CN110414132A - A kind of engine intelligent design method and system based on wisdom cloud platform - Google Patents
A kind of engine intelligent design method and system based on wisdom cloud platform Download PDFInfo
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Abstract
The invention discloses a kind of engine intelligent design methods and system based on wisdom cloud platform, comprising: builds smart cloud case library；Big data analysis is carried out to the numerical value shape parameter of engine in case library, determines the regularity of distribution of different engine parameters；According to engine design requirement parameter, for meeting the engine parameter of specific distribution rule, the similarity of each engine design requirement parameter Yu smart cloud case library parameter is calculated using the subordinating degree function in fuzzy theory；The overall similarity that engine design requirement parameter and smart cloud case library parameter are calculated in conjunction with nearest neighbor algorithm, Boolean algorithm and fuzzy algorithmic approach matches case from smart cloud case library output engine according to the sequence of overall similarity from high to low；Determine optimal Engine Matching case.The invention has the advantages that: can be realized engine intelligent matched design, matching result is more accurate, while can be improved design efficiency, saves design cost.
Description
Technical field
The present invention relates to Computer-aided Design Technology field more particularly to a kind of wisdom is started based on wisdom cloud platform
It can design method and system.
Background technique
Only there is provided background technical informations related to the present invention for the statement of this part, it is not necessary to so constitute first skill
Art.
Case-based reasoningf (Case-Based Reasoning, CBR) be one made inferences based on existing knowledge it is new
Technology.CBR is mainly used in artificial intelligence field, and basic principle is exactly: according to the design requirement proposed, first from case library
In search similar solution case, specifically corrected further according to current demand, realize the reuse of design scheme.In recent years
Come, due to the development of world industry, CBR technology is applied to become a main trend in manufacturing operating and decision.
Up to the present, the engineering machinery of substantial amounts, engine and key components and parts supplemental characteristic used in automobile be
More reliable data instance library can be formed, data supporting is provided for CBR technology, ensure that CBR technical feasibility.It is based on
The retrieval precision and retrieval effect of intelligent design system can be improved in the mixing case retrieval technology of fuzzy theory and nearest neighbor method
Rate not only can solve the technical problem of product design, preferably meet design requirement, and can greatly shorten design week
Phase saves design cost, promotes enterprise core competence.
Inventors have found that engine parameter is numerous, type includes Boolean type and numeric type etc., using nearest neighbor algorithm or
Person's Boolean algorithm etc. is when calculating single parameter similarity, the available guarantee of accuracy, but the parameter of engine is numerous, respectively
Parameter type is not also identical, and the similarity accuracy of single parameter is unable to satisfy engine whole design requirement.
Summary of the invention
To solve the above-mentioned problems, the present invention proposes a kind of engine intelligent design method based on wisdom cloud platform and is
System is able to carry out the calculating of engine complete machine and key components and parts parameter similarity, improves design efficiency, saves and calculates cost.
In some embodiments, it adopts the following technical scheme that
A kind of engine intelligent design method based on wisdom cloud platform, comprising:
Smart cloud case library is built, the case library includes several mature engine cases of design used；
Big data analysis is carried out to the numerical value shape parameter of engine in case library, determines the distribution rule of different engine parameters
Rule；
According to engine design requirement parameter, for meeting the engine parameter of specific distribution rule, using fuzzy theory
In subordinating degree function calculate the similarity of each engine design requirement parameter Yu smart cloud case library parameter；
In conjunction with nearest neighbor algorithm, Boolean algorithm and above-mentioned fuzzy similarity algorithm calculate engine design requirement parameter with
The overall similarity of smart cloud case library parameter is exported from smart cloud case library according to the sequence of overall similarity from high to low and is sent out
Motivation matches case；
Determine optimal Engine Matching case.
In other embodiment, adopt the following technical scheme that
A kind of engine intelligent designing system based on wisdom cloud platform, comprising:
For building the module of smart cloud case library, the case library includes that several mature engines used are set
Count case；
Big data analysis is carried out for the numerical value shape parameter to engine in case library, determines point of different engine parameters
The module of cloth rule；
For according to engine design requirement parameter, for meeting the engine parameter of specific distribution rule, using fuzzy
Subordinating degree function in theory calculates the similarity of each engine design requirement parameter and smart cloud case library parameter
Module；
For combining nearest neighbor algorithm, Boolean algorithm and above-mentioned fuzzy similarity algorithm to calculate engine design requirement ginseng
Several overall similarities with smart cloud case library parameter, it is defeated from smart cloud case library according to the sequence of overall similarity from high to low
The module of Engine Matching case out；
For determining the module of optimal Engine Matching case.
In other embodiment, adopt the following technical scheme that
A kind of terminal device comprising processor and computer readable storage medium, processor is for realizing each instruction；Meter
Calculation machine readable storage medium storing program for executing is suitable for being loaded by processor and being executed above-mentioned based on wisdom for storing a plurality of instruction, described instruction
The engine intelligent design method of cloud platform.
In other embodiment, adopt the following technical scheme that
A kind of computer readable storage medium, wherein being stored with a plurality of instruction, described instruction is suitable for by terminal device
Reason device loads and executes the above-mentioned engine intelligent design method based on wisdom cloud platform.
Compared with prior art, the beneficial effects of the present invention are:
The present invention calculates each hair for meeting the engine parameter of different distributions rule, the method that setting is respectively adopted
The similarity of motivation design requirement parameter；The overall similarity for obtaining case and target in case library, provides target case, thus
The design of complete coupled engines, while components parameter is issued into corresponding manufacturer, realize engine intelligent matched design, matching knot
Fruit is more accurate, while can be improved design efficiency, saves design cost.
The present invention calculates similarity using different methods for the parameter of different distributions feature, forms comprehensive Case Retrieval
Algorithm constitutes engine intelligent design specialist system, to set between main engine factory and parts enterprises in wisdom cloud platform
Meter matching provides technical support.
Detailed description of the invention
Fig. 1 is the engine intelligent design method flow chart based on wisdom cloud platform in embodiment one.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms that the present invention uses have logical with the application person of an ordinary skill in the technical field
The identical meanings understood.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Embodiment one
In one or more embodiments, a kind of engine intelligent design method based on wisdom cloud platform is disclosed,
As shown in Figure 1, comprising:
A smart cloud case library is built first, and the mature case engine largely used is contained in the case library
Example, in case library, these cases are by country origin, diesel engine model, cylinder arrangement mode, manufacturer's title, combustion-chamber shape, increasing
Whether cold in pressure, outer dimension, stroke, cylinder diameter, nominal power, rated speed, mean piston speed, mean effective pressure, body
Product power, weight/power ratio, fuel consumption rate, compression ratio, cylinder total displacement, number of cylinders, net weight characteristic item parameter indicate.
Big data analysis is carried out to engine numeric type characteristic item first, obtains the regularity of distribution of characteristic item, engine air
Cylinder number, engine stroke meet Triangle-Profile；Cylinder diameter meets Gaussian Profile；Nominal power meets antilinear distribution；Averagely have
Effect pressure and compression ratio meet trapezoidal profile.
Engine design parameters type is different, and it is distinct to calculate algorithm used by similarity.
It originally is to provide engine design parameters in embodiment as characteristic item and carry out similarity calculation, engine design ginseng
Whether number includes: country origin, diesel engine model, cylinder total displacement, rated speed, net weight, cylinder arrangement mode, charge inter cooling, fire
Burn room form, number of cylinders, cylinder diameter, mean effective pressure and nominal power；
Wherein, country origin, diesel engine model, cylinder total displacement, rated speed, net weight characteristic item are calculated according to nearest neighbor algorithm
Similarity, cylinder arrangement mode, charge inter cooling whether, use Boolean algorithm to calculate similarity, and number of cylinders is according in fuzzy theory three
Angular algorithm calculates similarity, and cylinder diameter calculates similarity according to Gauss algorithm, and mean effective pressure is calculated with trapezoidal algorithm, demarcates
Power is calculated with antilinear algorithm.
According to big data analysis as a result, carrying out similarity calculation respectively to engine features item, specifically:
The triangle degree of membership in fuzzy theory wherein is used for the number of cylinders and stroke parameter that meet Triangle-Profile
Function calculates similarity, calculates, and the parameter lower limit of cylinder number is 2, and parameter upper limit is 12, optimized parameter
Value is 6；Engine stroke parameter lower limit is 90mm, parameter upper limit 170mm, optimal value of the parameter 130mm.
Similarity is calculated to Gauss subordinating degree function in the cylinder diameter application fuzzy theory for meeting Gaussian Profile, obtains cylinder diameter ginseng
Number lower limit is 80mm, lower deviation 100mm, parameter upper limit 120mm, upper deviation 200mm, optimal value of the parameter 180mm.
The nominal power for meeting antilinear distribution is calculated according to antilinear subordinating degree function, parameter lower limit is
1100kW, lower deviation 350kW.
The mean effective pressure and compression ratio application trapezoidal membership function that meet trapezoidal profile are calculated, averagely had
The parameter lower limit for imitating pressure is 0.24MPa, and parameter lower deviation is 1MPa, parameter upper limit 2MPa, upper deviation 2.5MPa；Compression
The parameter lower limit of ratio is 13, lower deviation 14, parameter upper limit 18, the upper deviation 22.
Engine overall similarity is calculated, specific formula for calculation are as follows:
In formula,For characteristic item c in nearest neighbor algorithmi、xiBetween Euclidean distance, ciFor case library
I-th of arest neighbors characteristic item of middle example；xiFor i-th of arest neighbors characteristic item of engine design parameters,The similarity between characteristic item in nearest neighbor algorithm；δ(c'i,x'i) it is Boolean type algorithm, wherein c'i
For i-th of Boolean type characteristic item of example in case library, x'iFor i-th of Boolean type characteristic item of engine design parameters, according to 0,
1 mode calculates similarity between characteristic item；Sim(c"i,x”i) it is that fuzzy algorithmic approach calculates characteristic item similarity formula, wherein c "iFor
I-th of example fuzzy type characteristic item in case library；x"iType characteristic item is obscured for i-th of engine design parameters, s is characterized
It is Boolean type number of parameters is 2, ω that number, which is 12, p to be using the number of parameters of nearest neighbor algorithm be 5, q,aTo use recently
Each Feature item weighting of adjacent algorithm is 0.33, ωbIt is 0.33, ω for each Feature item weighting of boolean's shape parametercTo use mould
The each Feature item weighting for pasting algorithm is 0.34, ωu、ωv、ωwRespectively nearest neighbor algorithm, Boolean type algorithm and fuzzy algorithmic approach
Weight, respectively 0.33,0.33 and 0.34, J (C, X) be engine overall similarity.
Similarity calculation engine whole matching phase is carried out to the above different types of characteristic item parameter by hybrid algorithm
Like degree, by finding the high case of similarity in case library, according to Sequential output Engine Matching case from high to low, lead to
It crosses selection and obtains engine design matching scheme, while Parameters of The Parts is provided to corresponding manufacturer.
In the present embodiment, similarity calculation is carried out according to big data analysis and fuzzy theory logarithm type characteristic item, is obtained
Each characteristic item similarity, improves to obtain hybrid algorithm in conjunction with nearest neighbor algorithm and fuzzy theory, and the hybrid algorithm is to inhomogeneity
Type characteristic item carries out similarity calculation, obtains an engine overall similarity, so that providing engine target example completes hair
The design of motivation intelligent Matching.
By building smart cloud case library, for main engine plants to engine demand, the overall performance of engine can be matched
Parameter and components performance parameter, can in existing supplier's components the optimal system zero portion of accurate match as needed
Part realizes one-to-one specific aim clothes if the product needed for not, can also carry out online bidding and offering activity by cloud platform
Business.
Embodiment two
In one or more embodiments, a kind of engine intelligent designing system based on wisdom cloud platform is disclosed,
Include:
For building the module of smart cloud case library, the case library includes that several mature engines used are set
Count case；
Big data analysis is carried out for the numerical value shape parameter to engine in case library, determines point of different engine parameters
The module of cloth rule；
For according to engine design requirement parameter, for meeting the engine parameter of specific distribution rule, using fuzzy
Subordinating degree function in theory calculates the similarity of each engine design requirement parameter and smart cloud case library parameter
Module；
For combining nearest neighbor algorithm, Boolean algorithm and above-mentioned fuzzy similarity algorithm to calculate engine design requirement ginseng
Several overall similarities with smart cloud case library parameter, it is defeated from smart cloud case library according to the sequence of overall similarity from high to low
The module of Engine Matching case out；
For determining the module of optimal Engine Matching case.
Embodiment three
In one or more embodiments, a kind of terminal device, including server are disclosed, the server includes depositing
Reservoir, processor and storage on a memory and the computer program that can run on a processor, described in the processor execution
The engine intelligent design method based on wisdom cloud platform in embodiment one is realized when program.For sake of simplicity, no longer superfluous herein
It states.
It should be understood that processor can be central processing unit CPU, and processor can also be that other are general in the present embodiment
Processor, digital signal processor DSP, application-specific integrated circuit ASIC, ready-made programmable gate array FPGA or other are programmable
Logical device, discrete gate or transistor logic, discrete hardware components etc..General processor can be microprocessor or
The processor is also possible to any conventional processor etc..
Memory may include read-only memory and random access memory, and provides instruction and data to processor, deposits
The a part of of reservoir can also include non-volatile RAM.For example, memory can be with the information of storage device type.
During realization, each step of the above method can by the integrated logic circuit of the hardware in processor or
The instruction of software form is completed.
The engine intelligent design method based on wisdom cloud platform in embodiment one can be embodied directly in hardware handles
Device executes completion, or in processor hardware and software module combination execute completion.Software module can be located at deposits at random
This fields such as reservoir, flash memory, read-only memory, programmable read only memory or electrically erasable programmable memory, register
In mature storage medium.The storage medium is located at memory, and processor reads the information in memory, completes in conjunction with its hardware
The step of above method.To avoid repeating, it is not detailed herein.
Those of ordinary skill in the art may be aware that each exemplary unit, that is, algorithm steps described in conjunction with the present embodiment
Suddenly, it can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions actually with hardware still
Software mode executes, specific application and design constraint depending on technical solution.Professional technician can be to each
Specific application is to use different methods to achieve the described function, but this realization is it is not considered that exceed the model of the application
It encloses.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of engine intelligent design method based on wisdom cloud platform characterized by comprising
Smart cloud case library is built, the case library includes several mature engine cases of design used；
Big data analysis is carried out to the numerical value shape parameter of engine in case library, determines the regularity of distribution of different engine parameters；
According to engine design requirement parameter, for meeting the engine parameter of specific distribution rule, using in fuzzy theory
Subordinating degree function calculates the similarity of each engine design requirement parameter Yu smart cloud case library parameter；
Engine design requirement parameter and wisdom are calculated in conjunction with nearest neighbor algorithm, Boolean algorithm and above-mentioned fuzzy similarity algorithm
The overall similarity of cloud case library parameter, according to the sequence of overall similarity from high to low from smart cloud case library output engine
Match case；
Determine optimal Engine Matching case.
2. a kind of engine intelligent design method based on wisdom cloud platform as described in claim 1, which is characterized in that described
The engine parameter for including in engine cases of design include: country origin, diesel engine model, cylinder arrangement mode, manufacturer's title,
Whether combustion-chamber shape, charge inter cooling, outer dimension, stroke, cylinder diameter, nominal power, rated speed, mean piston speed, put down
Equal effective pressure, summation watt rating, weight/power ratio, fuel consumption rate, compression ratio, cylinder total displacement, number of cylinders and net weight characteristic item
One of parameter is a variety of.
3. a kind of engine intelligent design method based on wisdom cloud platform as described in claim 1, which is characterized in that case
The numerical value shape parameter of engine carries out data analysis in example library, determines the regularity of distribution of different engine parameters, specifically: start
Machine number of cylinders, engine stroke meet Triangle-Profile；Cylinder diameter meets Gaussian Profile；Nominal power meets antilinear distribution；It is flat
Equal effective pressure and compression ratio meet trapezoidal profile.
4. a kind of engine intelligent design method based on wisdom cloud platform as claimed in claim 3, which is characterized in that for
The engine parameter for meeting the regularity of distribution calculates each engine design requirement using the subordinating degree function in fuzzy theory
The similarity of parameter and smart cloud case library parameter, specifically:
Triangle degree of membership letter in fuzzy theory is used for the number of cylinders and engine stroke parameter that meet Triangle-Profile
Number calculates similarity；
Cylinder diameter parameter for meeting Gaussian Profile calculates similarity using Gauss subordinating degree function in fuzzy theory；
Nominal power parameter for meeting antilinear distribution calculates similarity using antilinear subordinating degree function in fuzzy theory；
Trapezoidal membership function in fuzzy theory is used to calculate phase the mean effective pressure and compression ratio that meet trapezoidal profile
Like degree.
5. a kind of engine intelligent design method based on wisdom cloud platform as described in claim 1, which is characterized in that described
Engine design requirement parameter attribute item includes: country origin, diesel engine model, cylinder total displacement, rated speed, net weight, inblock cylinder
Whether column mode, charge inter cooling, one of combustion-chamber shape, number of cylinders, cylinder diameter, mean effective pressure and nominal power or more
Kind.
6. a kind of engine intelligent design method based on wisdom cloud platform as claimed in claim 5, which is characterized in that described
Country origin, diesel engine model, cylinder total displacement, rated speed and net weight characteristic item calculate similarity according to nearest neighbor algorithm；It is described
Characteristic item calculates similarity according to Boolean algorithm whether cylinder arrangement mode, charge inter cooling；The number of cylinders characteristic item is according to mould
It pastes theoretical intermediate cam shape algorithm and calculates similarity；The cylinder diameter characteristic item calculates similarity according to Gauss algorithm；It is described averagely to have
It imitates pressure and similarity is calculated according to trapezoidal algorithm, the nominal power characteristic item calculates similarity according to antilinear algorithm.
7. a kind of engine intelligent design method based on wisdom cloud platform as described in claim 1, which is characterized in that calculate
The overall similarity of engine design requirement parameter and smart cloud case library parameter, specifically:
In formula,For characteristic item c in nearest neighbor algorithmi、xiBetween Euclidean distance, ciIt is real in case library
I-th of arest neighbors characteristic item of example；xiFor i-th of arest neighbors characteristic item of engine design parameters,For
Similarity between characteristic item in nearest neighbor algorithm；δ(c'i,x'i) it is Boolean type algorithm, wherein c'iIt is i-th of example in case library
A Boolean type characteristic item, x'iFor i-th of Boolean type characteristic item of engine design parameters, phase between characteristic item is calculated according to 0,1 mode
Like degree；Sim(c"i,x”i) it is that fuzzy algorithmic approach calculates characteristic item similarity formula, wherein c "iIt is i-th of example in case library
Fuzzy type characteristic item；x"iType characteristic item is obscured for i-th of engine design parameters, s is characterized a number, and p is to use arest neighbors
The parameter of algorithm, q are boolean's shape parameter, ωaFor each Feature item weighting for using nearest neighbor algorithm, ωbFor boolean's shape parameter
Each Feature item weighting, ωcFor each Feature item weighting for using fuzzy algorithmic approach, ωu、ωv、ωwRespectively nearest neighbor algorithm,
The weight of Boolean type algorithm and fuzzy algorithmic approach, J (C, X) are engine overall similarity.
8. a kind of engine intelligent designing system based on wisdom cloud platform characterized by comprising
For building the module of smart cloud case library, the case library includes several mature engine design cases used
Example；
Big data analysis is carried out for the numerical value shape parameter to engine in case library, determines the distribution rule of different engine parameters
The module of rule；
For according to engine design requirement parameter, for meeting the engine parameter of specific distribution rule, using fuzzy theory
In subordinating degree function calculate the module of the similarity of each engine design requirement parameter and smart cloud case library parameter；
For combine nearest neighbor algorithm, Boolean algorithm and above-mentioned fuzzy similarity algorithm calculate engine design requirement parameter with
The overall similarity of smart cloud case library parameter is exported from smart cloud case library according to the sequence of overall similarity from high to low and is sent out
The module of motivation matching case；
For determining the module of optimal Engine Matching case.
9. a kind of terminal device comprising processor and computer readable storage medium, processor is for realizing each instruction；It calculates
Machine readable storage medium storing program for executing is for storing a plurality of instruction, which is characterized in that described instruction is suitable for by processor load and perform claim
It is required that the described in any item engine intelligent design methods based on wisdom cloud platform of 1-7.
10. a kind of computer readable storage medium, wherein being stored with a plurality of instruction, which is characterized in that described instruction was suitable for by end
The processor load and the described in any item engine intelligents designs based on wisdom cloud platform of perform claim requirement 1-7 of end equipment
Method.
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