CN107219843B - MIL-STD-1553B bus node fault-signal simulator - Google Patents
MIL-STD-1553B bus node fault-signal simulator Download PDFInfo
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- CN107219843B CN107219843B CN201710464008.7A CN201710464008A CN107219843B CN 107219843 B CN107219843 B CN 107219843B CN 201710464008 A CN201710464008 A CN 201710464008A CN 107219843 B CN107219843 B CN 107219843B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0256—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults injecting test signals and analyzing monitored process response, e.g. injecting the test signal while interrupting the normal operation of the monitored system; superimposing the test signal onto a control signal during normal operation of the monitored system
Abstract
The fault-signal simulator of MIL-STD-1553B bus node based on arbitrary-function generator is related to the fault test field of MIL-STD-1553B bus system.The present invention is to solve the problem of that customizing output data using dedicated MIL-STD-1553B generates the fault-signal needed to more comprehensively test entire bus system poor universality.Failure adding module inputs MIL-STD-1553B protocol groups word, adds fault-signal in this group of word, this group of word generates data point；Arbitrary-function generator exports MIL-STD-1553B signal waveform according to data point and gives MIL-STD-1553B level adapter；Signal is changed into level standard and sends message to MIL-STD-1553B bus by MIL-STD-1553B level adapter.It is used for the fault-signal of emulation bus node.
Description
Technical field
The present invention relates to a kind of failure simulation devices, and in particular to the MIL-STD-1553B based on arbitrary-function generator
Bus failure signal imitation.Belong to the fault test field of MIL-STD-1553B bus system.
Background technique
MIL-STD-1553B bus system is widely used in aerospace field, because in such a case, it is steady to system
It is qualitative to have higher requirement, so need before the establishment of MIL-STD-1553B bus system to each node in bus,
It is comprehensively tested including bus control unit (BC) and each remote terminal (RT), observes it in different bus data transfer shapes
Under state, it can guarantee correctly to communicate.Also, in the event of bus failure, whether each node of bus is able to carry out correctly
Error handling mechanism.
It is carried out in test process to it, if using dedicated MIL-STD-1553B node apparatus, when leaving the factory, phase
Producer is answered centainly to carry out comprehensive test to these node apparatus.So setting up total linear system using these node apparatus
When system, often can only test node in normal work the case where, be unable to the case where test node is in abnormal work, even if
Thousands of times work interior joint there is failure, this failure also may be greatly very much it is random, not can be carried out failure customization, so always
Desired this failure of reproduction of line system testers is also very difficult.And it is filled if tested using dedicated MIL-STD-1553B
It sets, although can customize output data generates the fault-signal needed to more comprehensively test entire bus system, in this way
Test device cost it is high, versatility is not strong.For general system testers, a not selection well.
Summary of the invention
The present invention is to solve to customize the fault-signal that output data generates needs using dedicated MIL-STD-1553B
To more comprehensively test entire bus system, the problem of poor universality.MIL- based on arbitrary-function generator is now provided
The fault-signal simulator of STD-1553B bus node.
The fault-signal simulator of MIL-STD-1553B bus node based on arbitrary-function generator, it includes appointing
Meaning function generator, failure adding module and MIL-STD-1553B level adapter,
Failure adding module, for inputting MIL-STD-1553B protocol groups word, in MIL-STD-1553B protocol groups word
Fault-signal is added, which generates data point；
The detailed process of the addition fault-signal are as follows:
The communication information in bus is write with 20 coding lines, 20 status words and 20 data words, according to event
Barrier demand adds one or more kinds of mistakes in coding line, status word and data word, constitutes MIL-STD-1553B bus section
The fault-signal of point；
The mode that mistake is added in coding line is included in synchronous head addition mistake, adds Manchester in parity check bit
Code error adds Manchester's code mistake in remote terminal address and adds Manchester's code mistake in instruction segment,
The mode that mistake is added in status word is included in synchronous head addition mistake, adds Manchester in parity check bit
Code error adds Manchester's code mistake in remote terminal address and adds Manchester's code mistake in state section,
The mode for adding mistake in data words is included in synchronous head addition mistake, adds Manchester in parity check bit
Code error and data segment add Manchester's code mistake,
Arbitrary-function generator, for exporting MIL-STD-1553B signal waveform according to the data point of generation, by the waveform
It is sent to MIL-STD-1553B level adapter；
MIL-STD-1553B level adapter meets MIL- for the output signal of arbitrary-function generator to be changed into
Level standard as defined in STD-1553B agreement sends message to MIL-STD-1553B bus.
Preferably, when MIL-STD-1553B level adapter is communicated with remote terminal, fault-signal simulator
As a bus control unit, coding line is sent to remote terminal, to simulate bus in MIL-STD-1553B bus communication
Controller sends message to remote terminal；Transmission/received bit in instruction segment determines transmission/reception instruction, if transmission/reception
What position was sent is to send instruction, and arbitrary-function generator exports the coding line pre-seted using data point to remote terminal；Such as
What fruit transmission/received bit was sent is to receive instruction, and fault-signal simulator should immediately receive rule in instruction after receiving coding line
Fixed number purpose data word；
When MIL-STD-1553B level adapter is communicated with bus control unit, fault-signal simulator conduct
One remote terminal, bus control unit send coding line to remote terminal, and MIL-STD-1553B level adapter is for detecting
The rising edge that coding line is sent in MIL-STD-1553B bus provides triggering to the external trigger input terminal of arbitrary-function generator
Signal, so that arbitrary-function generator exports the status word and data word pre-seted using data point, to simulate MIL-
The message that STD-1553B bus communication remote terminal is exported to bus control unit.
Preferably, MIL-STD-1553B level adapter includes MIL-STD-1553B protocol transceiver and delay circuit,
MIL-STD-1553B protocol transceiver meets MIL- for the output signal of arbitrary-function generator to be changed into
Level standard as defined in STD-1553B agreement sends message to MIL-STD-1553B bus；
Delay circuit, for guaranteeing within the period that arbitrary-function generator exports the status word and data word that preset,
Valid data edge should not be received again, avoid the bus response for generating mistake.
The invention has the benefit that
The application is based on arbitrary-function generator, the dedicated level adapter of cooperation MIL-STD-1553B and failure addition
Module, simulated failure signal and simulate to MIL-STD-1553B bus send message.
Firstly, MIL-STD-1553B bus data is more flexibly customized by control arbitrary-function generator realization,
Customization precision can achieve each of each bus word.Tester can be straight in the software interface of failure adding module
The bus of several mistake can also be exported to carry out correct data transmission by seeing customization MIL-STD-1553B bus word content
Word, with emulation bus failure.In addition, the dedicated level adapter of MIL-STD-1553B that the invention includes, is utilized arbitrary function
The external trigger function of generator can simulate the full message response process of mono- bus node of MIL-STD-1553B.So
Tester can test another bus control unit or remote using the device as a specific bus controller or remote terminal
Response of the journey terminal when finding bus failure signal.The application versatility compared with existing bus system improves 5 times or more.
The advantages of the application:
1. device is built simply, at low cost, it is only necessary to the common arbitrary function hairs of an electronic leaning laboratory for special instrument
Raw device.
It 2. the flexibility ratio of test is high, can customize that allocative abilities are strong, be either directed to word content or its event for being included
The setting for any position of any word that a MIL-STD-1553B message amounts in 33 words may be implemented in barrier, host computer.
3. realizing arbitrary-function generator to the responsive operation of bus signals using the method for low cost, make unit simulation
Protocol node is more true and reliable.
Detailed description of the invention
Fig. 1 is the MIL-STD-1553B bus node based on arbitrary-function generator described in specific embodiment one
The fault-signal of fault-signal simulator adds flow chart；
Fig. 2 is the MIL-STD-1553B bus node based on arbitrary-function generator described in specific embodiment one
The schematic illustration of fault-signal simulator；
Fig. 3 is the schematic illustration of MIL-STD-1553B level adapter；
Fig. 4 is 1553B bus topolopy figure；
Fig. 5 is data encoding format waveform diagram；
Fig. 6 is word format；
Fig. 7 is instruction word format；
Fig. 8 is data word format；
Fig. 9 is state word format；
Figure 10 is transmission word format of the controller to remote terminal；
Figure 11 is transmission word format of the remote terminal to controller；
Figure 12 is transmission word format of the remote terminal to remote terminal；
Figure 13 is that transmission is instructed without the mode of data word；
Figure 14 is that the mode of transmission belt data word instructs (transmission)；
Figure 15 is that the mode of transmission belt data word instructs (reception)；
Figure 16 transmits word format to the broadcast of each remote terminal for controller；
Figure 17 is remote terminal to each remote terminal transmission word format；
Figure 18 instructs for the mode without data word；
Figure 19 is that the mode with data word instructs.
Specific embodiment
The fault-signal simulator of MIL-STD-1553B bus node based on arbitrary-function generator, it includes appointing
Meaning function generator, failure adding module and MIL-STD-1553B level adapter,
Failure adding module, for inputting MIL-STD-1553B protocol groups word, in MIL-STD-1553B protocol groups word
Fault-signal is added, which generates data point；
The detailed process of the addition fault-signal are as follows:
The communication information in bus is write with 20 coding lines, 20 status words and 20 data words, according to event
Barrier demand adds one or more kinds of mistakes in coding line, status word and data word, constitutes MIL-STD-1553B bus section
The fault-signal of point；
The mode that mistake is added in coding line is included in synchronous head addition mistake, adds Manchester in parity check bit
Code error adds Manchester's code mistake in remote terminal address and adds Manchester's code mistake in instruction segment,
The mode that mistake is added in status word is included in synchronous head addition mistake, adds Manchester in parity check bit
Code error adds Manchester's code mistake in remote terminal address and adds Manchester's code mistake in state section,
The mode for adding mistake in data words is included in synchronous head addition mistake, adds Manchester in parity check bit
Code error and data segment add Manchester's code mistake,
Arbitrary-function generator, for exporting MIL-STD-1553B signal waveform according to the data point of generation, by the waveform
It is sent to MIL-STD-1553B level adapter；
MIL-STD-1553B level adapter meets MIL- for the output signal of arbitrary-function generator to be changed into
Level standard as defined in STD-1553B agreement sends message to MIL-STD-1553B bus.
Present embodiment the utility model has the advantages that
The mode of failure is added as shown in Figure 1, the synchronous head of write instruction word or status word is first begin to, if at this time
It needs to add mistake, then mistake is added in synchronous head, next when 16 valid data positions and parity check bit is written,
According to the needs of setting failure, Manchester's code mistake can be added in 16 valid data, is added in parity check bit
One or more of Manchester's code mistake, simulated fault signal.
Arbitrary-function generator needs to export a variety of word format bus signals for meeting MIL-STD-1553B agreement, is used for
Carry out information transmission.The application has mainly used the random waveform function of arbitrary-function generator, i.e. user successively edits waveform
Point, signal source exports satisfactory MIL-STD-1553B signal wave form point according to scheduled configuration, to simulate protocol communication
Analog waveform.The part does not require the concrete model of arbitrary-function generator, but must satisfy the following conditions.
Because MIL-STD-1553B agreement provisioning information transmission speed is 1Mb/s, and the coding staff of MIL-STD-1553B
Formula is Manchester's code, so the peak signal output frequency of any wave energy of arbitrary-function generator necessarily is greater than
2Mhz.In addition, if wanting that simulate zero crossing caused by bus failure signal, such as Manchester mistake inclined using the present invention
Difference, agreement regulation zero crossing deviation have to be larger than 25ns.So in this case, each MIL-STD-1553B up to
It less to include 40 random waveform points.In this way, because message as defined in one MIL-STD-1553B agreement of simulation at most includes 33
A word (the message transmission of simulation RT to RT):
33(word number) mono- word of × 20(bus position when number) × 40=26400 points
That is, any wave energy of arbitrary-function generator is at least required to 26400 data point ability of storage
Enough satisfactions emulate MIL-STD-1553B mistake.And in the range of arbitrary-function generator function allows, store energy
Power is stronger, and the present invention can also accomplish the emulation of bus signals finer.
Because the driving capability of arbitrary-function generator is not enough to directly be connected with MIL-STD-1553B bus, the present invention
MIL-STD-1553B level adapter has been used to complete this target.Whole design scheme such as Fig. 3 institute of the level adapter
Show.
The output signal of arbitrary-function generator is changed into after transceiver and meets MIL-STD-1553B agreement regulation
Level standard, so that failure simulation device is mounted in bus system.Arbitrary-function generator output can be to true
Tested MIL-STD-1553B bus apparatus send message, complete fault test to equipment under test node.
Failure adding module is for carrying out the program-controlled of arbitrary-function generator and transmitting waveform data points to it.
According to described previously, arbitrary-function generator needs to customize a large amount of waveform data points, if defeated using manual mode
Enter, it is clear that the extremely consuming time.The application software on computer is write, this problem can not only be solved, additionally it is possible to by MIL-
The customization of STD-1553B bus word becomes more intuitive.For user according to the needs of oneself directly in software interface, input is every
The transmission information of a word does not need additionally to consult MIL-STD-1553B bus protocol again.
The control information that software issues sends arbitrary-function generator to by peripheral hardware cable, and LAN, USB, string can be used
A variety of peripheral hardware cables such as mouth carry out equipment connections.Computer needs to install VISA, and VISA is that VXI plug&play alliance formulates
The general name of I/O interface software standard and its specification.It provides the standard I/O function library for instrument programming, the referred to as library VISA.
VISA function library resides in computer system, is the standard software communication interface of computer and instrument, computer by it come
Control instrument.
By using VISA, the connection of arbitrary-function generator and computer can be ignored specific involved in peripheral hardware cable
Communication protocol is connected using any cable, application software can complete above-mentioned target.
Failure adding module mainly has two-part function, and first is MIL-STD-1553B protocol groups word, is referred to as
MIL-STD-1553B word is formed.In a protocol message transmission, need to complete the customization of most 33 words, the present invention is each
The customization of word is very flexible, has a set of identical group of word process.Second is the program-controlled of instrument, beats on and off including input and output
It closes, the way of output of the downloading of data point and signal configuration etc..
(1) protocol groups word process
Protocol groups word is the setting by user on software interface, becomes that arbitrary-function generator memory can be downloaded to
In data point.Detailed process is as shown in figure attached drawing 1.
This group of word requirements of process carries out most 33 times, this 33 times all data point is then integrated into a data flow,
Downloading for data point.
(2) instrument is program-controlled
The program-controlled direct program-controlled order using instrument of instrument is realized, it should be noted that:
As it was noted above, the message transmission that the present invention simulates has the process of " instrument response --- output ", because arbitrarily
Function generator can only be used as output device, and itself is inputted and detected there is no signal and response function.So of the invention
Previously mentioned MIL-STD-1553B level adapter is cooperated to realize this process using the external trigger of instrument.
Software need to control instrument work in " under external trigger mode ", and be arranged instrument Time delay be it is suitable when
Between.By taking the transmission for simulating RT to BC as an example, MIL-STD-1553B level adapter is in the rising for receiving a coding line synchronous head
After, one trigger signal of arbitrary-function generator is given.Function generator needs wait for a period of time again output signal to avoid
The conflict of bus message, which is the time 20us of a word, so the Time delay for needing to configure instrument is at least 20us.
In preferred embodiment, when MIL-STD-1553B level adapter is communicated with remote terminal, fault-signal mould
Quasi- device sends coding line as a bus control unit, to remote terminal, to simulate MIL-STD-1553B bus communication
Middle bus control unit sends message to remote terminal；Transmission/received bit in instruction segment determines transmission/reception instruction, if hair
Give/received bit sends is to send instruction, arbitrary-function generator exports the finger that has pre-seted to remote terminal using data point
Enable word；If transmission/received bit transmission is to receive instruction, it should immediately receive and refer to after fault-signal simulator reception coding line
The data word of defined amount in enabling；
When MIL-STD-1553B level adapter is communicated with bus control unit, fault-signal simulator conduct
One remote terminal, bus control unit send coding line to remote terminal, and MIL-STD-1553B level adapter is for detecting
The rising edge that coding line is sent in MIL-STD-1553B bus provides triggering to the external trigger input terminal of arbitrary-function generator
Signal, so that arbitrary-function generator exports the status word and data word pre-seted using data point, to simulate MIL-
The message that STD-1553B bus communication remote terminal is exported to bus control unit.
Present embodiment the utility model has the advantages that
By this adapter, the simulation of the defined entire message format of MIL-STD-1553B agreement can also be realized.Cause
Be function generator as just output equipment, test if necessary certain bus control unit (BC) to the response of fault-signal whether
Correctly, need the device with remote terminal (RT) access, and the data for testing remote terminal to bus control unit are transmitted.According to
MIL-STD-1553B agreement transmission regulation, bus control unit is first to one transmission coding line of remote terminal transmission, remote terminal
The data word of loopback status word and respective numbers again.Because arbitrary-function generator is without the true MIL-STD-1553B bus of the image of Buddha
Node equally judges bus word, so the MIL-STD-1553B level adapter that the present invention designs sends coding line by detection
Rising edge, to the external trigger of arbitrary-function generator input provide trigger signal so that arbitrary-function generator export user
The status word and data word pre-seted.
In preferred embodiment, MIL-STD-1553B level adapter include MIL-STD-1553B protocol transceiver and delay
Circuit,
MIL-STD-1553B protocol transceiver meets MIL- for the output signal of arbitrary-function generator to be changed into
Level standard as defined in STD-1553B agreement sends message to MIL-STD-1553B bus；
Delay circuit, for guaranteeing within the period that arbitrary-function generator exports the status word and data word that preset,
Valid data edge should not be received again, avoid the bus response for generating mistake.
Present embodiment the utility model has the advantages that
Because the external trigger input of arbitrary-function generator judges all valid data edges, level adapter prolongs
When circuit part be used to guarantee within the period that arbitrary-function generator exports whole preset datas, valid data should not be received again
Edge.To guarantee that arbitrary-function generator will not be triggered repeatedly, the bus response of mistake is generated.
Embodiment:
Fig. 4 to Figure 19 is the data transmission format in existing bus structures and bus.
Bus brief introduction
MIL-STD-1553B bus abbreviation 1553B bus, script is that the standard of U.S. army's Integrated Avionics System is total
Line.Due to 1553B bus reliability with higher and safety, it is widely used in Aeronautics and Astronautics, navigation and other weapons
On change system, there is the title of " a square army ".Foreign countries have the history of many decades to the research and application of 1553B bus,
1973, in order to simplify the line between different air equipment interfaces, the safety of improve data transfer, US military and government
MIL-STD-1553 standard is disclosed, the military uses this standard in F16 fighter plane for the first time, and this standard is instead of for aircraft
The bulky equipment that data are transmitted between each section, greatly optimizes the performance of aircraft.1978 later, US military was announced
MIL-STD-1553B standard simultaneously " freezes " standard, which quotes always till now.Also corresponding army's mark has been formulated in the country
GJB289A studies 1553B bus, and the research of complete import finally from the beginning is imitated, and the country is to 1553B bus
Use also reached a new height, which has been successfully applied in newest opportunity of combat.
Bus structures
Fig. 4 is 1553B bus topolopy；1553B bus is digital time-devision system instruction/response type multi-path transmission data
Bus is mainly made of data/address bus, terminal or subsystem terminal interface.Terminal is the interface electricity of data/address bus and subsystem
Sub-component, it can be bus control unit (BC), remote terminal (RT) or bus monitor (BM), the typical total knot of 1553B
Structure is as shown in Figure 1.Above-mentioned three kinds of basic communication terminals are interconnected by data/address bus, bus control unit issue order or
Data can be delivered to all remote terminals by data/address bus, and the condition responsive and data that each remote terminal issues can also
It is delivered to remote terminal every other in bus control unit and bus.
(1) bus control unit (Bus Controller)
The promoter of the control of bus, manager and all communication operations.Only one terminal in any moment bus
Bus system is implemented to control.But there can be the bus control unit of backup.
(2) remote terminal (Remote Terminal)
The effective order that bus control unit receives from bus is made a response, loopback status word, completes corresponding actions.
It does not have bus marco function, but can be used as the backup of bus control unit.
(3) bus monitor (Bus Monitor)
There can be a bus monitor in bus, the monitoring of data, record in bus.It is not responding to total line traffic control
Any order of device processed nor affects on the information transmission in bus.
Data format
Data encoding format is as shown in figure 5, the numeric data code transmitted in 1553B bus is II type biphase level of Manchester
Code.Logic 1 is that a bipolar coding signal 1/0(i.e. positive pulse is followed by a negative pulse).Logical zero is bipolar coding signal 0/
A 1(i.e. negative pulse is followed by a positive pulse).Bit Transmission Rate in bus is 1.0Mb/s, is transmitted for half-duplex mode,
Midpoint at each occurs for zero passage jump, as shown in Figure 2.
Data transmission in bus is as unit of message, and message is by three kinds of command word, data word and status word word classes
Type is constituted.Word length is that 16 valid data positions add synchronous head Parity bits totally 20, and word format is shown in Fig. 6.
(1) coding line
Coding line should be by synchronous head, remote terminal address field, transmission/received bit (T/R), subaddressing/mode field, number
It is formed according to word count/mode code field and parity check bit (P), wherein transmission/received bit (T/R), subaddressing/mode word
Section and data word count/mode code field are referred to as instruction segment, and transmission/received bit (T/R) determines to send or receive instruction,
As shown in Figure 7.
Synchronous head
Coding line synchronous head should be invalid Manchester waveform.Waveform at first 1.5 is positive, at latter 1.5
Waveform be negative.
Remote terminal address
It is remote terminal address section immediately following five after synchronous head.Each remote terminal is designated as a proprietary address,
It can be used from decimal address 0 to decimal address 30, but do not use decimal address 0 as the proprietary of remote terminal as far as possible
Address.Decimal address 31 (11111) is the public address of all remote terminals, is used when using broadcast operation for system.
Transmission/received bit
Transmission/received bit indicates the operation for requiring remote terminal to make, and logical zero assigning remote terminal is made to receive operation, logic 1
Assigning remote terminal is made to send operation.
Subaddressing/mode field
Subaddressing/mode field is used to specify the subaddressing of remote terminal, or is used as bus system ways of carrying out and controls
When label.
Data word count/mode code field
The field, which is used to specify remote terminal, should send, answer the number or mode code of received data word.
Parity check bit
Last of word is as preceding 16 even-odd checks, using odd.
(2) data word
Data word should be made of synchronous head, data field and parity check bit (P), wherein data field can also be called
Data segment, as shown in Figure 8.
Synchronous head
Data word synchronous head is invalid Manchester waveform.Waveform at first 1.5 is negative, wave at latter 1.5
Shape is positive.
Data segment
The data of 16 positions.
Parity check bit
Last of word is as preceding 16 even-odd checks, using odd.
(3) status word
Status word is by status word synchronous head, remote terminal address field, message error position, means of testing position, service request
Position, spare bit, broadcasting instructions received bit, busy bit, subsystem identification position, dynabus control receive position, end mark position and surprise
Even parity bit composition, wherein message error position, service request bit, spare bit, broadcasting instructions received bit, is hurried at means of testing position
Position, subsystem identification position, dynabus control receive position and end mark position and are referred to as state section, as shown in Figure 9.
Synchronous head
Status word synchronous head is identical as coding line synchronous head.
Remote terminal address field
The field has five, for the address of the remote terminal of transmission status word.It is corresponding that remote terminal address meets coding line
Regulation.
Message error position
For indicating that this remote terminal in preceding paid-in message, has a word or multiple words to survey not over validity
Examination.Logic 1 indicates that message has mistake, and logical zero indicates message zero defect.
Means of testing position
The position is always set to logical zero under all conditions.The position be can bit selecting be used to distinguish coding line or status word.Such as
Fruit uses, and the corresponding position in coding line is logic 1.
Service request bit
This indicates that this remote terminal needs to service.It is required that bus control unit starting is related with this remote terminal or subsystem
Predetermined operation.Logic 1 indicates service request, and logical zero indicates no service request.The position is can bit selecting.
Stand-by state position
Stand-by state position gives over to be used from now on, they should be set to logical zero.
Broadcasting instructions received bit
The position be logic 1 when indicate this remote terminal reception to upper effective instruction word be broadcasting instructions word.When being
When not using broadcast mode in system, setting the position is logical zero.
Busy bit
The position is that logic 1 indicates that remote terminal is in busy condition, cannot will be counted according to the instruction requirement of bus control unit
Data are taken out according to immigration subsystem or from subsystem.The position be can bit selecting, logical zero indicate be not present busy condition.
Subsystem identification position
For pointing out that there are subsystem fault states to bus control unit, and alerts this remote terminal of bus control unit and provide
Data may be invalid.The position is can bit selecting.Logic 1 indicates that subsystem fault, logical zero indicate no subsystem fault.
Dynabus receives position
If being set to logic 1, for indicating that this remote terminal receives to meet giving orders for defined dynabus control.Logical zero
Expression does not receive.The position is can bit selecting.
End mark position
The position is used as end mark function.Logic 1 indicates that there are failures inside this remote terminal, request bus control unit dry
In advance.Logical zero indicates that failure is not present.The position is can bit selecting.
Parity check bit
Odd is carried out to status word.
Message format
1553B bus message, which refers to, (or appears in remote terminal to remote terminal including a coding line, status word
Two coding lines, two status words when transmission), several data words (number of words is differed from 0 to 32) and condition responsive be spaced in
Interior transmission sequence.The message transmitted in bus should be consistent with ten kinds of following formats, should not use any other message lattice
Formula.
(1) transmission of the bus control unit to remote terminal
Bus control unit should issue data word that one receives coding line and defined amount to remote terminal, and the latter is verifying
After message, should send back to a status word should be sent out to controller, coding line and data word with the conitnuous forms of not interword space
Out, the transmission of controller to remote terminal is as shown in Figure 10.(note: " # " indicates that message interval, " * * " indicate corresponding interval)
(2) transmission of the remote terminal to bus control unit
Bus control unit should to remote terminal issue a transmission coding line, the remote terminal after verifying coding line,
A status word should be sent back to bus control unit, be followed by the data word of defined amount.Status word and data word should be not have
The conitnuous forms of interword space issue.The transmission of remote terminal to controller is as shown in figure 11.
(3) transmission of the remote terminal to remote terminal
Bus control unit should issue a reception coding line to remote terminal A, and then issue a hair to remote terminal B
Coding line is sent, remote terminal B should send a status word, be followed by the data word of defined amount after verifying coding line.Shape
State word and data word should be sent with the conitnuous forms of not interword space.It is when the data transfer ends that remote terminal B is issued and remote
A is after receiving the data word of defined amount for journey terminal, should be by regulation corresponding state word.Biography of the remote terminal to remote terminal
It is defeated as shown in figure 12.
(4) it is instructed without the mode of data word
Bus control unit should use defined mode code to issue a transmission coding line, the remote terminal to remote terminal
After verifying coding line, one status word of loopback, transformat is as shown in figure 13.
(5) mode with data word instructs (transmission)
Bus control unit should use defined mode code to issue a transmission coding line, the remote terminal to remote terminal
After verifying coding line, one status word of loopback is followed by one data word.Status word and data word should be between no words
Every conitnuous forms send.The mode of transmission belt data word instructs (transmission) as shown in figure 14.
(6) mode with data word instructs (reception)
Bus control unit should use defined mode code to issue a transmission coding line to remote terminal, be followed by one
Data word.Coding line and data word should be sent with the conitnuous forms of not interword space.The remote terminal verify coding line and
After data word, one status word of loopback is answered.The mode of transmission belt data word instructs (reception) as shown in figure 15.
(7) bus control unit transmits (broadcast) to the broadcast of each remote terminal
Bus control unit issues the reception coding line that a remote terminal address field is 11111, is followed by defined amount
Data word, coding line and data word should be sent with the conitnuous forms of not interword space.With reception broadcasting instructions ability
Each remote terminal after verification message, should by regulation in status word by broadcasting instructions received bit set, but not loopback state
Word.Controller is as shown in figure 16 to the broadcast of each remote terminal transmission.
(8) remote terminal is to each remote terminal transmission (broadcast)
Bus control unit should issue the reception coding line that a remote terminal address field is 11111, followed by using long-range
The proprietary address of terminal A issues a transmission coding line to remote terminal A.Remote terminal A answers loopback after verifying coding line
One status word, is followed by the data word of defined amount.Status word and data word should be sent out with the conitnuous forms of not interword space
It send.It should all be after verification message, by regulation with each remote terminal (in addition to remote terminal A) for receiving broadcasting instructions ability
By broadcasting instructions received bit set in status word, but not loopback status word.Remote terminal is to each remote terminal transmission (broadcast)
As shown in figure 17.
(9) (broadcast) is instructed without the mode of data word
Bus control unit should issue containing a mode code and remote terminal address field and instruct for 11111 transmission
Word.It should be after verifying coding line with each remote terminal for receiving broadcasting instructions ability, it will broadcast in status word by regulation
Command reception position position, but not loopback status word.Instruct (broadcast) as shown in figure 18 without the mode of data word.
(10) mode with data word instructs (broadcast)
Bus control unit should issue containing a mode code and remote terminal address field and instruct for 11111 reception
Word is followed by transmission one data word.Coding line and data word should be sent with the conitnuous forms of not interword space.With reception
Broadcasting instructions should be received position in status word by regulation after verification message by each remote terminal of broadcasting instructions ability
Position, but not loopback status word.Mode with data word instructs (broadcast) as shown in figure 19.
It is existing to generate the fault-signal needed using dedicated MIL-STD-1553B customization output data to more comprehensively
Entire bus system is tested, there are problems that poor universality.
The fault-signal simulator of MIL-STD-1553B bus node based on arbitrary-function generator, it includes appointing
Meaning function generator, failure adding module and MIL-STD-1553B level adapter,
Failure adding module passes through TekVISA software realization.And GUI panel is designed using LabWindows/CVI, it calculates
Cable, USB line or GPIB line can be used in the connection of machine and arbitrary-function generator,
Model AFG3252C, AFG3102 or 33250A that arbitrary-function generator uses,
Any wave generation function support reference frequency output 1mHz of the arbitrary-function generator of model AFG3252C ~
120MHz, effective analog bandwidth (- 3dB) 225MHz；
MIL-STD-1553B level adapter uses HI-1573 as MIL-STD-1553B protocol transceiver, and uses
555 timers complete the design of delay circuit,
Failure adding module, for inputting MIL-STD-1553B protocol groups word, in MIL-STD-1553B protocol groups word
Fault-signal is added, which generates data point；
The detailed process of the addition fault-signal are as follows:
The communication information in bus is write with 20 coding lines, 20 status words and 20 data words, according to event
Barrier demand adds one or more kinds of mistakes in coding line, status word and data word, constitutes MIL-STD-1553B bus section
The fault-signal of point；
Added in coding line mistake mode be included in synchronous head addition mistake, parity check bit addition mistake,
Instruction segment addition mistake and the addition Manchester's code mistake in every of coding line,
Added in status word mistake mode be included in synchronous head addition mistake, parity check bit addition mistake,
State section addition mistake and the addition Manchester's code mistake in every of status word,
Add in data words mistake mode be included in synchronous head addition mistake, parity check bit addition mistake,
Data segment addition mistake and the addition Manchester's code mistake in every of data word,
In order to realize the output of Manchester mistake, need arbitrary-function generator that there is depositing at least 80,000 data points
Energy storage power；
Arbitrary-function generator, for exporting MIL-STD-1553B signal waveform according to the data point of generation, by the waveform
It is sent to MIL-STD-1553B level adapter；
MIL-STD-1553B level adapter meets MIL- for the output signal of arbitrary-function generator to be changed into
Level standard as defined in STD-1553B agreement sends message to MIL-STD-1553B bus.
Claims (2)
1. the fault-signal simulator of the MIL-STD-1553B bus node based on arbitrary-function generator, it includes any
Function generator, failure adding module and MIL-STD-1553B level adapter,
Failure adding module is added in MIL-STD-1553B protocol groups word for inputting MIL-STD-1553B protocol groups word
Fault-signal, the protocol groups word generate data point；
The detailed process of the addition fault-signal are as follows:
The communication information in bus is write with 20 coding lines, 20 status words and 20 data words, according to failure need
It asks, one or more kinds of mistakes is added in coding line, status word and data word, constitute MIL-STD-1553B bus node
Fault-signal；
The mode that mistake is added in coding line is included in synchronous head addition mistake, adds Manchester's code in parity check bit
Mistake adds Manchester's code mistake in remote terminal address and adds Manchester's code mistake in instruction segment,
The mode that mistake is added in status word is included in synchronous head addition mistake, adds Manchester's code in parity check bit
Mistake adds Manchester's code mistake in remote terminal address and adds Manchester's code mistake in state section,
The mode for adding mistake in data words is included in synchronous head addition mistake, adds Manchester's code in parity check bit
Mistake and data segment add Manchester's code mistake,
Arbitrary-function generator sends the waveform for exporting MIL-STD-1553B signal waveform according to the data point of generation
Give MIL-STD-1553B level adapter；
MIL-STD-1553B level adapter meets MIL-STD- for the output signal of arbitrary-function generator to be changed into
Level standard as defined in 1553B agreement sends message to MIL-STD-1553B bus；It is characterized in that,
The external trigger function of arbitrary-function generator is utilized, the complete of mono- bus node of MIL-STD-1553B can be simulated
Whole message response process；
When MIL-STD-1553B level adapter is communicated with remote terminal, fault-signal simulator is total as one
Lane controller sends coding line to remote terminal, to simulate in MIL-STD-1553B bus communication bus control unit to remote
Journey terminal sends message；Transmission/received bit in instruction segment determines transmission/reception instruction, if transmission/received bit transmission is
Instruction is sent, arbitrary-function generator exports the coding line pre-seted using data point to remote terminal；If transmission/reception
What position was sent is to receive instruction, and the data of defined amount in instructing should be immediately received after fault-signal simulator reception coding line
Word；
When MIL-STD-1553B level adapter is communicated with bus control unit, fault-signal simulator is as one
Remote terminal, bus control unit send coding line to remote terminal, and MIL-STD-1553B level adapter is for detecting MIL-
The rising edge that coding line is sent in STD-1553B bus provides trigger signal to the external trigger input terminal of arbitrary-function generator,
So that arbitrary-function generator exports the status word and data word pre-seted using data point, to simulate MIL-STD-
The message that 1553B bus communication remote terminal is exported to bus control unit.
2. the fault-signal of the MIL-STD-1553B bus node according to claim 1 based on arbitrary-function generator
Simulator, which is characterized in that MIL-STD-1553B level adapter includes MIL-STD-1553B protocol transceiver and delay
Circuit,
MIL-STD-1553B protocol transceiver meets MIL-STD- for the output signal of arbitrary-function generator to be changed into
Level standard as defined in 1553B agreement sends message to MIL-STD-1553B bus；
Delay circuit is not answered within the period that arbitrary-function generator exports the status word and data word that preset for guaranteeing
Valid data edge is received again, avoids the bus response for generating mistake.
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| CN108334054B (en) * | 2018-01-30 | 2019-10-18 | 北京控制工程研究所 | A kind of control system data transmission availability test method and system for serving complicated 1553 bus networks |
| CN111209154B (en) * | 2020-01-02 | 2023-08-29 | 上海航天计算机技术研究所 | Method for realizing virtual 1553B bus equipment |
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