CN106656961B - Flying quality based on ARINC767 specification decodes analysis method - Google Patents
Flying quality based on ARINC767 specification decodes analysis method Download PDFInfo
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- CN106656961B CN106656961B CN201610864268.9A CN201610864268A CN106656961B CN 106656961 B CN106656961 B CN 106656961B CN 201610864268 A CN201610864268 A CN 201610864268A CN 106656961 B CN106656961 B CN 106656961B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/26—Special purpose or proprietary protocols or architectures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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Abstract
The invention discloses a kind of flying qualities based on ARINC767 specification to decode analysis method, completes decoding according to the data record feature that ARINC767 is standardized for the suitable decoding library of flying quality matching.User is not necessarily to carry out deep understanding to data structure and decoding library type, and decoding analysis method of the invention can constantly try to, until decoding finishes.After trial and error decoding success, current configuration can be updated backstage preset configuration can save a large amount of trial and error decoding time and human configuration time when handling a large amount of isomorphism type data.
Description
Technical field
The present invention relates to technical field of aerospace, and in particular to a kind of flying quality decoding analysis based on ARINC767 specification
Method.
Background technique
Traditional flight data recording specification ARINC573/ARINC717/ARINC747, based on subframe, each
Subframe is one second, and 4 subframes constitute a frame, and word slot is 12 data bit.Novel 787 aircraft, has abandoned subframe, word completely
The concepts such as slot, super frame introduce a kind of new data record specification ARINC767.On the basis of parameter acquisition frequency, it will join
Number grouping, the grouping are known as " frame (Frame) ", and the synchronization character of frame is EB90, and the parameter in each frame is same acquisition speed
Rate, and journal, without the concept of word slot.One frame is also no longer one second, and is the introduction of " timestamp " (time
Stamp concept), to judge sequence and the record time of each frame.
The decoding for the data that traditional decoding software cannot support ARINC767 to standardize needs to establish a kind of new calculation
Method, with the perfect decoding for adapting to new types of data.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of flying qualities based on ARINC767 specification
Analysis method is decoded, to adapt to the flying quality standardized based on ARINC767.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of flying quality decoding analysis method based on ARINC767 specification, comprising steps of
Obtain the flying quality standardized based on ARINC767；
The synchronization character of flying quality is searched, the frame ID after extracting synchronization character；
Aircraft number is parsed according to the filename of flying quality, calls the supplemental characteristic of initial configuration corresponding with aircraft number
Library；
The length that frame ID is corresponded in the length characteristic of all frame ID of flying quality and the parameter database of initial configuration is special
Sign compares, and is decoded according to the parameter database of initial configuration to flying quality if consistent, if inconsistent replace one by one
The parameter database of other versions, until corresponding to frame ID in the length characteristic of all frame ID of flying quality and parameter current database
Length characteristic it is consistent, with the parameter database of parameter current database replacement initial configuration, and according to parameter current database
Flying quality is decoded；
According to the various parameters decoded out, carries out segment and divide and airport matching.
Compared with prior art, the beneficial effects of the present invention are:
For the decoding software of mainstream when being decoded, the mistake of any point setting can all lead to the failure of decoding at present,
The change of aircraft configuration also results in data decoding and can not carry out.User needs the configuration current to decoding principle and aircraft to have
Careful understanding could complete the setting to backstage, this needs largely to train user of service in certain degree,
Increase use cost.The data record feature that the present invention is standardized according to ARINC767 decodes library for flying quality matching is suitable,
Complete decoding.User is not necessarily to carry out deep understanding, decoding analysis method meeting of the invention to data structure and decoding library type
It constantly tries to, until decoding finishes.After trial and error decoding success, current configuration can be updated backstage preset configuration, located
When managing a large amount of isomorphism type data, a large amount of trial and error decoding time and human configuration time can be saved.
Detailed description of the invention
Fig. 1 is that the flying quality standardized the present invention is based on ARINC767 decodes the flow diagram of analysis method.
Specific embodiment
The present invention is further illustrated With reference to embodiment.
The purpose of decoding is to convert identifiable engineering value for binary flight data file.Due to being based on
The flying quality of ARINC767 specification and traditional entirely different, so also difference is very big for the algorithm decoded.
The present invention is based on the flying qualities of ARINC767 specification to decode analysis method, as shown in Figure 1, comprising steps of
Step s101, the flying quality standardized based on ARINC767 is obtained.
Flying quality refers to that the flying quality downloaded from airplane data record system, format are binary file.For
787 aircrafts, flying quality share 3 classes, and one kind is EAFR (the Enhanced Airborne by maintenance notebook ML downloading
Flight Recorder) data, one kind is to be synchronized to LSAPL (Loadable Software Airplane Part
Librarian can load aircraft software components library) CPL (Continuous Parameter Logging) data on server,
Another kind of is the CPL data by TCU (Terminal Cellular Unit) using wireless network transmissions to ground-based server.
These three types of data can read in calculator memory by automatic or manual mode.
Step s102, the synchronization character of flying quality is searched, the frame ID after extracting synchronization character.
Find EB90 synchronization character, and to after synchronization character frame ID and frame length etc. do validity check, take out the time of frame
Stab TimeStamp.
Step s103, aircraft number is parsed according to the filename of flying quality, calls initial configuration corresponding with aircraft number
Parameter database.
Flying quality can parse some very important information due to the normalization of its name from filename, like flying
Machine number, data download time etc., in order to subsequent data processing.
Step s104, the length in the parameter database of the length characteristic of all frame ID of flying quality and initial configuration is special
Sign compares, and is decoded according to the parameter database of initial configuration to flying quality if consistent, if it is inconsistent call it is adaptive
The trial and error decoding subalgorithm answered.
Since the aircraft factory chamber of commerce irregularly updates the database software in relation to flight record, so the ginseng for decoding
Number database also has corresponding multiple versions, and the purpose of trial and error decoding subalgorithm is successively to call all preset parameter databases
It is decoded, until finding matched database.Specifically, when the length characteristic of all frame ID of flying quality with initially match
When the length characteristic in parameter database set is inconsistent, the parameter database of other versions is replaced one by one, until flying quality
The length characteristic of all frame ID is consistent with the length characteristic in parameter current database, is initially matched with the replacement of parameter current database
The parameter database set, and according to the frame ID parameter for being included and the occupied length of parameter, using parameter database successively into
Row decoding, is converted to engineering value for binary flying quality.Alarm is popped up if all parameter databases all attempt failure
Information.
Step s105, it according to the various parameters decoded out, carries out segment and divides and airport matching.
Since original flying quality is all that continuous recording, all segment all blends together, one is formed continuously
Binary file.The first purpose of decoding exactly decodes Partial key parameter in advance, such as vacant lot electric switch, UTC, fuel oil
Binary file is divided into complete one by one by flow, pressure altitude, radio altitude, ground velocity etc. according to the variation of these parameters
Whole segment file.The division of segment is also always a difficult point during decoding.Such as the unexpected missing of data record, touching
Ground goes around, this training etc. can all divide segment and interfere, and influences the accuracy divided.Innovative introducing of the invention
Privilege level concept, after the data analysis for combining a large amount of true segments, a kind of perfect segment of comparison for obtaining divides solution
Certainly scheme.
After detecting vacant lot electric switch by switching to ground in the air, activation segment partitioning algorithm monitoring is carried out according to priority
Segment divides.
Highest priority: if radio altitude becomes 0, ground velocity 0 monitors after the fuel flow of two hairs also becomes 0
The variation of UTC time, if there is breakpoint, then complete machine has powered off after illustrating boat, and aircraft does not re-record data, at this time to segment
Progress cutting is ideal, and the purpose of segment cutting is to find the separation of optimal previous segment and the latter segment.
Second level priority: if the first situation is not present, such as some flights that miss the stop, will not power off during missing the stop, this
When press the second priority, monitor fuel flow be 0 after i.e. progress cutting.
Three-level priority: if it is this training, landing training is repeated in aircraft, then second situation will not deposit
Segment cutting is being carried out before take off next time at this time.
Special priority: having some special data, and for some reason, flying quality is lost, for example certain segment data is just
Journey, unexpected data outage are flown over flat, next second has directly arrived the data before another segment is taken off.Such case should just supervise
Discontinuous point and height and fuel flow when control carry out segment cutting by abnormal special priority near breakpoint.
The advantages of above-mentioned segment partitioning algorithm: almost all of segment data are adapted to and are divided, and always with optimal side
Formula carries out cutting, can shield interference of the special circumstances such as loss of data to algorithm, accurately divide segment.
The parameter of flight data recording does not have take-off and landing airport, only longitude and latitude parameter.Therefore, when data analyze
When takeoff point and landing point, need to match immediate airport name in preset Global Airports database according to longitude and latitude.Together
Often there is the case where matching error, such as the airport on Seattle airport and Boeing base, the two when matching airport in class software
It is spaced closely together, if algorithm not enough optimizes, it is easy to matching error.The present invention uses Allowance Design, and reserved tolerance interface,
User can directly modify.
By interface function, user setting tolerance is obtained；
Preset airport database is traversed, according to longitude and latitude tolerance, filters out most possible airport list；
Difference of longitude and latitudinal difference are calculated separately, takes the smallest airport of comprehensive deviation as final matching airport.
The advantages of above-mentioned algorithm, is that user can adjust tolerance, can correct the knot of decoding by reserved interface
Fruit.The calculated longitude and latitude because airplane inertial navigates, can have certain deviation, if pilot not in time carries out inertial navigation
Correction, cumulative errors can be increasing, is finally possible to airport matching error.And the tolerance of this algorithm, allow user to carry out
Amendment.
It flies into nearly vertical section, is a new proposition, in previous domestic and international decoding system, do not referred to and real
It is existing.The present invention will fly into each location point near procedure, is projected on the vertical guide Chong Die with runway centerline, then draws
LOC guidance station and GS guidance station processed intersect best near line.The realization of such algorithm greatly improves the effect of data analysis
Rate and accuracy, have intuitively reproduced flying scene very much.
Algorithm details:
Obtain the distance into nearly runway head to blind landing platform from related approach, into the longitude and latitude of proximal end runway head, into it is close when run
The pressure altitude in road, VOR (VHF OMNI-DIRECTIONAL RANGE VHF Omnidirection range) into it is close when each obstacle detouring point away from
From and height etc. information；
Using Approach End of Runway entrance as the origin of reference axis, X-axis be plane distance runway head into proximal end floor projection away from
From Y-axis is height of the aircraft relative to runway；
If it is ILS (Instrument landing system instrument-landing-system) into close, the transmitting of blind landing platform is drawn
3 degree or 5 degree near line, are subject to the practical announcement data in airport；
If it is NDB (Non-Directional Beacon Non Direction Beason) into close, each obstacle detouring point and its height are drawn；
Current aircraft longitude and latitude is calculated at a distance from runway threshold longitude and latitude, the height in conjunction with aircraft with respect to airport plane is drawn
Aircraft profile line processed.
Aircraft intuitively presents the location of aircraft into the drafting of nearly vertical section very much, aircraft altitude, and into close
Relative position of line etc. can be analyzed for data, and flight quality monitoring saves a large amount of time.
All after decoding, it will be saved in decoding information and warning information write-in background data base, save necessary day
Will, backup significant data etc..
Above-mentioned algorithm includes the following aspects to the improvement of business after realizing:
1, the complexity in user's use is alleviated
When data decoding, user is not necessarily to know the corresponding parameter database of frame format of current original flying quality, this hair
It is bright to attempt various parameters database automatic code translation, and the parameter library of current trial and success can be saved, Shi Huizhi is decoded next time
Connect calling.This mode can reduce the complexity that software uses, and reduce software and use the training time.
2, algorithm is increased income, and it is high that user customizes degree
User can analyze logic of propositions, parameter database secondary development to data, write analysis in their own needs and patrol
Volume, event-monitoring and super-limit prewarning, improve data user rate.Data can be provided and supported for aircraft maintenance and flight quality, in time
Each system of early warning transfinites, in advance troubleshooting, reduces aircraft and stops field time.
3, data analysis process is simplified
Parameter engineering value after decoding is shown in friendly way, and diagram curve mode is supported to show, intuitive convenient for user
Judgement Parameter Variation.It supports flying quality importing Online Map simultaneously, draws complete segment flight path, draw
Flight vertical section when aircraft leaves the theatre or marches into the arena, user can effectively judge flight there are the problem of, save analysis time,
Simplified analysis process.
4, use cost is saved
Existing decoding system, after aircraft configuration change or Airborne Software update, original decoding data library is no longer suitable
With, even subtle variation, requires to purchase new decoding library again, expends a large amount of fund.The present invention can support to use
Producer's file is directly converted into new decoding library, greatly shortening update and solving the problems, such as by the customized creation modification in family
Period, saved the cost used.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and the embodiment is not to limit this hair
Bright the scope of the patents, all equivalence enforcements or change without departing from carried out by the present invention, is intended to be limited solely by the scope of the patents of this case.
Claims (3)
1. a kind of flying quality based on ARINC767 specification decodes analysis method, which is characterized in that comprising steps of
Obtain the flying quality standardized based on ARINC767；
The synchronization character of flying quality is searched, the frame ID after extracting synchronization character；
Aircraft number is parsed according to the filename of flying quality, calls the parameter database of initial configuration corresponding with aircraft number；
The length characteristic ratio of frame ID will be corresponded in the length characteristic of all frame ID of flying quality and the parameter database of initial configuration
Compared with being decoded according to the parameter database of initial configuration to flying quality if consistent, if inconsistent replace other one by one
The parameter database of version, until corresponding to the length of frame ID in the length characteristic of all frame ID of flying quality and parameter current database
Degree feature is consistent, the parameter database of initial configuration is replaced with parameter current database, and according to parameter current database to winged
Row data are decoded；
According to the various parameters decoded out, segment division and airport matching are carried out,
The segment divide the step of include:
The various parameters decoded out are monitored, after vacant lot electric switch is by switching to ground in the air, according to following priority to flying quality
Carry out segment division:
Highest priority: when radio altitude is 0, ground velocity 0, the fuel flow of all engines is 0, and UTC time occurs
When breakpoint, cutting is carried out to segment；
Second level priority: cutting is carried out to segment when fuel flow is 0；
Three-level priority: segment cutting is carried out before taking off next time；
Special priority: when flying quality interrupts, segment cutting is carried out in UTC time breakpoint,
The airport match the step of include:
The longitude and latitude of takeoff point or landing point is extracted from the parameter decoded out；
By interface function, the matched longitude and latitude tolerance in airport of user setting is obtained；
Preset airport longitude and latitude database is traversed, filters out and the longitude and latitude deviation of takeoff point or landing point is in longitude and latitude tolerance
Airport list in range；
Difference of longitude and latitudinal difference are calculated separately, takes the smallest airport of comprehensive deviation as final matching airport.
2. the flying quality according to claim 1 based on ARINC767 specification decodes analysis method, which is characterized in that translate
It also flies after code into the drafting of nearly vertical section, step includes:
Obtain distance of the runway head into proximal end to blind landing platform, runway head into proximal end longitude and latitude, into it is close when runway pressure altitude,
And VOR into it is close when each obstacle detouring point distance and height；
Using Approach End of Runway entrance as the origin of reference axis, X-axis is floor projection distance of the plane distance runway head into proximal end, Y
Axis is height of the aircraft relative to runway；
If it is ILS into close, draw the transmitting of blind landing platform near line；
If it is NDB into close, each obstacle detouring point and its height are drawn in a coordinate system；
The current longitude and latitude of aircraft and runway head are calculated at a distance from the longitude and latitude of proximal end, is drawn in conjunction with the height of aircraft airport plane relatively
Aircraft processed is into nearly vertical section line.
3. the flying quality according to claim 1 based on ARINC767 specification decodes analysis method, which is characterized in that also
Comprising steps of
In seconds, by the frame after decoding according to timestamp ordering.
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| CN108016610B (en) * | 2017-12-13 | 2020-12-29 | 浙江黎盛新材料科技有限公司 | Aircraft with buffer structure and working method |
| CN110782549B (en) * | 2019-09-06 | 2022-03-22 | 中国商用飞机有限责任公司 | ARINC767 specification-based flight recorder data decoding method and system |
| CN110990470A (en) * | 2019-11-19 | 2020-04-10 | 深圳市比一比网络科技有限公司 | QAR data decoding method, system and storage medium based on distributed computation |
| CN114884928A (en) * | 2022-04-18 | 2022-08-09 | 中国民航科学技术研究院 | EAFR data downloading processing method and system of in-process computer type C919 |
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