CN107832483A - Diesel engine noise method for evaluating quality based on UDS and AHP - Google Patents
Diesel engine noise method for evaluating quality based on UDS and AHP Download PDFInfo
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Abstract
The present invention relates to a kind of diesel engine noise method for evaluating quality based on UDS and AHP, including：Step a, according to the various influence factors for influenceing diesel engine noise, each factor of diesel engine noise quality overall merit is obtained, establishes the hierarchical structure model of diesel engine noise quality evaluation；Step b, each factor of diesel engine noise quality overall merit obtained according to above-mentioned steps a, corresponding weight is assigned to each factor；Step c, simplify the hierarchical structure model of above-mentioned steps a foundation using UDS tables；Step d, to sound quality subjective assessment；Step e, the Consideration that the sound quality numerical value obtained by above-mentioned steps d obtains with step c hierarchical structure models are evaluated.The present invention solve traditional Paired Comparisons be difficult to sound quality subjective assessment test in obtain evaluation object overall feeling preferentially sort；Overcome noise qualities evaluation method and need much noise sample, can not accurate evaluation, the problems such as being difficult to effectively sort.
Description
Technical field
The present invention implements to be related to diesel engine noise quality evaluation technical field, more particularly to a kind of bavin based on UDS and AHP
Oil machine noise qualities evaluation method.
Background technology
With the fast development of diesel engine industry, people include diesel engine to the noise requirements more and more higher of diesel engine
The Main Noise Sources such as automobile, generating set are also diesel engine.Traditional noise-reduction method can not meet people's requirement, therefore mesh
Preceding numerous studies emphasis, which concentrates on, improves diesel engine sound quality.
Sound quality is a kind of subjective feeling, it is necessary to establish sound quality for the subjective feeling of diesel engine noise according to user
Evaluation criterion.The evaluation method both at home and abroad on sound quality has many defects at present, and traditional noise qualities evaluation method is difficult to
The overall preferentially sequence of evaluation object is obtained in sound quality evaluation test, and for this complicated machinery of diesel engine, its shadow
The factor of sound is numerous, and subjective assessment model hierarchy is complicated, can not carry out effective evaluation.
Therefore, it is necessary to a kind of new diesel engine sound quality subjective evaluation method.
The content of the invention
It is an object of the invention to provide a kind of diesel engine noise method for evaluating quality based on UDS and AHP, to overcome
In the prior art noise qualities evaluation method need much noise sample, can not accurate evaluation, the problems such as being difficult to effectively sort.
To achieve the above object, the present invention provides a kind of diesel engine noise method for evaluating quality based on UDS and AHP, bag
Include：
Step a, according to influence diesel engine noise various influence factors, obtain diesel engine noise quality overall merit it is each because
Element, establish the hierarchical structure model of diesel engine noise quality evaluation；
Step b, each factor of diesel engine noise quality overall merit obtained according to above-mentioned steps a, each factor is assigned
Corresponding weight；
Step c, simplify the hierarchical structure model of above-mentioned steps a foundation using UDS tables；
Step d, to sound quality subjective assessment；
Step e, the consideration obtained by the sound quality numerical value that above-mentioned steps d is obtained with step c hierarchical structure models
Factor is evaluated.
Further, in above-mentioned steps a, when obtaining the various influence factors for influenceing diesel engine noise, binding tests bar
Each attribute or performance of part and conventional practical experience analyzing influence evaluation diesel engine noise quality；Various shadows based on acquisition
The factor of sound, obtain evaluating diesel engine noise quality overall merit set of factors；By the way that the overall merit set of factors of above-mentioned acquisition is drawn
It is divided into different levels, to form above-mentioned hierarchical structure model.
Further, in above-mentioned steps a, diesel engine noise quality overall merit factor comprises at least：Diesel engine speed, bear
Lotus and point position.
Further, in above-mentioned steps b, according to influence journey of each factor of evaluation of diesel engine noise quality to noise quality
Degree, using the enabling legislation based on Ordering Preferences, corresponding weight is assigned to each factor, and turn into factorial power sets.
Further, in above-mentioned steps b, the tax power method based on Ordering Preferences is to be based on Bradlley-Tery models,
Preference matrix is obtained, obtain certain factor of evaluation using Preference matrix determines factor of evaluation extremely relative to the weight sets of destination layer
It is less：Diesel type, point position, rotating speed, load.
Further, in above-mentioned steps c, UDS method for simplifying is：
For fixed positive integer n and m, uniform design generation vector (n is chosen；h1,…,hm), orderClaim point set Rn={ ci=(ci1,…,cij), i=1 ..., n } it is uniformly to set
Count UD；
From multinomial distributionM sample η of middle extraction1,…,ηm, and make
Wherein υijWith ηj, j=1 ..., m it is independent and for fromUpper equally distributed sample；{ } represents decimal
Part；Claim point set Pn={ xi=(xi1,…,xij), i=1 ..., n } it is Uniform Design Sampling And Its.
Further, in above-mentioned steps e, according to hierarchical model is simplified, to the subjective evaluation result of noise sample with examining
Worry factor carry out correlation analysis, to judge the relation between Consideration and sound quality, it is determined that be it is linear or non-linear,
It is independent or interactional；
Verify that this method carries out subjective assessment experiment according to grade scale grade scoring method to whole samples, obtain evaluation knot
Fruit, the two preferentially ranking results and standardization result are contrasted, verifies this method accuracy.
The beneficial effects of the present invention are the diesel engine noise product of the invention based on UDS and AHP compared with prior art
Matter evaluation method, solve traditional Paired Comparisons and be difficult to obtain evaluation object associative perception in sound quality subjective assessment is tested
Preferentially sorted；Overcome current noise qualities evaluation method need much noise sample, can not accurate evaluation, be difficult to effectively arrange
The problems such as sequence.Available for implement different diesel oil and or n times improve the sound quality of experiment and compare and judge.
Further, this method possesses following characteristics compared to conventional method：Required noise sample is few, and evaluation result is accurate
Really, calculating speed is fast.
Further, Uniform Design Sampling And Its, analytic hierarchy process (AHP) etc. are incorporated in noise qualities and commented by method proposed by the present invention
In valency method；This method employs and the weighing computation method based on Ordering Preferences and Bradley-Terry models simultaneously, we
The weight calculation result of method has more preferable uniformity, ensure that the result of calculation stability of this method.
Brief description of the drawings
Fig. 1 is the flow diagram of the diesel engine noise method for evaluating quality embodiment of the invention based on UDS and AHP；
Fig. 2 is the overall merit factor of the diesel engine noise method for evaluating quality embodiment of the invention based on UDS and AHP
Collection；
Fig. 3 is the layer that the UDS tables of the diesel engine noise method for evaluating quality embodiment of the invention based on UDS and AHP simplify
Secondary structural model schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the forgoing and additional technical features and advantages are described in more detail.
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining the technical principle of the present invention, it is not intended that limit the scope of the invention.
It should be noted that in the description of the invention, the instruction such as term " on ", " under ", "left", "right", " interior ", " outer "
Direction or the term of position relationship be to be based on direction shown in the drawings or position relationship, this is intended merely to facilitate description, and
It is not instruction or implies that described device or element there must be specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.
In addition it is also necessary to explanation, in the description of the invention, unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.To those skilled in the art, it can understand that above-mentioned term exists as the case may be
Concrete meaning in the present invention.
As shown in fig.1, it is respectively the diesel engine noise method for evaluating quality embodiment of the invention based on UDS and AHP
Flow diagram；The present embodiment method includes：
Step a, according to influence diesel engine noise various influence factors, obtain diesel engine noise quality overall merit it is each because
Element, establish the hierarchical structure model of diesel engine noise quality evaluation.Specifically, each of influence diesel engine noise is being obtained
During kind influence factor, each attribute of binding tests condition and conventional practical experience analyzing influence evaluation diesel engine noise quality
Or performance；Various influence factors based on acquisition, obtain evaluating diesel engine noise quality overall merit set of factors.
In the present embodiment, analysis level parsing tree is hierarchical structure model, by the way that the synthesis of above-mentioned acquisition is commented
Valency set of factors is divided into different levels, to form above-mentioned hierarchical structure model.Specifically, diesel engine noise quality integrates
Factor of evaluation includes：Diesel engine speed, load and point position.It will be appreciated by persons skilled in the art that as evaluation because
Element, it can also be any other factor related to diesel engine noise, each factor classification is arranged, obtain sets of factors.
As shown in fig.2, it is the comprehensive of the diesel engine noise method for evaluating quality embodiment of the invention based on UDS and AHP
Close factor of evaluation collection；Obtain its diesel engine speed, load and point position respectively to the diesel engine of different model, formed evaluation because
Element collection.
Step b, each factor of diesel engine noise quality overall merit obtained according to above-mentioned steps a, each factor is assigned
Corresponding weight.Specifically, the influence degree according to each factor of evaluation of diesel engine noise quality to noise quality, to it is each because
Element assigns corresponding weight, and turns into factorial power sets.
With prior art weighted, the embodiment of the present invention, using based on Ordering Preferences are assigned using 1~9 scaling law
Enabling legislation, this method, which can eliminate traditional 1~9 Scale Method, can not meet the too big easily production of uniformity, classification ratio span
The problems such as raw Outliers, evaluation procedure repeatability difference.Specifically, the tax power method based on Ordering Preferences is to be based on
Bradlley-Tery models, Preference matrix can be obtained, certain factor of evaluation is obtained relative to destination layer using Preference matrix
Weight sets；This method is according to application diesel engine, so that it is determined that primary evaluation factor is to have to influence on diesel engine noise
Above-mentioned each factor：Diesel type, point position, rotating speed, load etc..
Step c, simplify the hierarchical structure model of above-mentioned steps a foundation using UDS tables.UDS is uniform design
Sampling, Uniform Design Sampling And Its are a kind of statistical sampling, remain the uniformity of uniform design.The basic thought of uniform design is not
Consider " neat comparable " property of testing site, and allow testing site " dispersed " in trial stretch, allow each testing site to have fully
Representativeness, can thus greatly reduce the quantity of testing site.Uniform design is particularly suitable for multifactor multilevel examination
Test the situation totally unknown with system model.
Specifically, UDS basic skills is：
For fixed positive integer n and m, uniform design generation vector (n is chosen；h1,…,hm), orderClaim point set Rn={ ci=(ci1,…,cij), i=1 ..., n } it is uniformly to set
Count UD；
From multinomial distributionM sample η of middle extraction1,…,ηm, and make
Wherein υijWith ηj, j=1 ..., m it is independent and for fromUpper equally distributed sample；{ } represents decimal
Part；Claim point set Pn={ xi=(xi1,…,xij), i=1 ..., n } it is Uniform Design Sampling And Its.
In fact, this sampling is a little obtained by uniform design take at random in the random translation of mould 1 and grid
's.This total of n of translationmIt is individual, and every group of sample point number is n, so just by all nmAll points in individual grid all with
Equal chance is extracted into, and therefore, it is a kind of statistical sampling.
As shown in fig.3, it is the UDS of the diesel engine noise method for evaluating quality embodiment of the invention based on UDS and AHP
The hierarchy Model schematic diagram that table simplifies；In the embodiment of the present invention, model of the prior art needs to make an uproar to massive diesel-fuel machine
Sound sample carries out sound quality subjective assessment, and for sound sample size considerably beyond the scope of application of Paired Comparisons, subjective assessment is difficult
To carry out.In the present embodiment, by selecting the several key factors of diesel type, point position, rotating speed, load uniformly to be set
Meter sampling, can be screened by UDS tables to data sample, and then simplify sound quality comprehensive evaluation model.
Step d, to sound quality subjective assessment；The noise data collected is inputted in computation model, utilizes algorithm routine
Evaluation result is directly exported, evaluation result is the sound quality numerical value under different factors.
Step e, the consideration obtained by the sound quality numerical value that above-mentioned steps d is obtained with step c hierarchical structure models
Factor is evaluated；Specifically, according to hierarchical model is simplified, the subjective evaluation result and Consideration of noise sample are carried out
Correlation analysis, to judge the relation between Consideration and sound quality, it is determined that be linear or non-linear, be it is independent or
It is interactional；Verify that this method carries out subjective assessment experiment according to grade scale grade scoring method to whole samples, commented
Valency result.The two preferentially ranking results and standardization result are contrasted, verifies this method accuracy.In the present embodiment, 7 etc. are passed through
Level scale grade scoring method carries out subjective assessment experiment to all 375 samples.
So far, combined preferred embodiment shown in the drawings describes technical scheme, still, this area
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these embodiments.Without departing from this
On the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to correlation technique feature, these
Technical scheme after changing or replacing it is fallen within protection scope of the present invention.
Claims (7)
- A kind of 1. diesel engine noise method for evaluating quality based on UDS and AHP, it is characterised in that including：Step a, according to the various influence factors for influenceing diesel engine noise, each factor of diesel engine noise quality overall merit is obtained, Establish the hierarchical structure model of diesel engine noise quality evaluation；Step b, each factor of diesel engine noise quality overall merit obtained according to above-mentioned steps a, each factor is assigned corresponding Weight；Step c, simplify the hierarchical structure model of above-mentioned steps a foundation using UDS tables；Step d, to sound quality subjective assessment；Step e, the Consideration obtained by the sound quality numerical value that above-mentioned steps d is obtained with step c hierarchical structure models Evaluated.
- 2. the diesel engine noise method for evaluating quality according to claim 1 based on UDS and AHP, it is characterised in that above-mentioned In step a, when obtaining the various influence factors for influenceing diesel engine noise, binding tests condition and the analysis of conventional practical experience Influence each attribute or performance of evaluation diesel engine noise quality；Various influence factors based on acquisition, obtain evaluating diesel engine Noise qualities overall merit set of factors；By the way that the overall merit set of factors of above-mentioned acquisition is divided into different levels, with formation State hierarchical structure model.
- 3. the diesel engine noise method for evaluating quality according to claim 2 based on UDS and AHP, it is characterised in that above-mentioned In step a, diesel engine noise quality overall merit factor comprises at least：Diesel engine speed, load and point position.
- 4. the diesel engine noise method for evaluating quality according to claim 1 based on UDS and AHP, it is characterised in that upper State in step b, the influence degree according to each factor of evaluation of diesel engine noise quality to noise quality, using the tax based on Ordering Preferences Quan Fa, corresponding weight is assigned to each factor, and turn into factorial power sets.
- 5. the diesel engine noise method for evaluating quality according to claim 4 based on UDS and AHP, it is characterised in that upper State in step b, the tax power method based on Ordering Preferences is to be based on Bradlley-Tery models, obtains Preference matrix, utilizes preference Property matrix obtains certain factor of evaluation and determines that factor of evaluation is at least relative to the weight sets of destination layer：Diesel type, measuring point position Put, rotating speed, load.
- 6. the diesel engine noise method for evaluating quality according to claim 1 or 2 based on UDS and AHP, it is characterised in that In above-mentioned steps c, UDS method for simplifying is：For fixed positive integer n and m, uniform design generation vector (n is chosen；h1,…,hm), orderClaim point set Rn={ ci=(ci1,…,cij), i=1 ..., n } it is uniform design UD；From multinomial distributionM sample η of middle extraction1,…,ηm, and makeWherein υijWith ηj, j=1 ..., m it is independent and for fromUpper equally distributed sample；{ } represents fractional part； Claim point set Pn={ xi=(xi1,…,xij), i=1 ..., n } it is Uniform Design Sampling And Its.
- 7. the diesel engine noise method for evaluating quality according to claim 1 or 2 based on UDS and AHP, it is characterised in that In above-mentioned steps e, according to hierarchical model is simplified, correlation point is carried out to the subjective evaluation result and Consideration of noise sample Analysis, to judge the relation between Consideration and sound quality, it is determined that be linear or non-linear, it be independence or influence each other 's；Verify that this method carries out subjective assessment experiment according to grade scale grade scoring method to whole samples, obtain evaluation result, The two preferentially ranking results and standardization result are contrasted, verifies this method accuracy.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109781245A (en) * | 2019-01-15 | 2019-05-21 | 江铃汽车股份有限公司 | A kind of method for objectively evaluating of diesel engine impulsive noise |
| CN110296847A (en) * | 2019-04-17 | 2019-10-01 | 开沃新能源汽车集团有限公司 | A kind of noise rating method of integral new-energy passenger |
| CN110530653A (en) * | 2019-08-29 | 2019-12-03 | 重庆长安汽车股份有限公司 | A kind of method of sound quality subjective assessment and its data quantization |
| CN111598395A (en) * | 2020-04-16 | 2020-08-28 | 天津大学 | Engine sound quality comprehensive evaluation method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781245A (en) * | 2019-01-15 | 2019-05-21 | 江铃汽车股份有限公司 | A kind of method for objectively evaluating of diesel engine impulsive noise |
| CN109781245B (en) * | 2019-01-15 | 2021-03-23 | 江铃汽车股份有限公司 | Objective evaluation method for pulse noise of diesel engine |
| CN110296847A (en) * | 2019-04-17 | 2019-10-01 | 开沃新能源汽车集团有限公司 | A kind of noise rating method of integral new-energy passenger |
| CN110296847B (en) * | 2019-04-17 | 2021-06-01 | 开沃新能源汽车集团有限公司 | Noise testing method for new energy passenger car |
| CN110530653A (en) * | 2019-08-29 | 2019-12-03 | 重庆长安汽车股份有限公司 | A kind of method of sound quality subjective assessment and its data quantization |
| CN111598395A (en) * | 2020-04-16 | 2020-08-28 | 天津大学 | Engine sound quality comprehensive evaluation method |
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