CN106645776A - Wheel speed collection system and method for airplane braking system - Google Patents
Wheel speed collection system and method for airplane braking system Download PDFInfo
- Publication number
- CN106645776A CN106645776A CN201611119874.4A CN201611119874A CN106645776A CN 106645776 A CN106645776 A CN 106645776A CN 201611119874 A CN201611119874 A CN 201611119874A CN 106645776 A CN106645776 A CN 106645776A
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- wheel speed
- collection
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- speed signal
- signal
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
Abstract
The invention discloses a wheel speed collection system and method for an airplane braking system, and the method comprises the following steps: S1, collecting a dual-redundancy wheel speed signal in a collection period; S2, converting the collected dual-redundancy wheel speed signal into two square wave signals, and respectively carrying out the counting; S3, respectively reading the two counting numbers, and determining whether the two counting numbers are the same or not through comparison: determining that the wheel signal collection is normal if the two counting numbers are the same, or else repeatedly carrying out the step S3, wherein the number n of repeated times of step S3 is n, and n is not greater than 10. The system comprises a dual-redundancy wheel speed signal collection module, a wheel speed signal conditioning module, a counting module, a reading module, a comparison module, a circulating module, and an obtaining module. According to the invention, the collected dual-redundancy wheel speed signal is read in one collection period for many times, and the dual-redundancy wheel speed signals are compared, thereby preventing the interference and time delay from causing the wrong obtaining of the wheel speed signals, and guaranteeing the collection accuracy of the wheel speed signals of the system.
Description
Technical field
The present invention relates to aircraft brake technology, more particularly, to the measuring wheel speed system and wheel speed of a kind of airplane brake system
Acquisition method.
Background technology
Wheel speed signal is the most important feedback signal of airplane brake system, and aircraft ABS system is by collection and computing wheel speed
Signal, detects the rolling condition of wheel, judges its slippery conditions, determines whether brakes needs to get off the brakes, to make full use of
The frictional force that ground can be provided, shorten braking distance, while improve the abrasion of tire, improve braking stationarity and safety
Property.
The general safety and reliability that system is improved using the remaining form of dual signal wheel speed sensors, and for double
Remaining signal accept or reject usual mode be which normally take which, all normally then take rule of thumb accept or reject, it is all abnormal, assign null value,
Or filtering using simple median filtering method or complex kalman, wavelet filtering to data, due to above-mentioned wheel speed
Easily there are mispick data in the collection of signal, causes wheel speed signal to be occasionally lost, and dual signal wheel speed sensors in high temperature,
, when low speed brakes, easily there are many interference signals more under rugged environment in vibration etc., cause undercarriage " walking " or
The weak phenomenon of low speed brake.
The content of the invention
It is an object of the invention to overcome above-mentioned technical deficiency, propose a kind of airplane brake system measuring wheel speed system and
Measuring wheel speed method, mispick easily occurs in wheel velocity signal capturing in solution prior art causes low speed walking, the technical problem of shake.
To reach above-mentioned technical purpose, technical scheme provides a kind of measuring wheel speed side of airplane brake system
Method, comprises the steps：
S1, in a collection period, the double remaining wheel speed signals of collection；
S2, double remaining wheel speed signals of collection are converted to into two square-wave signals, and two square-wave signals are carried out respectively
Count；
S3, read count twice respectively, compare whether reading twice is identical, wheel velocity signal capturing is normal if identical, if
Differ, then repeat step S3, and step S3 repeat step be n, n≤10.
Preferably, the measuring wheel speed method also includes step S4：The wheel speed letter of the two neighboring collection period collection of comparison
Number, and it is poor to calculate the wheel speed signal of two neighboring collection period collection, and wheel speed changes when judging braking according to wheel speed signal difference
It is whether normal.
Preferably, step S4 also includes arranging multiple range intervals, and the scope area being located at according to wheel speed signal difference
Between judge wheel speed intensity of anomaly.
Preferably, the computing formula of the wheel speed signal difference is：
D=| Yn+1-Yn|+If
Wherein, d be two neighboring collection period wheel speed signal it is poor, Yn+1For a upper collection period collection wheel speed signal,
YnFor the wheel speed signal of current collection period collection, IfFor abnormal regulation parameter.
Preferably, the step S3 reading is sixteen bit, sixteen bit number by low eight-digit number and high eight-bit array into.
Preferably, step S3 is to compare the low eight-digit number of reading twice.
Meanwhile, the present invention also provides a kind of measuring wheel speed system of airplane brake system, including：
Double remaining wheel velocity signal capturing modules, for the double remaining wheel speed signals for gathering aircraft in a collection period；
Wheel speed signal conditioning module, for double remaining wheel speed signals of collection to be converted to into two square-wave signals；
Counting module, for counting to two square-wave signals in real time；
Reading module, for reading two real-time countings of the counting module respectively；
Whether contrast module, two readings read for comparative reading module are identical；
Loop module, for driving reading module duplicate reading when two readings are different；
Acquisition module, for a wheel speed signal in the double remaining wheel speed signals of acquisition when two readings are identical as correspondence
The wheel speed signal of collection period.
Preferably, the measuring wheel speed system also includes the wheel speed signal for storing multiple different acquisition cycles collections
Memory module, for relatively more two neighboring collection period collection wheel speed signal wheel speed signal difference comparison module, for sentencing
The determination module of range intervals belonging to the disconnected wheel speed signal difference.
Compared with prior art, the present invention in a collection period by repeatedly reading the double remaining wheel speed signals for gathering
Repeatedly, and to each dual signal contrast, so as to avoid, because interference and time delay cause the mispick of wheel speed signal, which ensure that
The accuracy of airplane brake system wheel velocity signal capturing.
Description of the drawings
Fig. 1 is the collecting flowchart block diagram of the measuring wheel speed method of the airplane brake system of the present invention；
Fig. 2 is the attachment structure block diagram of the measuring wheel speed system of the airplane brake system of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, and
It is not used in the restriction present invention.
Fig. 1, Fig. 2 are referred to, The embodiment provides the measuring wheel speed system and wheel of a kind of airplane brake system
Fast acquisition method, measuring wheel speed method comprises the steps：
S1, in a collection period, the double remaining wheel speed signals of collection；
S2, double remaining wheel speed signals of collection are converted to into two square-wave signals, and two square-wave signals are carried out respectively
Count；
S3, read count twice respectively, compare whether reading twice is identical, wheel velocity signal capturing is normal if identical, if
Differ, then repeat step S3, and step S3 repeat step be n, n≤10；
S4, the wheel speed signal of the two neighboring collection period collection of comparison, and calculate the wheel of two neighboring collection period collection
Fast signal difference, and whether normal wheel speed changes when judging braking according to wheel speed signal difference.
Specifically, the present embodiment is by double in double remaining wheel velocity signal capturing module 1 Real-time Collection, one collection period
Remaining wheel speed signal, it is preferably acquired using dual signal wheel speed sensors, and the signal of its collection have passed through at remaining
Reason, two wheel speed signals of collection are nursed one's health by wheel speed signal conditioning module 2, and it mainly believes the wheel speed of approximate sine wave
Number conversion for ease of subsequent counter process square-wave signal, and the square-wave signal of conversion is then carried out real-time counting by counting module 3,
Count results are read out by reading module 4, and two that reading module 4 reads are compared by contrast module 5 after the completion of reading
Whether data are identical, and the identical wheel speed signal then started in two wheel speed signals of acquisition of acquisition module 6 is used as collection week
The wheel speed signal of phase, it is different then start loop module 7 carry out duplicate reading, until read two data it is identical, in order to ensure
Operation efficiency, the number of times for repeating to read is less than or equal to 10 times.
Wherein, the present embodiment reading module 4 may be configured as sixteen bit, and it specifically first reads low eight-digit number, then reads high by eight
Digit, and the low eight-digit number that then comparative reading module first reads of contrast module 5, when the corresponding low eight-digit number of two wheel speed signals
When identical, then illustrate that wheel velocity signal capturing is normal, and correspondence obtains the wheel speed signal of this collection period, when two wheel speed signals
During corresponding low eight-digit number difference, then starting loop module 7 carries out duplicate reading.Due to the present embodiment duplicate reading number of times highest
For 10 times, when 10 readings are not inconsistent requirement, then wheel speed signal is entered as into zero.
And in order to further improve the reliability and adaptability of wheel velocity signal capturing, it is to avoid interference signal enters measuring wheel speed
During, step S4 described in the present embodiment also includes arranging multiple range intervals, and the scope area being located at according to wheel speed signal difference
Between judge wheel speed intensity of anomaly, specially in braking, the difference of wheel speed signal that two neighboring collection period is gathered is carried out
Classification, for example, can arrange 0～m, m～m+20, m+20～m+40, m+40 with first-class several range intervals, and wherein m can be used as difference
Radix, for the ease of description, the present embodiment is illustrated using aforementioned four range intervals as four gears, 0～m correspondence a1
Shelves, m～m+20 correspondence a2 shelves, m+20～m+40 correspondence a3 shelves, more than m+40 correspondence a4 shelves.In order to ensure the degree of accuracy, the wheel
The computing formula of fast signal difference is：
D=| Yn+1-Yn|+If
Wherein, d be two neighboring collection period wheel speed signal it is poor, Yn+1For a upper collection period collection wheel speed signal,
YnFor the wheel speed signal of current collection period collection, IfFor abnormal regulation parameter.
When the difference of the wheel speed signal of two neighboring collection period collection is located at the interval range of a1 shelves, then wheel speed is illustrated
Signals collecting is normal, and it belongs to normal fluctuation range, when the collection of two neighboring collection period wheel speed signal difference more than poor
During value benchmark, then illustrate that the wheel speed signal for gathering occurs abnormal, and the difference of the wheel speed signal of two neighboring collection period collection
Bigger, its corresponding gear of value is higher, then specification exception degree is bigger, needs quickly through filter correction to avoid mispick.
It stores the normal wheel speed signal of multiple different acquisition cycle collections especially by memory module 8, that is, work as acquisition
When module 6 obtains the wheel speed signal of corresponding collection current period, it passes through comparison module 9 and believes with the wheel speed of a upper collection period
Number it is compared, and judges whether the wheel speed signal of current collection period collection is located at normal interval scope by determination module 10
It is interior, illustrate that the wheel speed signal of the collection period collection is normal if in the range of normal interval, otherwise by filter correction, together
When revised wheel speed signal can correspond to be stored in memory module 8, in order to compare with the wheel speed signal in subsequent acquisition cycle.
Compared with prior art, the present invention in a collection period by repeatedly reading the double remaining wheel speed signals for gathering
Repeatedly, and to each dual signal contrast, so as to avoid, because interference and time delay cause the mispick of wheel speed signal, which ensure that
The accuracy of airplane brake system wheel velocity signal capturing.
The specific embodiment of present invention described above, does not constitute limiting the scope of the present invention.Any basis
Various other corresponding change and deformation that the technology design of the present invention is made, should be included in the guarantor of the claims in the present invention
In the range of shield.
Claims (8)
1. a kind of measuring wheel speed method of airplane brake system, it is characterised in that comprise the steps：
S1, in a collection period, the double remaining wheel speed signals of collection；
S2, double remaining wheel speed signals of collection are converted to into two square-wave signals, and two square-wave signals are counted respectively；
S3, read count twice respectively, compare whether reading twice is identical, wheel velocity signal capturing is normal if identical, if not phase
Together, then repeat step S3, and step S3 repeat step is n, n≤10.
2. the measuring wheel speed method of airplane brake system according to claim 1, it is characterised in that the measuring wheel speed side
Method also includes step S4：The wheel speed signal of the two neighboring collection period collection of comparison, and calculate two neighboring collection period collection
Wheel speed signal it is poor, and according to wheel speed signal difference judge braking when wheel speed change it is whether normal.
3. the measuring wheel speed method of airplane brake system according to claim 2, it is characterised in that step S4 is also wrapped
The multiple range intervals of setting are included, and the range intervals being located at according to wheel speed signal difference judge wheel speed intensity of anomaly.
4. the measuring wheel speed method of airplane brake system according to claim 3, it is characterised in that the wheel speed signal is poor
Computing formula be：
D=| Yn+1-Yn|+If
Wherein, d be two neighboring collection period wheel speed signal it is poor, Yn+1For the wheel speed signal of upper collection period collection, YnFor
The wheel speed signal of current collection period collection, IfFor abnormal regulation parameter.
5. according to the measuring wheel speed method of the arbitrary described airplane brake system of Claims 1 to 4, it is characterised in that the step
Rapid S3 readings are sixteen bit, sixteen bit number by low eight-digit number and high eight-bit array into.
6. the measuring wheel speed method of airplane brake system according to claim 5, it is characterised in that step S3 is ratio
The lower eight-digit number of reading.
7. the measuring wheel speed system of a kind of airplane brake system, it is characterised in that include：
Double remaining wheel velocity signal capturing modules, for the double remaining wheel speed signals for gathering aircraft in a collection period；
Wheel speed signal conditioning module, for double remaining wheel speed signals of collection to be converted to into two square-wave signals；
Counting module, for counting to two square-wave signals in real time；
Reading module, for reading two real-time countings of the counting module respectively；
Whether contrast module, two readings read for comparative reading module are identical；
Loop module, for driving reading module duplicate reading when two readings are different；
Acquisition module, for a wheel speed signal in the double remaining wheel speed signals of acquisition when two readings are identical as correspondence collection
The wheel speed signal in cycle.
8. the measuring wheel speed system of airplane brake system according to claim 7, it is characterised in that the measuring wheel speed system
System is also included for storing the memory module of the wheel speed signal of multiple different acquisition cycle collections, for relatively more two neighboring collection
The comparison module of the wheel speed signal difference of the wheel speed signal of cycle collection, for judging range intervals belonging to wheel speed signal difference
Determination module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611119874.4A CN106645776B (en) | 2016-12-08 | 2016-12-08 | The measuring wheel speed system and measuring wheel speed method of airplane brake system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611119874.4A CN106645776B (en) | 2016-12-08 | 2016-12-08 | The measuring wheel speed system and measuring wheel speed method of airplane brake system |
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| CN106645776A true CN106645776A (en) | 2017-05-10 |
| CN106645776B CN106645776B (en) | 2019-07-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112378597A (en) * | 2020-10-28 | 2021-02-19 | 东软睿驰汽车技术（沈阳）有限公司 | Battery pack test analysis method, device and system |
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| CN103513062A (en) * | 2013-10-08 | 2014-01-15 | 潍柴动力股份有限公司 | Contrast test device of speed sensor |
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| DE2942891A1 (en) * | 1979-10-24 | 1981-05-07 | Bernhard Dipl.-Phys. 1000 Berlin Schallopp | Automatic revolution rate limit monitor for prime movers - has fail-safe circuit for checking pulse integral counter resetting |
| JP2000242631A (en) * | 1999-02-24 | 2000-09-08 | Chokosoku Network Computer Gijutsu Kenkyusho:Kk | Data conversion system |
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| CN103513062A (en) * | 2013-10-08 | 2014-01-15 | 潍柴动力股份有限公司 | Contrast test device of speed sensor |
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| CN112378597A (en) * | 2020-10-28 | 2021-02-19 | 东软睿驰汽车技术（沈阳）有限公司 | Battery pack test analysis method, device and system |
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| CN106645776B (en) | 2019-07-12 |
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