CN108871549A - Intelligent aircraft NVH test device, system and test method - Google Patents
Intelligent aircraft NVH test device, system and test method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The present invention relates to aircraft the field of test technology, specifically provide intelligent aircraft NVH test device, system and test method, the NVH test macro includes noise measurement module, vibration measurement module, data recordin module and host computer, noise measurement module for obtaining the noise data of aircraft in real time, vibration measurement module for obtaining the vibration data of aircraft in real time, the vibration data that data recordin module is used to store the noise data of noise measurement module acquisition and vibration measurement module obtains, host computer is used to carry out spectrum analysis to the noise data and vibration data and respectively obtains noise data curve and vibration data curve.The NVH test macro can intelligent real-time storage data, and show tracing analysis automatically, intuitive display data is as a result, mitigate tester's work load.
Description
Technical field
The present invention relates to aircraft the field of test technology, in particular to intelligent aircraft noise, vibration and sound vibration roughness
(Noise, Vibration, Harshness, NVH) test device, system and test method.
Background technique
With the development of science and technology and social progress, the intelligent aircraft of all parts of the world obtained high speed development in recent years.It makes an uproar
Sound is all the emphasis of major aircraft maker's research all the time.For consumers, the vibration of aircraft, noise and relax
One of main problem in need of consideration when appropriateness is purchase product.By NVH test can be used for detecting the vibration of aircraft with
Noise predicts that the fault rate of aircraft, and assessment vibration and noise are experienced to consumer's bring.
Currently, many manufacturers adopt due to still falling within the starting stage on the market for the NVH test macro of intelligent aircraft
NVH test is carried out to intelligent aircraft with auto NVH test macro, is had the disadvantage that：
1) equipment volume of auto NVH test macro and weight are larger, it is more difficult to be installed on require each component occupied space and
In weight aircraft small as far as possible；
2) portability of auto NVH test macro is poor, increases tester and tests burden；
3) test process of auto NVH test macro needs more manual operation, and intelligence degree is lower.
Summary of the invention
(1) goal of the invention
For the above-mentioned at least one defect having in the prior art for the NVH test macro of intelligent aircraft, this hair
It is bright to provide a kind of intelligentized aircraft NVH test device, system and test method, to shorten the failure row of intelligent aircraft
It looks into and the overall design period.
(2) technical solution
The present invention provides a kind of intelligent aircraft NVH test devices, including：
Noise measurement module, for obtaining the noise data of aircraft in real time；
Vibration measurement module, for obtaining the vibration data of aircraft in real time；And
Data recordin module communicates to connect respectively with the noise measurement module and the vibration measurement module, for depositing
Store up the noise data that the noise measurement module obtains and the vibration data that the vibration measurement module obtains.
As a specific embodiment in above-mentioned technical proposal, the noise data includes that the sense of hearing of noise is approximate
Value.
As a specific embodiment in above-mentioned technical proposal, the noise measurement module includes weighting network, institute
Weighting network is stated for obtaining the sense of hearing approximation.
As a specific embodiment in above-mentioned technical proposal, the weighting network includes A spectrum overlapping network, B
One of spectrum overlapping network, C spectrum overlapping network and Z spectrum overlapping network are a variety of.
As a specific embodiment in above-mentioned technical proposal, the weighting network further includes F time weighting network
With one of S time weighting network or a variety of.
As a specific embodiment in above-mentioned technical proposal, the sense of hearing approximation includes noise temporal weighted sound
Grade, maximum time weighted sound level, minimum time weighted sound level and peak C sound level.
As a specific embodiment in any of the above-described technical solution, the vibration data includes acceleration signal.
As a specific embodiment in any of the above-described technical solution, the vibration measurement module passes through acquisition aviation
The 3-axis acceleration data information of device obtains the acceleration signal.
As a specific embodiment in any of the above-described technical solution, the noise measurement module and data note
The sheathing material for recording module uses aluminium alloy.
The present invention also provides a kind of intelligent aircraft NVH test macros, including：
NVH test device described in any of the above-described technical solution；And
Host computer is logical with the noise measurement module, the vibration measurement module and the data recordin module respectively
Letter connection, for carrying out spectrum analysis to the noise data and the vibration data and respectively obtaining noise data curve and vibration
Dynamic data and curves.
As a specific embodiment in above-mentioned technical proposal, the host computer includes：
Storage unit, it is bent for storing the noise data, the vibration data, the noise data according to timing node
Line and the vibration data curve；And
Display unit, for showing the noise data curve and the vibration data curve.
The present invention also provides a kind of intelligent aircraft NVH test methods, including：
The noise data and vibration data of aircraft are obtained in real time；
The noise data and the vibration data are stored according to timing node；
Spectrum analysis is carried out to the noise data and the vibration data, noise data curve is obtained and vibration data is bent
Line；
The noise data curve and the vibration data curve are shown in the form of a graph.
As a specific embodiment in above-mentioned technical proposal, the noise data includes that the sense of hearing of noise is approximate
Value.
As a specific embodiment in above-mentioned technical proposal, pass through the one of which in following frequencies weighting network
Measure the sense of hearing approximation：A spectrum overlapping network, B spectrum overlapping network, C spectrum overlapping network and Z spectrum overlapping network.
As a specific embodiment in above-mentioned technical proposal, pass through the one of which in following time weighting network
The data measured to the spectrum overlapping network are further processed：F time weighting network and S time weighting network.
As a specific embodiment in above-mentioned technical proposal, the sense of hearing approximation includes noise temporal weighted sound
Grade, maximum time weighted sound level, minimum time weighted sound level and peak C sound level.
As a specific embodiment in any of the above-described technical solution, the vibration data includes acceleration signal.
As a specific embodiment in above-mentioned technical proposal, the acceleration signal passes through the three of acquisition aircraft
Axle acceleration data acquisition of information.
As a specific embodiment in any of the above-described technical solution, this method further includes：It is deposited according to timing node
Store up the noise data, the vibration data, the noise data curve and the vibration data curve.
(3) beneficial effect
Intelligence aircraft NVH test device, system and test method provided by the invention, have the advantages that：
1) vibration data and noise data of aircraft can be obtained automatically, and intelligence degree is higher；
2) it is capable of the test data of real-time storage acquisition, and shows tracing analysis automatically, intuitive display data is as a result, subtract
Light tester's work load.
Detailed description of the invention
It is exemplary below with reference to the embodiment of attached drawing description, it is intended to for the explanation and illustration present invention, and cannot manage
Solution is the limitation to protection scope of the present invention.
Fig. 1 is a kind of structural block diagram of embodiment of intelligent aircraft NVH test device provided by the invention；
Fig. 2 is a kind of structural block diagram of embodiment of intelligent aircraft NVH test macro provided by the invention；
Fig. 3 is a kind of flow chart of embodiment of intelligent aircraft NVH test method provided by the invention.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.
It should be noted that：Described embodiments are some of the embodiments of the present invention, instead of all the embodiments,
In the case where not conflicting, the features in the embodiments and the embodiments of the present application be can be combined with each other.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
Fig. 1 show a kind of structural block diagram of embodiment of intelligent aircraft NVH test device provided by the invention, should
NVH test device includes noise measurement module, vibration measurement module and data recordin module.Noise measurement module for obtaining in real time
Take the noise data of aircraft, in the present embodiment, noise data includes sense of hearing approximation of the human ear to noise.Vibration measurement module
For obtaining the vibration data of aircraft in real time, in the present embodiment, vibration data includes acceleration signal, it is to be understood that
Vibration measurement module obtains acceleration signal by acquiring 3-axis acceleration data information of the aircraft in flight course.Number
It is communicated to connect respectively with noise measurement module and vibration measurement module according to logging modle, for storing noise measurement module acquisition
The vibration data that noise data and vibration measurement module obtain, in order to operator's copy and later data analysis.It is advantageous
It is to include SD card (Secure Digital Memory Card) in data recordin module, noise data and vibration data storage
In SD card.It is understood that carrying out data acquisition using high-precision noise transducer and vibrating sensor, number can be improved
According to sampling precision, the higher noise data of accuracy and vibration data are obtained.
It should be noted that between noise measurement module and data recordin module, vibration measurement module and data record mould
Data transmission between block can use wired communication mode, can also use communication.It is preferred in the present embodiment
It is that between noise measurement module and data recordin module, wire communication is used between vibration measurement module and data recordin module
Serial interface communication in mode carries out data transmission, such as RS232 serial line interface etc..
In the present embodiment, noise measurement module includes weighting network, and weighting network is for obtaining sense of hearing approximation.For mould
Quasi- human auditory system has different sensitivitys in different frequency, and the weighting network being equipped in the circuit of noise measurement module can be simulated
The auditory properties of human ear are a kind of electric signal to be modified to the network being approximately worth with sense of hearing.It is measured by weighting network
Sound pressure level has no longer been the sound pressure level (linear sound pressure level) of objective physical amount, but passes through the modified sound pressure level of sense of hearing.
Above-mentioned weighting network includes A spectrum overlapping network, B spectrum overlapping network, C spectrum overlapping network and Z spectrum overlapping
One of network is a variety of, it can the one of which for only including four kinds of spectrum overlapping networks is also possible to therein two
Kind, three kinds or all four kinds.A spectrum overlapping network, B spectrum overlapping network, C spectrum overlapping network and Z spectrum overlapping network point
It is not one of weighting network of noise measurement module.Wherein, A spectrum overlapping network is that simulation human ear is low to 55 decibels or less
The frequency characteristic of intensity noise, and response of the simulation human ear to 40 side's pure tones in equal loudness contour, its curve shape and 340 sides
Equal loudness contour on the contrary, to make in electric signal, low-frequency range has biggish decaying.A sound level is higher, harm caused by noise
It is bigger.B spectrum overlapping network is the frequency characteristic of the moderate noise of 55 decibels to 85 decibels of simulation, and simulation human ear pair
The response of 70 side's pure tones, it makes the low-frequency range of electric signal have certain decaying.C spectrum overlapping network is simulation high intensity noise
Frequency characteristic, and response of the simulation human ear to 100 side's pure tones, there is almost straight response in entire audio range.Z frequency
Weighting network is the horizontal respone to frequency range 20Hz to 20KHz.In the present embodiment, above-mentioned weighting network includes simultaneously A
Spectrum overlapping network, B spectrum overlapping network, C spectrum overlapping network and Z spectrum overlapping network, can arbitrarily select when in use
Using which kind of spectrum overlapping network, the scope of application is increased.
Above-mentioned weighting network further includes one of F time weighting network and S time weighting network or whole, it can only
One of which including two kinds of time weighting networks is also possible to all two kinds.F time weighting network and S time weighting network
Network is two different time response modes, is that the data measured to spectrum overlapping network carry out time average treatment, makes noise
The measurement result of measurement module more can reflect the subjective feeling characteristic of people to a certain extent.Wherein, F time weighting network is
Fast time weighted, can be used for measuring steady-state noise, and the numerical value measured is virtual value.S time weighting network is slow time weighting network
Network can be used for measuring the biggish unstable state noise of fluctuation and traffic noise etc..In the present embodiment, above-mentioned weighting network is simultaneously
Include F time weighting network and S time weighting network, can be arbitrarily selected when in use using which kind of time weighting network,
Increase the scope of application.
In the present embodiment, above-mentioned sense of hearing approximation include noise temporal weighted sound level, maximum time weighted sound level Lmax,
Minimum time weighted sound level Lmin and peak C sound level LCpeak.
Advantageously, noise measurement module has automatic calibration function, it being capable of automatic correcting measuring zero point, measurement data standard
True property etc..
It is understood that the noise measurement module in the present embodiment can use sound level meter.
In the present embodiment preferably, the measurement 3-axis acceleration data information portion in vibration measurement module uses three axis
Acceleration transducer is realized.
Fig. 2 show a kind of structural block diagram of embodiment of intelligent aircraft NVH test macro provided by the invention, should
NVH test macro includes the NVH test device in above-mentioned NVH test device embodiment, i.e. noise measurement module, vibration measurement mould
Block and data recordin module, further include host computer, and host computer is remembered with noise measurement module, vibration measurement module and data respectively
Module communication connection is recorded, for carrying out spectrum analysis to noise data and vibration data and respectively obtaining noise data curve and vibration
Dynamic data and curves, to obtain NVH test result.It is understood that between host computer and noise measurement module, host computer and vibration
Data transmission between dynamic measurement module and between host computer and data recordin module can use wired communication mode, can also
To use communication.In the present embodiment preferably, between host computer and noise measurement module, host computer and vibration survey
Data between amount module and between host computer and data recordin module transmit the serial interface being all made of in wired communication mode
Port communications carry out data transmission, such as RS232 serial line interface etc..
In the present embodiment, host computer includes storage unit and display unit.Storage unit according to timing node for storing
The noise data curve that noise data and vibration data and host computer obtain after being classified to noise data and vibration data
With vibration data curve.Advantageously, can be convenient tester in this way carries out spectrum analysis, simultaneously for noise data and vibration
For dynamic data, storage unit and data recordin module form redundancy backup, prevent loss of data.Display unit is used for noise
Data and curves and vibration data curve are shown to user's viewing, and user can be by simply watching curve tendency, and judgement is tested
The vibrational state and sound size of position.
The shell mechanism material of noise measurement module and data recordin module uses aluminium alloy in the system, has intensity
Well, the advantages that light weight, the actual measurement weight of total system is less than 2Kg.Secondly, according to the size of each functional module pcb board,
Minimal design principle is used in size design, the size for the noise measurement module that final design goes out is：94 × 81 × 34mm, number
It is according to the size of logging modle：102 × 70 × 22mm, other similar products to compare on the market, such as the cDAQ- of NI company
The SCM2E02 acquisition system of 9181 data collection systems, the PAKMKII series acquisition system of BBM company and LMS company, this hair
The test macro of bright offer has the advantages that light-weight, small in size, to be easy to carry about with one.
Fig. 3 show a kind of flow chart of embodiment of intelligent aircraft NVH test method provided by the invention, this method
Include the following steps：
Step 101, the noise data and vibration data of aircraft are obtained in real time.
In the present embodiment, noise data includes sense of hearing approximation of the human ear to noise, and vibration data includes acceleration signal,
It is understood that acceleration signal is obtained by the 3-axis acceleration data information of acquisition aircraft.And in the present embodiment,
Noise data includes the sense of hearing approximation of noise.In the present embodiment preferably by the one of which in following frequencies weighting network come
Measure sense of hearing approximation：A spectrum overlapping network, B spectrum overlapping network, C spectrum overlapping network and Z spectrum overlapping network.Meanwhile
Also the data of the spectrum overlapping network measure are further processed by the one of which in following time weighting network：F
Time weighting network and S time weighting network.The data progress time that time weighting network measures spectrum overlapping network is average,
The measurement result of noise measurement module is set more to can reflect the subjective feeling characteristic of people to a certain extent.It is understood that
Sense of hearing approximation includes noise temporal weighted sound level, maximum time weighted sound level, minimum time weighted sound level and peak C sound level.
It should be noted that after being powered to NVH system, data measurement module (noise measurement module and vibration in system
Measurement module) noise data and vibration data that aircraft can be automatically picked up, complicated cumbersome behaviour is carried out without tester
Make.
Step 102, noise data and vibration data are stored according to timing node.
Data measurement module can be by collected noise data and vibration data intermediate node storage on time to data record mould
In block, at the same also real-time storage into system in the storage unit of host computer.Specifically, host computer receives noise data and vibration
After dynamic data, accurately data are recorded in the storage unit of host computer according to time node by labview program, herein
Complicated cumbersome operation is carried out without tester, wherein storage unit can be storage card.
Step 103, spectrum analysis is carried out to noise data and vibration data, obtains noise data curve and vibration data is bent
Line.
Host computer carries out spectrum analysis to noise data and vibration data by labview program, obtains noise data
Curve and vibration data curve.In the present embodiment, after obtaining noise data curve and vibration data curve, pass through host computer
Noise data, vibration data, noise data curve and vibration data song are stored according to timing node by labview program
Line.
Step 104, display noise data and curves and vibration data curve in the form of a graph.
After obtaining noise data curve and vibration data curve, the display unit of host computer is in real time by noise data curve
It shows with vibration data curve and is watched for operator automatically, operator can judge measured position by watching curve tendency
The vibrational state and sound size set.From the foregoing, it will be observed that tester is only responsible for need to be to system energization in the NVH test method, it
Afterwards data acquisition, data analysis etc. be all intelligently to automatically derive or generate.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of protection of the claims
It is quasi-.
Claims (10)
1. a kind of intelligence aircraft NVH test device, which is characterized in that including：
Noise measurement module, for obtaining the noise data of aircraft in real time；
Vibration measurement module, for obtaining the vibration data of aircraft in real time；And
Data recordin module communicates to connect respectively with the noise measurement module and the vibration measurement module, for storing
The vibration data that the noise data and the vibration measurement module for stating noise measurement module acquisition obtain.
2. NVH test device according to claim 1, which is characterized in that the noise data includes that the sense of hearing of noise is close
Like value.
3. NVH test device according to claim 2, which is characterized in that the noise measurement module includes weighting network,
The weighting network is for obtaining the sense of hearing approximation.
4. NVH test device according to claim 3, which is characterized in that the weighting network includes A spectrum overlapping net
One of network, B spectrum overlapping network, C spectrum overlapping network and Z spectrum overlapping network are a variety of.
5. a kind of intelligence aircraft NVH test macro, which is characterized in that including：
NVH test device described in any claim in Claims 1-4；And
Host computer, respectively with the noise measurement module, the vibration measurement module and the data recordin module communication link
It connects, for carrying out spectrum analysis to the noise data and the vibration data and respectively obtaining noise data curve and vibration number
According to curve.
6. NVH test macro according to claim 5, which is characterized in that the host computer includes：
Storage unit, for according to timing node store the noise data, the vibration data, the noise data curve with
And the vibration data curve；And
Display unit, for showing the noise data curve and the vibration data curve.
7. a kind of intelligence aircraft NVH test method, which is characterized in that including：
The noise data and vibration data of aircraft are obtained in real time；
The noise data and the vibration data are stored according to timing node；
Spectrum analysis is carried out to the noise data and the vibration data, obtains noise data curve and vibration data curve；
The noise data curve and the vibration data curve are shown in the form of a graph.
8. NVH test method according to claim 7, which is characterized in that the noise data includes that the sense of hearing of noise is close
Like value.
9. NVH test device according to claim 8, which is characterized in that by following frequencies weighting network wherein
A kind of measurement sense of hearing approximation：A spectrum overlapping network, B spectrum overlapping network, C spectrum overlapping network and Z spectrum overlapping net
Network.
10. NVH test method according to claim 9, which is characterized in that this method further includes：It is deposited according to timing node
Store up the noise data, the vibration data, the noise data curve and the vibration data curve.
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Cited By (1)
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| CN112461552A (en) * | 2020-11-16 | 2021-03-09 | 上海拿森汽车电子有限公司 | Detection method and system of electronic power-assisted brake system and readable storage medium |
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