement, uploads the remote measurement information to the FSB bus and returns the remote control and remote measurement management unit on the satellite. The FSB bus is composed of three parts, namely, a bus control end, a bus terminal and a bus cable, as shown in fig. 1.
The FSB bus master (or backup) contains five signals, which are defined as follows:
a) clock signal (F _ CLK): a bus clock (shared for transmission and reception) outputted from a bus control terminal;
b) command gating signal (F _ SCMD): the signal is output by the bus control end, and when the bus control end outputs serial command data, the signal is in a high level;
c) telemetry gating signal (F _ SACQ): the signal is output by a bus control end, and when the bus control end reads telemetering data from a terminal (RT), the signal is in a high level;
d) instruction data (F _ CDATA): the serial command data is output by the bus control end, and the bus control end outputs the serial command data from the port;
e) telemetry data (F _ TDATA): and the serial telemetry data is output by the accessed terminal, and the current accessed terminal outputs the serial telemetry data from the port.
The bus control end is the main control end of the FSB bus, and the triggering of all behaviors on the bus is initiated by the bus control end. For the master (or backup) of the bus control end, the output signals are 4 paths: f _ CLK, F _ SCMD, F _ SACQ, F _ CDATA; the input signal is F _ TDATA. The bus control end is divided into a logic control circuit and a bus interface circuit, the logic control circuit is used for realizing a bus communication protocol, and the interface circuit is mainly used for realizing driving, matching, sending and receiving of bus level signals.
The bus terminals are service nodes on the FSB bus, each bus terminal corresponds to a unique physical address, and the terminal address range is 1-31. For the master (or backup) of the bus terminal, the input signals are 4 paths: f _ CLK, F _ SCMD, F _ SACQ and F _ CDATA, and the output signal is F _ TDATA. The bus terminal is divided into a logic control circuit and a bus interface circuit, the logic control circuit is used for realizing a bus communication protocol, and the interface circuit is used for realizing the driving and matching of bus level signals.
The bus cable is used for realizing the physical connection between the bus control end and each bus terminal and realizing the interconnection of the ground network of each device of the bus; the bus cable provides shielding protection for bus signal transmission. The deconcentrator is an important component of the bus cable and is used for realizing one-to-many direct current coupling conversion of bus physical signals.
The FSB bus network architecture is characterized in that:
a) the bus type: the system comprises a half-duplex bus, a data acquisition and processing unit and a data processing unit, wherein the command data and the telemetering data are transmitted independently, and only one of the command data and the telemetering data can be transmitted on the bus at the same time;
b) the bus communication mechanism is as follows: the response mode is adopted, each communication behavior of the bus is initiated by the bus control end, the terminal equipment does not have the authority of autonomously sending a request command to the bus control end, and the terminal equipment distinguishes the validity of the instruction data only according to the target address information in the instruction data;
c) the bus communication mode is as follows: synchronous communication, wherein a bus comprises a clock signal (F _ CLK), and the interconnected devices are synchronized through a uniform clock to complete information interaction, so that the two communication parties have a completely consistent timing relationship when sending and receiving data;
d) bus redundancy: the bus control end, the bus cable and the bus terminal are all designed with redundant backups, the bus control end and the bus terminal are both provided with A, B two-path bus interfaces and are connected to a master bus and a backup of the FSB bus, the master bus and the backup bus work in a hot standby mode, the master bus and the backup bus cannot work in work at the same time, and only one bus can work in work at the same time;
the FSB bus is specially designed for special space-oriented specific requirements, the characteristics are particularly suitable for on-satellite remote control and remote measurement data transmission, and the advantages are as follows:
a) the on-board remote control and remote measurement unit is used as a main control end to control each terminal (line playing product) to execute a command or return remote measurement, and a control line and a remote measurement line are physically isolated in the transmission process, so that the possibility of collision of reverse signals on a bus is eliminated;
b) the on-board remote control and remote measurement unit has the highest control and scheduling authority, and products played by each terminal cannot actively transmit data to the bus, so that the possibility that a plurality of terminals hung on the bus play data and upload the data to the bus at the same time is greatly reduced, the on-board remote control and remote measurement unit is favorable for clear task and data integration, and the reliability of system application is enhanced;
c) the FSB bus adopts a bus synchronous communication mode containing a channel associated clock, the processing is simple and convenient, the cost is low, the anti-jamming capability is strong, the bus control end can adjust the transmission rate (1 KHz-16.7 KHz) at any time according to the on-satellite application requirement, the bus terminal does not need to identify through a handshaking signal, does not need to set or adjust parameters, can directly adapt to the change of the transmission rate, the bus transmission efficiency is high, and the flexibility and the adaptability of the system application are greatly enhanced;
d) the FSB bus is divided into a main bus and a backup bus, so that the reliability of on-satellite serial bus transmission is improved, hot switching can be realized in the process of executing the whole satellite task, and the bus can be switched to another interface when any interface of the main interface and the backup interface breaks down, so that the normal transmission of satellite data is not influenced.
FSB bus communication protocol-implementation of complex multi-function parameter adjustments
The FSB bus communication protocol covers all functions of the on-orbit adjustable traveling wave tube amplifier, the definition of a protocol code word is clear and perfect, the complex multifunctional parameter adjusting function of a product is realized, and the application requirements of satellite type items are met; the FSB bus communication protocol has strong portability and expandability and flexible code word modification, can be popularized to other satellite-borne power amplifier products or microwave active products with large dynamic gain adjustment requirements, and can further expand the requirements of future updating, more complex and more complete function application.
FSB bus instruction timing: the FSB instruction timing relates to 4 paths of signals including a telemetering gating signal, an instruction gating signal, a clock signal and instruction data. The telemetering gate control signal is kept at a low level during the bus command timing, the command gate control signal changes from a low level to a high level when command data needs to be transmitted on the bus, the command gate control signal is kept at a high level during the bus command data transmission period, and the command gate control signal changes to a low level after the bus data transmission is finished, as shown in fig. 2.
FSB bus instruction protocol: the on-board remote control and telemetry unit sends instruction data with the length of 24 bits to all the flexile-LTWTA products hung on the bus in a broadcasting mode, and the instruction content comprises the following steps: target address information, instruction type, instruction data content, checksum, etc., as shown in table 2(FSB command word definition).
TABLE 2
The Flexible-LTWTA product is in an interception state after being electrified, and is in an active state when command data sent by the on-board remote control and telemetry unit is identified. After receiving the complete instruction data, the bus terminal firstly verifies the checksum data, if the checksum is wrong, the instruction data is automatically discarded, and error information is stored in corresponding telemetry parameters of the bus terminal. If the verification is passed, the bus terminal verifies the target instruction address information in the instruction, if the target instruction address information is not matched with the current terminal equipment, the terminal equipment automatically discards the instruction data, and if the target instruction address information is matched with the current terminal and the current instruction is a non-telemetering request instruction, the current terminal executes corresponding instruction data.
FSB bus telemetry timing: the FSB telemetry timing relates to 4 paths of signals including a telemetry gating signal, a command gating signal, a clock signal and telemetry data. The command gating signal is kept at a low level in the bus telemetry time sequence, when telemetry data needs to be transmitted on the bus, the telemetry gating signal is changed from the low level to the high level, the bus telemetry time sequence totally comprises the transmission of 2 pieces of 24-bit data, after the transmission of the current 24 bits is finished, the telemetry gating signal is changed from the high level to the low level, and when the 24-bit data needs to be transmitted, the telemetry gating signal is changed from the low level to the high level again, as shown in fig. 3.
FSB bus telemetry protocol: the bus telemetry process is initiated by an on-board remote telemetry unit, and the on-board remote telemetry unit transmits 24bit telemetry request instruction data to all flexile-LTWTA products in a broadcasting mode. The telemetry return data comprises 4 telemetry data WORDs from WORD1 to WORD4, and the correspondence between the telemetry data indicator WORD and the telemetry data WORD in the telemetry request command (when the command type is 00000) is shown in table 3. After the on-board remote-control and remote-measurement unit sends the 24-bit remote-measurement request instruction data, the on-board remote-control and remote-measurement unit immediately outputs a remote-measurement time sequence and starts to wait for receiving the remote-measurement data returned by the flexile-LTWTA product.
TABLE 3
The method comprises the steps that a Flexible-LTWTA product firstly verifies 24-bit telemetering request instruction data sent by a bus control end, when a checksum and target instruction address information are verified to pass, the bus terminal verifies instruction type information, if the instruction type information is a request telemetering instruction at present, the Flexible-LTWTA product sends corresponding telemetering data to an on-satellite remote telemetering unit according to defined instruction data content, and the telemetering data sent by the Flexible-LTWTA product every time is two 24-bit telemetering data words, as shown in a table 4 (telemetering data word definition).
TABLE 4
FIG. 4 shows a display interface of the FSB bus controller (the FSB bus controller is a ground detection device simulating the FSB function of the remote control and telemetry unit on the satellite) sending a remote control command to the Flexible-LTWTA product; FIG. 5 shows a telemetry display interface of an implemented Flexible-LTWTA product back to the FSB bus controller side; FIG. 6 is a photograph of a Flexible-LTWTA product implemented using the FSB bus communication protocol.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (6)
1. A method for using a bus communication protocol for an on-orbit adjustable traveling wave tube amplifier is characterized by being used for serial bus communication between an on-board remote control and remote measurement unit and a terminal adjustable traveling wave tube product;
the bus communication protocol comprises a bus instruction time sequence, a bus instruction protocol, a bus telemetering time sequence and a bus telemetering protocol;
the bus instruction sequence is used for controlling telemetry data transmission and instruction data transmission;
the bus instruction protocol is used for controlling the on-satellite remote control and remote measurement unit to send instruction data to all the terminal adjustable line playing products hung on the bus in a broadcasting mode;
the bus telemetry timing is used to control the timing of telemetry data transmission;
the bus telemetry protocol is used for controlling the on-board remote control telemetry unit to send telemetry request instruction data to all terminal adjustable line playing products hung on the bus in a broadcasting mode and receiving telemetry data returned by the terminal adjustable line playing products;
the bus instruction time sequence relates to a telemetering gate control signal, an instruction gate control signal, a clock signal and instruction data which are 4 paths of signals, the telemetering gate control signal is kept at a low level in the bus instruction time sequence, when the instruction data are required to be transmitted on a bus, the instruction gate control signal is changed from the low level to a high level, the instruction gate control signal is maintained at the high level during the transmission period of the bus instruction data, and the instruction gate control signal is changed to the low level after the transmission of the bus data is finished;
the bus instruction protocol is used for controlling the on-satellite remote control and telemetry unit to send instruction data with the length of 24 bits to all the terminal adjustable line playing products hung on the bus in a broadcasting mode; the instruction data at least comprises target address information, instruction types, instruction data contents and checksums;
the bus telemetering time sequence relates to 4 paths of signals including telemetering gating signals, instruction gating signals, clock signals and telemetering data;
the command gating signal is kept at a low level in the bus telemetry time sequence, when telemetry data need to be transmitted on a bus, the telemetry gating signal is changed from the low level to the high level, the bus telemetry time sequence totally comprises the transmission of 2 pieces of 24-bit data, after the transmission of the current 24 bits is finished, the telemetry gating signal is changed from the high level to the low level, and when the 24-bit data need to be transmitted, the telemetry gating signal is changed from the low level to the high level again;
the bus telemetry protocol is initiated by an on-board remote control and telemetry unit, and the on-board remote control and telemetry unit transmits 24bit telemetry request instruction data to all terminal adjustable line playing products in a broadcasting mode; after the on-satellite remote-control and remote-measurement unit sends the 24-bit remote-measurement request instruction data, the on-satellite remote-control and remote-measurement unit immediately outputs a bus remote-measurement time sequence and starts to wait for the remote-measurement data returned by the adjustable line-playing product of the receiving terminal.
2. The method for using the bus communication protocol for the on-orbit adjustable traveling-wave tube amplifier is characterized in that the terminal adjustable traveling-wave tube amplifier is in a listening state after being powered on, and is in an active state when command data sent by an on-board remote control and telemetry unit is recognized; after receiving complete instruction data, the terminal can adjust the playing product to verify the checksum data, automatically discard the instruction data if the checksum is wrong, and store the wrong information in the self telemetering parameters; if the verification is passed, the terminal adjustable line playing product verifies target instruction address information in the instruction, if the target instruction address information is not matched with the current terminal adjustable line playing product, the terminal adjustable line playing product automatically discards the instruction data, and if the target instruction address information is matched with the current terminal adjustable line playing product and the current instruction is a non-telemetering request instruction, the current terminal adjustable line playing product executes the instruction data.
3. The method for using the bus communication protocol for the on-orbit adjustable traveling-wave tube amplifier, according to claim 1, is characterized in that a terminal adjustable traveling-wave tube product firstly verifies 24-bit telemetering request command data sent by a bus control end, when a checksum and target command address information are verified, the terminal adjustable traveling-wave tube product verifies command type information, if the command type information is a request telemetering command at present, the terminal adjustable traveling-wave tube product sends corresponding telemetering data to an on-satellite remote telemetering unit according to defined command data content, and the telemetering data sent by the terminal adjustable traveling-wave tube product each time is two 24-bit telemetering data words.
4. A bus for an on-orbit adjustable traveling wave tube amplifier, which is characterized by adopting the use method of the bus communication protocol of any one of claims 1 to 3.
5. The bus for the on-orbit adjustable traveling-wave tube amplifier as claimed in claim 4, which comprises a bus control end, a bus terminal and a bus cable; the bus control end is connected with a bus terminal through a bus cable, and the bus terminal is a terminal adjustable line playing product; the bus control end is an on-satellite remote control and remote measurement unit; the bus cable comprises a control line, a telemetry line and a deconcentrator, wherein the control line and the telemetry line are physically isolated.
6. The bus for the on-orbit adjustable traveling-wave tube amplifier as claimed in claim 4, wherein the transmission rate of the bus is 1KHz to 16.7 KHz.
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