CN101770541A - Satellite data system simulation platform based on AOS standards - Google Patents
Satellite data system simulation platform based on AOS standards Download PDFInfo
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Abstract
The invention discloses a satellite data system simulation platform based on AOS standards, which consists of a database, database system simulation software and an external data injecting and receiving environment, wherein the output of the external data injecting and receiving environment is connected to the database system simulation software through an Ethernet; SQL query sentences output by the simulation software are connected to the database; the database returns query results to the database system simulation software; and telemetry data and transmitted data output by the simulation software are connected to the external data injecting and receiving environment. The data system simulation system consists of a remote control command injecting module, a simulation initialization and parameter configuring module, a data managing module and a simulation state displaying module, wherein the outputs of the remote control command injecting module and the simulation initialization and parameter configuring module are connected to the data managing module; and the output of the data managing module is connected to the simulation state display module. The simulation platform of the invention can simulate the processing procedure of satellite remote control commands and the effects on the parameters and the operating states in real time, realizes the telemetering and downloading strategy of secondary dispatching and realizes the function of on-satellite data management.
Description
(1) technical field
The present invention relates to a kind of system simulation platform, relate in particular to a kind of satellite data system emulation platform, belong to satellite data system emulation field based on the AOS standard.
(2) background technology
In order to adapt to the demand of space technology development, CCSDS (the space technology council) has formulated and has been applicable to the senior to rail system (being called for short AOS) of middle and high data rate spacecraft.In repeater satellite abroad, space station, the manned spacecraft, mostly adopted the AOS standard at present.
The advantage of AOS mainly is:
Conventional P CM remote measurement system adopts frame multiplexing, in case frame structure determines that the data down transmission cycle just can't change, and higher level service is had significant limitation; AOS adopts pseudo channel (being called for short VC) He Yuanbao (being called for short PK) second-level dispatching strategy, and dirigibility is strong, the channel utilization height;
The transmission of China's spacecraft high-speed data at present need take a radio-frequency channel separately, and AOS closes all data in Lu Zaiyi the data stream by scheduling strategy, adopts a radio-frequency channel, has simplified equipment;
The at present domestic main emulation of satellite simulator that is used to fly to control rehearsal be traditional measuring and control data system.No matter and from technical standpoint, still from the angle of international co-operation, information sharing, the spacecraft measuring and control data system of Future in China all presses for the AOS standard that adopts.Therefore, it is significant to design a kind of data system emulation platform of AOS standard.
(3) summary of the invention
1, purpose: the purpose of this invention is to provide a kind of satellite data system emulation platform based on the AOS standard, it has overcome the deficiencies in the prior art, processing procedure that can the real time modelling satellite remote command and to the influence of parameter and running status, the remote measurement that realizes second-level dispatching passes strategy down, and realizes data management function on the star.
2, summary of the invention: as shown in Figure 1, a kind of satellite data system emulation platform of the present invention based on the AOS standard, total system comprises 3 parts: 1, database 10, storage PK parameter name and position, the telemetry parameter of storage telecommand correspondence changes; 2, data system simulation software 20 finishes the copying based on the satellite data management system of AOS standard; 3, external data is injected and reception environment 40, and the data of injection to data system simulation software 20 are provided, and receives the remote measurement of its output and transmit data.Interconnected relationship between them is: external data is injected and the output of reception environment 40 is connected to data system simulation software 20 by Ethernet 30, the SQL query statement of data system simulation software 20 outputs is connected to database 10, database 10 returns to data system simulation software 20 with Query Result, and the telemetry of data system simulation software 20 outputs and forwarding data are connected to external data and inject and reception environment 40.
Described database 10 adopts Microsoft SQL Server2000 to realize.Data system simulation software 20 conducts interviews to database by the SQL statement under the Visual C++6.0 environment.
Described data system simulation software 20, and external data is injected and reception environment 40 between carry out data interaction by Ethernet 30.Used procotol is the point-to-point and UDP multicast of UDP.
This data system simulation software 20 is made up of 4 parts: telecommand injection module 11, simulation initialisation and parameter configuration module 21, data management module 31 and simulation status display module 41.Wherein, telecommand injection module 11, simulation initialisation and parameter configuration module 21, simulation status display module 41 are periphery, are the interfaces of user's operational simulation software; Data management module 31 is the core, finishes the data system copying.Interconnected relationship between this 4 part is: the output of telecommand injection module 11 and simulation initialisation and parameter configuration module 21 all is connected to data management module 31, and the output of data management module 31 is connected to simulation status display module 41.
This telecommand injection module 11 is passed to the upstream data pretreatment module with the user from the telecommand that this machine injects with the coded instructions form, is implemented under the situation that does not have external command to inject and still can finishes copying.
Described telecommand injection module 11 is supported by Visual C++ 6.0 software programming platforms, in conjunction with configuration file and codes table file, has realized that direct instruction and part have the transmission of the indirect instruction of instruction number, and process flow diagram as shown in Figure 4.At first need the user to select to send common direct instruction or indirect instruction, if send direct instruction then input instruction form, instruction number and PN sign indicating number, find the instruction word of order format correspondence, the 15 bytes comparison sign indicating number that inquiry direct instruction code table finds the instruction correspondence according to institute's input information query configuration file, according to the definition of order format each several part is inserted the relevant position respectively then, gather into a complete direct instruction, successively send instruction and carry out pulse width by udp protocol; If send indirect instruction then input instruction number, indirect instruction number and PN sign indicating number, find the instruction word of order format correspondence, the 15 bytes comparison sign indicating number that inquiry direct instruction code table finds the indirect instruction correspondence according to institute's input information query configuration file, and inquiry indirect instruction code table finds the order code of indirect instruction correspondence, according to the definition of order format each several part is inserted the relevant position respectively then, gather into a complete indirect instruction, send instruction by udp protocol.
This simulation initialisation and parameter configuration module 21 are passed to correlation module with the user by the initial parameter value of binary file, configuration file appointment and are carried out initialization, and start emulation.Binary file is the initial value of each PK parameter; Configuration file content has two kinds, and a kind of is parameter configuration, as satellite address code, order format lead code, network parameter etc.; Another kind is the telecommand code table, stores 15 bytes comparison sign indicating number and corresponding instruction number.
Described simulation initialisation and parameter configuration module 21 are supported by Visual C++ 6.0 software programming platforms, and process flow diagram as shown in Figure 5.At first carry out the database access initialization, read configuration file, codes table file, source bag initial value file then, and carry out the initialization of each PK and VC, prepare for remote measurement passes down.Create associated documents at last,, and start emulation as journal file, remote measurement storage file etc.
This simulation status display module 41 is realized two functions: real-time parameter shows and parameter modification.The real-time parameter Presentation Function receives the data of transmission module 52 under the remote measurement, shows the current telemetry frame source code of biography down, and the important parameter that can reflect the simulation process state shows after translating into physical significance; Receive the data of telecommand processing module 22, the time of reception of display remoting instruction, instruction number and disposition.The parameter modification function offers the user revises the PK parameter value in simulation process interface, the parameter name and the currency that in list box, show certain all parameter of PK of selecting by the user, click certain parameter name, the new value of input in " modification value " hurdle, point " is determined " to finish modification.After this this parameter is descended to pass with amended value.
Described simulation status display module 41 is supported by Visual C++ 6.0 software programming platforms, mainly uses the demonstration that list control and edit box control are realized data.
This data management module 31 comprises 5 submodules: transmission module 52 under upstream data pretreatment module 12, telecommand processing module 22, simulation process control module 32, telemetry maintenance module 42, the remote measurement.Interconnected relationship between them is: the output of upstream data pretreatment module 12 is connected to telecommand processing module 22, the output of telecommand processing module 22 is connected to simulation process control module 32, and the output that the output of simulation process control module 32 is connected to telemetry maintenance module 42, telemetry maintenance module 42 is connected to transmission module 52 under the remote measurement.
12 pairs of all upstream datas of this upstream data pretreatment module are classified, are handled.Upstream data has five kinds: telecommand frame, execution pulse width, interruption second network time, the departure time and orbital tracking.
Described upstream data pretreatment module 12 is supported by Visual C++ 6.0 software programming platforms, and process flow diagram as shown in Figure 6.At first classify according to information type, telecommand frame and execution pulse width are passed to telecommand processing module 22 and are carried out subsequent treatment; Receive and interrupt then revising this machine time second network time, be consistent with the central site network time; The departure time and orbital tracking do not process, and directly are transmitted to external data and inject and reception environment 40.
The telecommand frame of 22 pairs of upstream data pretreatment module of this telecommand processing module, 12 outputs and execution pulse width are handled, and finish checking, decoding and execution to instruction.Telecommand is divided into two kinds of direct instruction and indirect instructions, and the instruction class under direct instruction and the traditional measuring and control data system seemingly has complete issuing an order the cycle, i.e. the telecommand frame---and carry out pulse width, realize star ground space-ground closed loop comparison.And indirect instruction is the instruction bag that comprises at the number pipe instruction of AOS data management function, and according to the length of number pipe instruction, an indirect instruction can comprise the instruction of many number pipes, and the instruction of a number pipe can subpackage be many indirect instructions also.Indirect instruction has only the telecommand frame, does not carry out pulse width, but can enable the following biography of space-ground closed loop comparison PK by space-ground closed loop comparison zone bit in the instruction top guide is set, and after the ground comparison was correct, the execution command that sends again in the indirect instruction was carried out.
Described module 22 is supported by Visual C++ 6.0 software programming platforms, to the processing flow chart of telecommand frame as shown in Figure 7.The idiographic flow step is as follows:
1. checking synchronous code.If mistake is leapt to step 12;
2. checking lead code.If lead code is correct, leap to step 4; If mistake continues;
3. verify special lead code.If mistake is leapt to step 12;
4. checking address code.If mistake is leapt to step 12;
5. verify the PN sign indicating number.If mistake is leapt to step 12;
6. extract 15 bytes comparison sign indicating number, whether the inquiry code table has corresponding instruction number.If have, leap to step 9, if do not have, continue;
7. judge whether to be proportional command.If, continue, if not, leap to step 12;
8. withdrawal ratio word;
9. place the state of translating, and call simulation status display module 41 and show;
10. judge whether to be indirect instruction.If, call indirect instruction processing module 13, if not, continue;
11. etc. pending pulse width;
12. finish;
Receive the execution pulse width, the telemetry parameter of command adapted thereto correspondence changes and execution in the Query Database 10, and the instruction process state transfers stationary state to by the state of translating, and waits for next bar telecommand.For the instruction relevant with operational mode, the operational mode maintenance module 53 that also need call in the simulation process control module 32 carries out the state change.
This simulation process control module 32 receives the instruction execution result of telecommand processing module 22 outputs, and instruction is further handled to part.As shown in Figure 2, it comprises 5 submodules: indirect instruction processing module 13, markers command process module 23, delayed telemetry processing module 33, time management module 43 and operational mode maintenance module 53.Interconnected relationship between them is: the output of indirect instruction processing module 13 is connected to markers command process module 23, delayed telemetry processing module 33, time management module 43, select the corresponding subsequent processing module according to different output, the input of operational mode maintenance module 53 is provided by telecommand processing module 22.
Number pipe instruction is wherein extracted in the indirect instruction that this indirect instruction processing module 13 is handled in telecommands, splices, classification, verification, is supported by Visual C++ 6.0 software programming platforms.The instruction of number pipe can be divided into remote measurement dependent instruction, housekeeping instruction, instruction supervisory instruction again by function.Handle according to the instruction process criterion, export to markers command process module 23, delayed telemetry processing module 33, time management module 43, and by telemetry maintenance module 22 according to current state decision with which kind of strategy data framing that takes remote measurement.
This markers command process module 23 is handled indirectly discrete markers instruction and the instruction of software markers, is supported by Visual C++ 6.0 software programming platforms, cooperates C++ timer class and list data structure to realize.When satellite time arrives the moment that the markers instruction should be carried out, then carry out command adapted thereto.If discrete indirectly markers instruction is then directly carried out; If the instruction of software markers then judges that according to command content current satellite should be left the country or immigration, and storage or following biography of correspondingly notifying delayed telemetry processing module 33 to carry out the delayed telemetry data.
These delayed telemetry processing module 33 management satellites carry out the storage of delayed telemetry data overseas, and in the domestic delayed telemetry data that pass the last storage down.Except that the instruction of software markers, delayed telemetry storage/following teletype command also can be changed its state in real time.This module is supported by Visual C++ 6.0 software programming platforms, cooperates C++ file operation class to realize.
43 pairs of satellite times of this time management module manage and safeguard.This module is supported by Visual C++ 6.0 software programming platforms, cooperates C++ system time administrative class to realize.The instruction of relative number pipe has: time service is instructed, and satellite time is changed to the time of appointment; When concentrating the school, set or set back current satellite time ahead according to the time difference in the command content; Evenly during the school,, set or set back satellite time ahead every designated time intervals according to the time difference in the command content.
Switching between the mode of operation of these operational mode maintenance module 53 management satellites, this module is supported by Visual C++ 6.0 software programming platforms.Mode of operation comprises: offline mode, at rail service mode and contingency mode.Offline mode and belong to normal mode at the rail service mode adopts the AOS standard, but only possesses simple observing and controlling function at the rail service mode; Contingency mode adopts conventional P CM frame format biographys that take remote measurement down, when telemetry data stream unusually or during interruption, switches to and carries out fault analysis under the contingency mode.
This telemetry maintenance module 42 finally is created on the 128 byte telemetries of transmitting on the physical channel according to the AOS second-level dispatching strategy framing that takes remote measurement, and exports to transmission module 52 under the remote measurement.The second-level dispatching strategy is PK scheduling and VC scheduling, as shown in Figure 3.Can enable or forbid certain PK, VC by telecommand, or change the following biography ratio of certain VC, or change the satellite mode of operation, it be tactful dynamically to adjust down biography, reaches the adjustable, controlled of biography cycle under the parameter.
Described module 42 is supported by Visual C++ 6.0 software programming platforms.Wherein the processing flow chart of VC scheduling as shown in Figure 8.At first pass down strategy, if offline mode then passes AOS standard telemetry down, if then descend biography only to comprise the VC6 of important telemetry parameter, if contingency mode then passes by under the frame format at the rail service mode according to the work at present model selection.When the remote measurement of AOS standard passes down, at 1 second cycle inter-sync channel and each time of asynchronous channel biography one frame data.The corresponding VC1 of synchronizing channel, asynchronous channel corresponding VC2, VC3, VC4, and VC2, VC3, VC4 all can be provided with separately enable illegal state and priority, realize passing down according to different proportion.Different priorities and enable, the following biography ratio when illegal state is provided with is as shown in the table:
Wherein the treatment scheme of PK scheduling as shown in Figure 9.The PK scheduling strategy difference of each VC roughly can be divided into 2 kinds: subpackage passes down and passes down continuously.At first judge and currently should descend pass that PK, and whether this PK enables, if enable then these PK data are encapsulated, if do not enable then not judge whether a PK after it enables, up to finding a PK is (if VC enables, then the having at least a PK to enable) that enables.The PK data are encapsulated and will carry out according to the actual schedule strategy, if adopt subpackage to pass down, then being filled to designated length (the normally integral multiple of sub-packet length) carries out subpackage again, and passes first son bag down; Pass down if adopt continuously, then the PK data filled out appointed positions according to the first top guide pointer of MPDU, if these PK data too weak point can not fill up the MPDU data field, then to calculate the position that next PK inserts, then insert data, till filling up the MPDU data field, descend to pass then.The following frame telemetry that passed needs to judge whether this PK that passes has down passed down, if having, then then passes down next time, for the subpackage strategy, i.e. and second, the 3rd of biography, sub bag to the last down; For continuous strategy, be about to the PK remaining data and insert MPDU data field head, insert next PK data afterwards.
Described external data is injected and reception environment 40, realizes the function of user's Long-distance Control.It by external data inject 51, telemetry receives 61 and transmit Data Receiving 71 these 3 parts and form, they are 3 independently functions, between do not have annexation;
This external data is injected 51 and is finished the upstream data function of injecting, exports to upstream data pretreatment module 12 by Ethernet 30;
This telemetry receives 61 and is responsible for receiving the real-time telemetry frame data that transmission module 52 is exported under the remote measurement;
This transmits the forwarding data that Data Receiving 71 is responsible for receiving upstream data pretreatment module 12 and 22 outputs of telecommand processing module.
3, advantage and effect: as can be seen from the above description, this satellite data management platform has adopted the AOS standard, and dirigibility is strong, can change at any time as required to pass strategy down, makes exploitation high-level data business become possibility.Realized following technique effect:
(1) realized AOS telemetry standards second-level dispatching strategy.Can change the PK number among each VC according to actual needs, and the length of each PK, reach flexible configuration;
(2) realized AOS remote control standard, and realized the function of transmission control system under data management and the remote measurement, reached the purpose that passes strategy under the real time modifying with indirect instruction;
(3) data service with different rates is incorporated in the same data stream, has improved channel utilization;
(4) function configurable, can expand, therefore when the data management system of the different satellites of simulation, only need do very little change;
(5) stored telecommand of receiving and the telemetry that passes down, used for subsequent analysis and inspection.
In sum, the processing procedure that the present invention can the real time modelling satellite remote command and to the influence of parameter and running status realizes that the remote measurement of second-level dispatching passes strategy down, and realizes data management function on the star.It has practical value and application prospect extensively in satellite data system emulation field.
(4) description of drawings
Fig. 1 is based on the satellite data system emulation platform synoptic diagram of AOS standard;
Fig. 2 simulation process control module synoptic diagram;
Fig. 3 remote measurement passes second-level dispatching strategy synoptic diagram down;
Fig. 4 telecommand injection module treatment scheme synoptic diagram;
Fig. 5 simulation initialisation and parameter configuration module treatment scheme synoptic diagram;
Fig. 6 upstream data pretreatment module treatment scheme synoptic diagram;
Fig. 7 telecommand processing module is to the treatment scheme synoptic diagram of telecommand frame;
The treatment scheme synoptic diagram of Fig. 8 telemetry maintenance module VC scheduling;
The treatment scheme synoptic diagram of Fig. 9 telemetry maintenance module PK scheduling;
Symbol description is as follows among the figure:
10 databases; 20 data system simulation softwares; 30 Ethernets;
40 external datas are injected and reception environment; 11 telecommand injection modules;
21 simulation initialisation and parameter configuration module; 31 data management modules;
41 simulation status display modules; 12 upstream data pretreatment module;
22 telecommand processing modules; 32 simulation process control modules;
42 telemetry maintenance modules; Transmission module under 52 remote measurements;
13 indirect instruction processing modules; 23 markers command process module;
33 delayed telemetry processing modules; 43 time management modules;
53 operational mode maintenance modules;
(5) embodiment
As shown in Figure 1, a kind of satellite data system emulation platform of the present invention based on the AOS standard, total system comprises 3 parts: 1, database 10, storage PK parameter name and position, the telemetry parameter of storage telecommand correspondence changes; 2, data system simulation software 20 finishes the copying based on the satellite data management system of AOS standard; 3, external data is injected and reception environment 40, and the data of injection to data system simulation software 20 are provided, and receives the remote measurement of its output and transmit data.Interconnected relationship between them is: external data is injected and the output of reception environment 40 is connected to data system simulation software 20 by Ethernet 30, the SQL query statement output of data system simulation software 20 is connected to database 10, database 10 returns to data system simulation software 20 with Query Result, and the telemetry of data system simulation software 20 and the output of forwarding data are connected to external data and inject and reception environment 40.
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Its concrete workflow is as follows:
Simulation initialisation and 21 pairs of data system emulations of parameter configuration module software 20 carry out initialization, and start emulation;
Inject and reception environment 40 injection upstream datas by external data, pass to, perhaps directly inject upstream datas and give upstream data pretreatment module 12, at first carry out data qualification by telecommand injection module 11 by Ethernet 30.The data that need transmit are exported to external data and are injected and reception environment 40, and telecommand and execution pulse width are then exported to telecommand processing module 22 and handled;
If the instruction of receiving is a direct instruction, then wait pending pulse width.If the instruction of receiving is indirect instruction, and not setting of the space-ground closed loop comparison zone bit in the instruction top guide, then directly extract all the number pipe command units in the indirect instruction, carry out successively; If the space-ground closed loop comparison zone bit of instruction in the top guide is provided with, then command content is inserted space-ground closed loop comparison PK and enabled, make it to pass down with remote measurement, wait for that comparison correct back in ground sends fill order, carries out again;
Fig. 2 has provided the structure of simulation process control module, and disposal route is as follows:
Indirect instruction processing module 13 is handled the indirect instruction in the telecommands, extracts number pipe instruction wherein, splices, classification, verification.The instruction of number pipe can be divided into remote measurement dependent instruction, housekeeping instruction, instruction supervisory instruction again by function.Handle according to the instruction process criterion, export to markers command process module 23, delayed telemetry processing module 33, time management module 43, and by telemetry maintenance module 42 according to current state decision with which kind of strategy data framing that takes remote measurement.
Markers command process module 23 is handled indirectly discrete markers instruction and the instruction of software markers.When satellite time arrives the moment that the markers instruction should be carried out, then carry out command adapted thereto.If discrete indirectly markers instruction is then directly carried out; If the instruction of software markers then judges that according to command content current satellite should be left the country or immigration, and storage or following biography of correspondingly notifying delayed telemetry processing module 33 to carry out the delayed telemetry data.
Delayed telemetry processing module 33 management satellites carry out the storage of delayed telemetry data overseas, and in the domestic delayed telemetry data that pass the last storage down.Except that the instruction of software markers, delayed telemetry storage/following teletype command also can be changed its state in real time.
43 pairs of satellite times of time management module manage and safeguard.The instruction of relative number pipe has: time service is instructed, and satellite time is changed to the time of appointment; When concentrating the school, set or set back current satellite time ahead according to the time difference in the command content; Evenly during the school,, set or set back satellite time ahead every designated time intervals according to the time difference in the command content.
Switching between the mode of operation of operational mode maintenance module 53 management satellites.Mode of operation comprises: offline mode, at rail service mode and contingency mode.Offline mode and belong to normal mode at the rail service mode adopts the AOS standard, but only possesses simple observing and controlling function at the rail service mode; Contingency mode adopts conventional P CM frame format biographys that take remote measurement down, when telemetry data stream unusually or during interruption, switches to and carries out fault analysis under the contingency mode.
Fig. 3 has provided and has passed second-level dispatching strategy synoptic diagram under the remote measurement.Physical channel has only one, and main channel is provided with seven VC, and the data of channel are divided into packet format and frame format again, and packet format is data cell with PK, and frame format is then by radio frequency channel table organization data.
The PK scheduling strategy is as follows: according to packing degree difference, can be divided into source bag data cell (being called for short EPDU), multi-source bag data cell (being called for short MPDU), virtual channel data unit unit (being called for short VCDU), Channel Access Data Unit unit (abbreviation CADU) four kinds.
The form of EPDU can reflect the top guide of this PK information for the PK data add 6 bytes, is the minimum unit that PK transmits in VC.According to actual conditions, PK can subpackage be a plurality of EPDU also with an EPDU, can reflect the branch package informatin in top guide.Form is as follows;
MPDU utilizes multiplexed business that a plurality of EPDU are combined by certain format, so that the shared VC transmission of a plurality of PK.Form is as follows;
| First top guide pointer | The meaning in MPDU bag territory |
| ??i(2≤i≤??113) | The reference position of first PK is in i the byte of this MPDU |
| ??0x7ff | Have only the PK data among this MPDU, do not have top guide |
| ??0x7fe | It all is padding data |
The VCDU data layout is made of leading head, insertion territory, data field and tailer sequence, and wherein data field can be MPDU, also can be the EPDU data by other format combination, adds EPDU etc. as fixed byte.Form is as follows;
CADU adds that by VCDU synchronous head forms, and is the data layout that finally transmits on physical channel.The CADU data layout is as follows, and the length of CADU is 128 bytes.The down channel bit rate is 2048bps, so the transmission cycle of CADU is 500ms.
Fig. 4 has provided telecommand injection module treatment scheme synoptic diagram.Treatment scheme is: at first need the user to select to send common direct instruction or indirect instruction, if send direct instruction then input instruction form, instruction number and PN sign indicating number, find the instruction word of order format correspondence, the 15 bytes comparison sign indicating number that inquiry direct instruction code table finds the instruction correspondence according to institute's input information query configuration file, according to the definition of order format each several part is inserted the relevant position respectively then, gather into a complete direct instruction, successively send instruction and carry out pulse width by udp protocol; If send indirect instruction then input instruction number, indirect instruction number and PN sign indicating number, find the instruction word of order format correspondence, the 15 bytes comparison sign indicating number that inquiry direct instruction code table finds the indirect instruction correspondence according to institute's input information query configuration file, and inquiry indirect instruction code table finds the order code of indirect instruction correspondence, according to the definition of order format each several part is inserted the relevant position respectively then, gather into a complete indirect instruction, send instruction by udp protocol.
Fig. 5 has provided simulation initialisation and parameter configuration module treatment scheme synoptic diagram, idiographic flow is: at first carry out the database access initialization, read configuration file, codes table file, source bag initial value file then, and carry out the initialization of each PK and VC, prepare for remote measurement passes down.Create associated documents at last,, and start emulation as journal file, remote measurement storage file etc.
Fig. 6 has provided upstream data pretreatment module treatment scheme synoptic diagram, and idiographic flow is: at first classify according to information type, telecommand frame and execution pulse width are passed to telecommand processing module 22 and are carried out subsequent treatment; Receive and interrupt then revising this machine time second network time, be consistent with the central site network time; The departure time and orbital tracking do not process, and directly are transmitted to external data and inject and reception environment 40.
Fig. 7 has provided the treatment scheme synoptic diagram of telecommand processing module to the telecommand frame, and the idiographic flow step is as follows:
1. checking synchronous code.If mistake leaps to 12;
2. checking lead code.If lead code is correct, leap to 4; If mistake continues;
3. verify special lead code.If mistake leaps to 12;
4. checking address code.If mistake leaps to 12;
5. verify the PN sign indicating number.If mistake leaps to 12;
6. extract 15 bytes comparison sign indicating number, whether the inquiry code table has corresponding instruction number.If have, leap to 9, if do not have, continue;
7. judge whether to be proportional command.If, continue, if not, leap to 12;
8. withdrawal ratio word;
9. place the state of translating, and call simulation status display module 41 and show;
10. judge whether to be indirect instruction.If, call indirect instruction processing module 13, if not, continue;
11. etc. pending pulse width;
12. finish;
Fig. 8 has provided the treatment scheme synoptic diagram of telemetry maintenance module VC scheduling.The VC scheduling strategy is as follows: dispatch according to method synchronous, asynchronous combination.VC1 is a synchronizing channel, and the transmission cycle is 1s; VC2～VC4 is an asynchronous channel, and the transmission cycle is 1s.Asynchronous communication is provided with 2 kinds of priority, and priority 1 is higher than priority 2.Asynchronous channel VC3 belongs to accident, generally has only VC2, VC4 to participate in asynchronous schedule.Being provided with of priority can be provided with instruction adjustment flexibly by the priority in the indirect instruction.Idiographic flow is as follows: at first pass down strategy according to the work at present model selection, if offline mode then passes AOS standard telemetry down, if then descend biography only to comprise the VC6 of important telemetry parameter at the rail service mode, if contingency mode then passes by under the frame format.When the remote measurement of AOS standard passes down, at 1 second cycle inter-sync channel and each time of asynchronous channel biography one frame data.The corresponding VC1 of synchronizing channel, asynchronous channel corresponding VC2, VC3, VC4, and VC2, VC3, VC4 all can be provided with separately enable illegal state and priority, realize passing down according to different proportion.Different priorities and enable, the following biography ratio when illegal state is provided with is as shown in the table:
The treatment scheme of PK scheduling as shown in Figure 9.The PK scheduling strategy difference of each VC roughly can be divided into 2 kinds: subpackage passes down and passes down continuously.At first judge and currently should descend pass that PK, and whether this PK enables, if enable then these PK data are encapsulated, if do not enable then not judge whether a PK after it enables, up to finding a PK is (if VC enables, then the having at least a PK to enable) that enables.The PK data are encapsulated and will carry out according to the actual schedule strategy, if adopt subpackage to pass down, then being filled to designated length (the normally integral multiple of sub-packet length) carries out subpackage again, and passes first son bag down; Pass down if adopt continuously, then the PK data filled out appointed positions according to the first top guide pointer of MPDU, if these PK data too weak point can not fill up the MPDU data field, then to calculate the position that next PK inserts, then insert data, till filling up the MPDU data field, descend to pass then.The following frame telemetry that passed needs to judge whether this PK that passes has down passed down, if having, then then passes down next time, for the subpackage strategy, i.e. and second, the 3rd of biography, sub bag to the last down; For continuous strategy, be about to the PK remaining data and insert MPDU data field head, insert next PK data afterwards.
As can be seen from the above description, there are three kinds of approach in the following biography cycle that change certain PK: a kind of is that the enabling of other PK among the VC, illegal state are set under it; Second kind is the priority (only being applicable to asynchronous channel) that VC under it is set; The third is that the enabling of other asynchronous channel, illegal state (only being applicable to asynchronous channel) are set.Can change the biography cycle under the parameter neatly by these three kinds of methods, compare conventional P CM remote measurement system, advantage is apparent.
Claims (6)
1. satellite data system emulation platform based on the AOS standard, it is characterized in that: it comprises 3 parts: one, database (10), storage PK parameter name and position, the telemetry parameter of storage telecommand correspondence changes; Two, data system simulation software (20) finishes the copying based on the satellite data management system of AOS standard; Three, external data is injected and reception environment (40), and the data of injection to data system simulation software 20 are provided, and receives the remote measurement of its output and transmit data; Interconnected relationship between them is: external data is injected and the output of reception environment (40) is connected to data system simulation software (20) by Ethernet (30), the SQL query statement of data system simulation software (20) output is connected to database (10), database (10) returns to data system simulation software (20) with Query Result, and the telemetry of data system simulation software (20) output and forwarding data are connected to external data and inject and reception environment (40).
Described database (10) adopts Microsoft SQL Server2000 to realize; Data system simulation software (20) conducts interviews to database by the SQL statement under the Visual C++6.0 environment;
Described data system simulation software (20), and carry out data interaction by Ethernet (30) between external data injection and the reception environment (40), used procotol is the point-to-point and UDP multicast of UDP;
This data system simulation software (20) is made up of telecommand injection module (11), simulation initialisation and parameter configuration module (21), data management module (31) and simulation status display module (41) four parts; Wherein, telecommand injection module (11), simulation initialisation and parameter configuration module (21), simulation status display module (41) are periphery, are the interfaces of user's operational simulation software; Data management module (31) is the core, finishes the data system copying; Interconnected relationship between this 4 part is: the output of telecommand injection module (11) and simulation initialisation and parameter configuration module (21) all is connected to data management module (31), and the output of data management module (31) is connected to simulation status display module (41);
This telecommand injection module (11) is passed to upstream data pretreatment module (12) with the user from the telecommand that this machine injects with the coded instructions form, is implemented under the situation that does not have external command to inject and still can finishes copying;
This simulation initialisation and parameter configuration module (21) are passed to correlation module with the user by the initial parameter value of binary file, configuration file appointment and are carried out initialization, and start emulation; Binary file is the initial value of each PK parameter; Configuration file content has two kinds, and a kind of is parameter configuration, and another kind is the telecommand code table, stores 15 bytes comparison sign indicating number and corresponding instruction number;
This simulation status display module (41) is realized two functions: real-time parameter shows and parameter modification; The real-time parameter Presentation Function receives the data of transmission module (52) under the remote measurement, shows the current telemetry frame source code of biography down, and the important parameter that can reflect the simulation process state shows after translating into physical significance; Receive the data of telecommand processing module (22), the time of reception of display remoting instruction, instruction number and disposition; The parameter modification function offers the user revises the PK parameter value in simulation process interface, the parameter name and the currency that in list box, show certain all parameter of PK of selecting by the user, click certain parameter name, the new value of input in " modification value " hurdle, point " is determined " to finish modification, and after this this parameter is descended to pass with amended value;
Described simulation status display module (41) is supported by Visual C++6.0 software programming platform, mainly uses the demonstration that list control and edit box control are realized data;
This data management module (31) comprises 5 submodules: transmission module (52) under upstream data pretreatment module (12), telecommand processing module (22), simulation process control module (32), telemetry maintenance module (42) and the remote measurement; Interconnected relationship between them is: the output of upstream data pretreatment module (12) is connected to telecommand processing module (22), the output of telecommand processing module (22) is connected to simulation process control module (32), and the output that the output of simulation process control module (32) is connected to telemetry maintenance module (42), telemetry maintenance module (42) is connected to transmission module under the remote measurement (52);
This upstream data pretreatment module (12) is classified, is handled all upstream datas; Upstream data has five kinds: telecommand frame, execution pulse width, interruption second network time, the departure time and orbital tracking;
This telecommand processing module (22) is handled the telecommand frame and the execution pulse width of upstream data pretreatment module (12) output, finishes checking, decoding and execution to instruction; Telecommand is divided into two kinds of direct instruction and indirect instructions, and the instruction class under direct instruction and the traditional measuring and control data system seemingly has complete issuing an order the cycle, i.e. the telecommand frame---and carry out pulse width, realize star ground space-ground closed loop comparison; And indirect instruction is the instruction bag that comprises at the number pipe instruction of AOS data management function, and according to the length of number pipe instruction, an indirect instruction can comprise the instruction of many number pipes, and the instruction of a number pipe can subpackage be many indirect instructions also; Indirect instruction has only the telecommand frame, does not carry out pulse width, but can enable the following biography of space-ground closed loop comparison PK by space-ground closed loop comparison zone bit in the instruction top guide is set, and after the ground comparison was correct, the execution command that sends again in the indirect instruction was carried out;
This simulation process control module (32) receives the instruction execution result of telecommand processing module (22) output, instruction is further handled to part, and it comprises 5 submodules: indirect instruction processing module (13), markers command process module (23), delayed telemetry processing module (33), time management module (43) and operational mode maintenance module (53); Interconnected relationship between them is: the output of indirect instruction processing module (13) is connected to markers command process module (23), delayed telemetry processing module (33), time management module (43), select the corresponding subsequent processing module according to different output, the input of operational mode maintenance module (53) is provided by telecommand processing module (22);
This indirect instruction processing module (13) is handled the indirect instruction in telecommand, extracts number pipe instruction wherein, splices, classification, verification, is supported by Visual C++6.0 software programming platform; The instruction of number pipe can be divided into remote measurement dependent instruction, housekeeping instruction, instruction supervisory instruction again by function; Handle according to the instruction process criterion, export to markers command process module (23), delayed telemetry processing module (33), time management module (43), and by telemetry maintenance module (22) according to current state decision with which kind of strategy data framing that takes remote measurement;
This markers command process module (23) is handled indirectly discrete markers instruction and the instruction of software markers, is supported by Visual C++6.0 software programming platform, cooperates C++ timer class and list data structure to realize; When satellite time arrives the moment that the markers instruction should be carried out, then carry out command adapted thereto; If discrete indirectly markers instruction is then directly carried out; If the instruction of software markers then judges that according to command content current satellite should be left the country or immigration, and storage or following biography of correspondingly notifying delayed telemetry processing module (33) to carry out the delayed telemetry data;
This delayed telemetry processing module (33) management satellite carries out the storage of delayed telemetry data overseas, and in the domestic delayed telemetry data that pass the last storage down, except that the instruction of software markers, delayed telemetry storage/following teletype command also can be changed its state in real time; This module is supported by Visual C++6.0 software programming platform, cooperates C++ file operation class to realize;
This time management module (43) manages and safeguards satellite time; This module is supported by Visual C++6.0 software programming platform, cooperates C++ system time administrative class to realize; The instruction of relative number pipe has: time service is instructed, and satellite time is changed to the time of appointment; When concentrating the school, set or set back current satellite time ahead according to the time difference in the command content; Evenly during the school,, set or set back satellite time ahead every designated time intervals according to the time difference in the command content;
Switching between the mode of operation of this operational mode maintenance module (53) management satellite, this module is supported by Visual C++6.0 software programming platform; Mode of operation comprises: offline mode, at rail service mode and contingency mode; Offline mode and belong to normal mode at the rail service mode adopts the AOS standard, but only possesses simple observing and controlling function at the rail service mode; Contingency mode adopts conventional P CM frame format biographys that take remote measurement down, when telemetry data stream unusually or during interruption, switches to and carries out fault analysis under the contingency mode;
This telemetry maintenance module (42) finally is created on the 128 byte telemetries of transmitting on the physical channel according to the AOS second-level dispatching strategy framing that takes remote measurement, and exports to transmission module 52 under the remote measurement; The second-level dispatching strategy is PK scheduling and VC scheduling, can enable or forbids certain PK, VC by telecommand, or change the following biography ratio of certain VC, or change the satellite mode of operation, and it is tactful dynamically to adjust down biography, reaches the adjustable, controlled of biography cycle under the parameter;
Transmission module under this remote measurement (52) is passed to external data with 128 byte telemetries of telemetry maintenance module (42) output by network interface and is injected and reception environment (40) demonstration and processing; Transmission module under this remote measurement (52) is supported by visual c++ 6.0 software programming platforms, uses udp protocol to send telemetry;
Described external data is injected and reception environment (40), realizes the function of user's Long-distance Control; It by external data inject (51), telemetry receives (61) and this 3 part of forwarding Data Receiving (71) is formed, they are 3 independently functions, between do not have annexation;
This external data is injected (51) and is finished the upstream data function of injecting, exports to upstream data pretreatment module (12) by Ethernet (30);
This telemetry receives the real-time telemetry frame data that (61) are responsible for receiving transmission module (52) output under the remote measurement;
This transmits the forwarding data that Data Receiving (71) is responsible for receiving upstream data pretreatment module (12) and telecommand processing module (22) output.
2. a kind of satellite data system emulation platform according to claim 1 based on the AOS standard, it is characterized in that: described telecommand injection module (11) is supported by Visua1 C++6.0 software programming platform, in conjunction with configuration file and codes table file, realize that direct instruction and part have the transmission of the indirect instruction of instruction number; At first need the user to select to send common direct instruction or indirect instruction, if send direct instruction then input instruction form, instruction number and PN sign indicating number, find the instruction word of order format correspondence, the 15 bytes comparison sign indicating number that inquiry direct instruction code table finds the instruction correspondence according to institute's input information query configuration file, according to the definition of order format each several part is inserted the relevant position respectively then, gather into a complete direct instruction, successively send instruction and carry out pulse width by udp protocol; If send indirect instruction then input instruction number, indirect instruction number and PN sign indicating number, find the instruction word of order format correspondence, the 15 bytes comparison sign indicating number that inquiry direct instruction code table finds the indirect instruction correspondence according to institute's input information query configuration file, and inquiry indirect instruction code table finds the order code of indirect instruction correspondence, according to the definition of order format each several part is inserted the relevant position respectively then, gather into a complete indirect instruction, send instruction by udp protocol.
3. a kind of satellite data system emulation platform according to claim 1 based on the AOS standard, it is characterized in that: described simulation initialisation and parameter configuration module (21) are supported by Visual C++6.0 software programming platform, at first carry out the database access initialization, read configuration file, codes table file, source bag initial value file then, and carry out the initialization of each PK and VC, prepare for remote measurement passes down, create associated documents at last and start emulation.
4. a kind of satellite data system emulation platform according to claim 1 based on the AOS standard, it is characterized in that: described upstream data pretreatment module (12) is supported by Visua1 C++6.0 software programming platform, at first classify according to information type, telecommand frame and execution pulse width are passed to telecommand processing module (22) and are carried out subsequent treatment; Receive and interrupt then revising this machine time second network time, be consistent with the central site network time; The departure time and orbital tracking do not process, and directly are transmitted to external data and inject and reception environment (40).
5. a kind of satellite data system emulation platform according to claim 1 based on the AOS standard, it is characterized in that: described telecommand processing module (22) is supported by Visual C++6.0 software programming platform, and is as follows to the processing idiographic flow step of telecommand frame:
1.. the checking synchronous code, if mistake is leapt to step
2.. the checking lead code, if lead code is correct, leap to step 4.; If mistake continues;
3.. verify special lead code, if mistake is leapt to step
4.. the checking address code, if mistake is leapt to step
5.. checking PN sign indicating number, if mistake is leapt to step
6.. extract 15 bytes comparison sign indicating number, whether the inquiry code table has corresponding instruction number, if having, leaps to step 9., if do not have, continues;
7.. judge whether to be proportional command, if, continue, if not, leap to step
8.. the withdrawal ratio word;
9.. place the state of translating, and call simulation status display module (41) and show;
10.. judge whether to be indirect instruction, if, call indirect instruction processing module (13), if not, continue;
Receive the execution pulse width, the telemetry parameter of command adapted thereto correspondence changes and execution in the Query Database (10), and the instruction process state transfers stationary state to by the state of translating, and waits for next bar telecommand; For the instruction relevant with operational mode, the operational mode maintenance module (53) that also need call in the simulation process control module (32) carries out the state change.
6. a kind of satellite data system emulation platform based on the AOS standard according to claim 1 is characterized in that: described telemetry maintenance module (42) is supported by Visual C++6.0 software programming platform; Wherein the process flow steps of VC scheduling is: at first pass strategy down according to the work at present model selection, if offline mode then passes AOS standard telemetry down, if then descend biography only to comprise the VC6 of important telemetry parameter at the rail service mode, if contingency mode then passes by under the frame format; When the remote measurement of AOS standard passes down, at 1 second cycle inter-sync channel and each time of asynchronous channel biography one frame data; The corresponding VCl of synchronizing channel, asynchronous channel corresponding VC2, VC3, VC4, and VC2, VC3, VC4 all can be provided with separately enable illegal state and priority, realize passing down according to different proportion; Wherein the process flow steps of PK scheduling is: the PK scheduling strategy difference of each VC roughly can be divided into 2 kinds: subpackage passes down and passes down continuously; At first judge currently should descend pass that PK, and whether this PK enable, if enable then these PK data are encapsulated, if do not enable then not judge whether a PK after it enables, up to finding a PK to enable; The PK data are encapsulated and will carry out according to the actual schedule strategy, if adopt subpackage to pass down, then be filled to designated length, normally the integral multiple of sub-packet length carries out subpackage again, and passes first son bag down; Pass down if adopt continuously, then the PK data filled out appointed positions according to the first top guide pointer of MPDU, if these PK data too weak point can not fill up the MPDU data field, then to calculate the position that next PK inserts, then insert data, till filling up the MPDU data field, descend to pass then; The following frame telemetry that passed needs to judge whether this PK that passes has down passed down, if having, then then passes down next time, for the subpackage strategy, i.e. and second, the 3rd of biography, sub bag to the last down; For continuous strategy, be about to the PK remaining data and insert MPDU data field head, insert next PK data afterwards.
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| CN101770541B (en) | 2012-03-21 |
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