CN105893668B - A kind of material metamorphosis functional decomposition methods semantic based on stream - Google Patents
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Abstract
The invention discloses a kind of material metamorphosis functional decomposition methods semantic based on stream, comprising: step 1, establishes meta-model and material form Type model library；Step 2, it is based on meta-model and material form Type model library, the input form and output form of material are indicated using level aspect graph；Step 3, the hierarchical state chart of comparison input form and output form obtains material configuration and changes corresponding localized variation；Step 4, priority ranking is carried out to localized variation；Step 5, localized variation operation is successively executed according to priority, is output form by input Forms Transformation.Modeling expression is carried out to the functional semantics for including material stream information at conceptual design initial stage, and derives the change procedure that material is passed through using the model of foundation progress Function Decomposition.
Description
Technical field
The present invention relates to field of computer aided design, and in particular to a kind of material metamorphosis function semantic based on stream
Decomposition method.
Background technique
Conceptual design is the important stage of system design, and 70% or so of mass customization is formed at this stage, and function
It decomposes, is the functionality and innovative core link for obtaining product in conceptual design, is present in industrial production and daily life
In a large amount of mechanical systems, core function is changed to the morphosis of certain specific materials.
In traditional conceptual design function course, the semantic expressiveness of convection current is extremely limited, only supports mostly defeated to inputting
The type of form and a small amount of attribute are described out, especially to the morphosis attribute that can not describe material stream.Due to flowing language
Adopted information lacks, and can not provide effective knowledge for Function Decomposition, hinders the automatic progress of Function Decomposition.
With the increasingly increase of multiple domain electronic product complexity, conceptual design needs to carry out system point towards different field
Analysis.In traditional concept design, lack the function modeling method of standardization, only natural language or simple block diagram indicates, inconvenient
In the knowledge sharing and reuse of the designer from different field.The search procedure of Function Decomposition and principle solution often relies on simultaneously
The Heuristics of designer is accomplished manually, and lacks the functional decomposition methods of standardization automation.
There is the problems such as modeling lack of standardization, semantic missing in existing capability representation method, especially because at the beginning of conceptual design
Phase lacks the numerical information of material manifold state structure attribute, results in and ignores for a long time to material stream detailed attributes.It is existing
Representation method is unable to satisfy the demand of analysis of system performance, and prior art does not have the ability of function automatic classifying.
Summary of the invention
The present invention provides a kind of material metamorphosis functional decomposition methods semantic based on stream, at conceptual design initial stage pair
Functional semantics including material stream information carry out modeling expression, and carry out Function Decomposition using the model of foundation and derive material institute
The change procedure of process.
A kind of material metamorphosis functional decomposition methods semantic based on stream, comprising:
Step 1, meta-model and material form Type model library are established；
Step 2, it is based on meta-model and material form Type model library, the input form of material is indicated using level aspect graph
With output form；
Step 3, the hierarchical state chart of comparison input form and output form obtains material configuration and changes corresponding office
Portion's variation；
Step 4, priority ranking is carried out to localized variation；
Step 5, localized variation operation is successively executed according to priority, is output form by input Forms Transformation.
It establishes systematic functional structrue and finds the primary and foremost purpose that principle solution is conceptual design for function, in conceptual design rank
Section, the morphosis information of material stream are relatively more abstract, it is difficult to the modeling description standardized, in order to solve this problem, the present invention
A kind of conceptual phase material manifold state structural modeling and automatic function decomposition method based on SysML is proposed, for
The menu representation model (i.e. meta-model) of system input form and output form creation based on SysML known, uses level form
Figure models the detailed morphology structure attribute of material stream, then for the menu for possessing specific input and output form properties semanteme
Representation model is changed the entirety that material stream morphosis changes from input state to output state using automatic function decomposition strategy
Become, the relationship change being decomposed between multiple material local form elements, and automatic deduction goes out relationship between these local form elements
The change sequence of transformation, realizes the automatic classifying to material variation function, convenient for the lookup of subsequent principle solution and detailed design.
Preferably, the standard criterion of the building composite S ysML of the meta-model.Meta-model in step 1 is based on SysML
Language is established, and for the morphosis attribute of material stream, defines the material structure representation and hierarchical state chart of stratification.
Preferably, material form to be abstracted as to basic regular geometric shapes, and classify according to dimension, constitutes institute
State material form Type model library.The level aspect graph includes: the hierarchical structure tree for describing material morphosis entirety, and
The local adjacent map of connection relationship between description current layer second son morphological structuring element.
The present invention establishes the object that function inputs between form and output form and attribute mapping ruler and inference rule,
It is multiple subfunctions by the formalization general function model decomposition based on input and output shape information using the rule of definition, wherein
Each subfunction has determined that the single attribute of material changes or single material structure/profile element relationship changes, corresponding step 3,
It specifically includes:
Step 3-1, all local adjacent map splits, obtains embodying input object according to the hierarchical state chart of input form
Expect the global adjacent map of form, the point set of record description input all local form elements of form and description in the overall situation adjacent map
The side collection of relation constraint between each local form element；According to the hierarchical state chart of output form, all local adjacent maps are spelled
It closes, obtains the global adjacent map for embodying outputting material form, the point set and Bian Ji of record output form in the overall situation adjacent map；
Step 3-2, the global adjacent map of comparison input form and the global adjacent map of output form, obtain newly-generated shape
Between state structural element, the morphological structuring element of disappearance, constant morphological structuring element and newly-generated morphological structuring element
Relation constraint, the relation constraint of disappearance, constant relation constraint；
Step 3-3 constructs an original form and changes adjacent map, and the point set which changes adjacent map is input shape
The union of the point set of state and output form, original form change the collection when collection is input form and output form of adjacent map
Union, and record status bit is respectively corresponded for each point and each edge, mode bit includes three kinds of states, respectively newly-generated,
It is removed and always exists；
Step 3-4 remove point to the correspondence of newly-generated point according to element conservation principle and energy minimum principle, obtains
Relationship changes effect figure.
The present invention is completed the auto-sequencing of subfunction execution sequence by functional planning algorithm, it is preferable that step 4, specific to wrap
It includes:
Step 4-1 changes each node in effect figure for relationship, records the minimum ring where the node, to all
It is -1 that initial priority, which is arranged, in side, and initializes global variable P=0；
Step 4-2 chooses a certain node as basic point, begins stepping through each section in relationship change effect figure by the basic point
Point, the priority that basic point is arranged is P；Global variable P=P+1；
Step 4-3 obtains present node and its priority current P, global variable P=currentP is enabled, to current
All neighbor nodes of node do following processing:
The side for obtaining present node and current neighbor nodes is semantic, and following mistake is executed when present node is not sorted
Journey:
If side semanteme is the variation of a relation constraint, the priority that the side and the neighbor node is arranged is P, P=P+1,
And present node is updated to current neighbor nodes, re-start step 4-3；
If side semanteme is newly-generated relation constraint, whether other coupled relations constraint where detection present node on ring
Sorted, if ranked, the priority that the side and the neighbor node is arranged is P, P=P+1, and using current neighbor nodes as
Present node re-starts step 4-3；
Step 4-4, the sequence of priority from small to large after the change of all relation constraints is all sorted, according to each edge
It is exported, obtains the priority ranking of localized variation.
The present invention, which has, carries out the expression ability of material stream morphosis in conceptual phase, has paid close attention to solid flow for the first time
Expression of the form properties at conceptual design initial stage, the level aspect graph (HSG) of proposition indicates, supports on different abstraction hierarchies
Material form attribute description, and according to international Object Management Organization formulate related specifications, the striking machine based on SysML/UML
System creates the semantic description meta-model that general function defines and flows definition on IBM Rhapsody platform, and carrying out function indicates mould
The grammer of type is realized.
The invention proposes material stream metamorphosis to decompose the strategy with change procedure planning, since HSG indicates band itself
The architectural characteristic that has levels and Hierarchical abstraction characteristic, therefore define material metamorphosis using the hierarchical structure of representation itself and send out
Corresponding relationship after before death between each profile element formulates the ordering rule of morphologic change decomposition rule and localized variation, and right
The decomposition strategy of definition has carried out the realization of java program.
The present invention can carry out automatic function decomposition, the SysML model defined with general function for the change of material form
In to the semantic description of input and output material stream based on, the entire change of material form is decomposed into multiple description materials part
The subfunction of variation, and be ranked up for the behavior of subfunction sequence.This automatic classifying process assists in designer's reason
The process that material changes is solved, decomposition result will instruct and simplify the foundation of functional architecture model, real convenient for the component to subfunction
Now carry out direct solution.
Detailed description of the invention
Fig. 1 is to define example based on the SysML language metamodel that UML extends；
Fig. 2 is that material form Type model library defines example；
Fig. 3 (a)~Fig. 3 (g) is the hierarchical chart representation example of material form；
Fig. 4 is that the original form of material form changes adjacent map；
Fig. 5 is that the relationship of material form changes effect figure；
Fig. 6 is that the SysML of general function model defines example；
Fig. 7 (a)~Fig. 7 (f) is the SysML modeling expression example that material inputs form properties；
Fig. 8 is that the packing box that implementing result inspires changes process schematic；
Fig. 9 (a), Fig. 9 (b) are the SysML modeling expression example that material exports form properties；
Figure 10 is that the present invention is based on the flow charts of the semantic material metamorphosis functional decomposition methods of stream.
Specific embodiment
The present invention provides the material metamorphosis functional decomposition methods semantic based on stream, generally comprises following steps:
Firstly, extracting most crucial attribute, and base according to the semantic feature of the input and output material stream of required description
Meta-model is established in SysML, establishes the common modeling elements such as material shapes Type model library, material attribute type model library
Knowledge base.Language defined in Object Management Organization (OMG) should be met to the modeling of meta-model or meta-model specification, use have been determined
The meta-model of justice creates functional mode, indicates all input forms and output form of function.To each input form or defeated
Form gives detailed type, attribute value definition out.Rely on functional semantics/stream Ontology modeling element Computer Aided Design person
The expression of function intention is carried out, the morphosis stream that specific definition participates in the input and output material stream of function is semantic.
Then, the mapping ruler and decomposition rule between definition input form and output form.Java code is write, is realized
Parsing and realization decomposition rule to the function Definition Model based on SysML carry out automatic function decomposition.The procedural inference goes out to flow
Between structural relation variation, finally carry out solid flow profile element variation and profile element relationship timing path planning.
After entire Function Decomposition process, each subfunction is a specific subtask, it is the class of single material object
Type, attribute, morphotype change or the relationship between two material objects and profile element changes.The result of path planning is also
The creation of functional structure provides foundation.
As shown in Figure 10, steps are as follows for specific method:
Step 1: establishing meta-model and model library
(1) SysML meta-model is established
For the specification definition for carrying out function, SysML should be extended first, establish function and the semantic relevant first mould of stream
Type.Creation process needs to meet the standard criterion of SysML.For the ease of management, meta-model can be classified by semantic type,
Define all types of meta-model of corresponding encapsulation.SysML is as Unified Modeling Language (Unified Modeling
Language, UML) extension, support using version type (Stereotype) to SysML carry out Lightweight Extensible, define needed for member
Model.Fig. 1 is to define example based on the SysML meta-model that UML extends.
As shown in Figure 1, the standard criterion of the building composite S ysML of meta-model, the meta-model include flow object, stream attribute
And relation constraint, the stream attribute includes value attribute and shape attribute, shape attribute include simple shape attribute and compound shape
Attribute.
(2) the common model library that material flow table is shown is established
Material form is the important component of material stream semantic description.Simple material form can be conceptualized as substantially
Regular geometric shapes and classify according to dimension.Material stream morphotype (Shape type) model is created in SysML
Library can be reused when modeling to specific material stream indicates, simplify modelling operability.Fig. 2 gives material stream morphotype mould
The definition example in type library.
As shown in Fig. 2, shape includes: point, line, surface, body, line includes straight line and curve, and face includes plane and curved surface, plane
Including triangle, rectangle, circle etc.；Body includes cube, cylindrical body and sphere etc..
(3) the material form modeling rule based on level aspect graph is established
Level aspect graph (hierarchical shape graph, HSG) is used on different abstraction hierarchies to material
Morphosis carries out modeling description, which includes following two parts: hierarchical structure tree (hierarchical structure
Tree, HST) it is to the direct abstract of material morphosis entirety；Local adjacent map (Local Adjacent Graph, LAG)
It is based on the interconnected relationship between description current layer second son morphological structuring element.Fig. 3 gives the HSG table of material form properties
Show method example.
Fig. 3 (a) show rice-pudding flask, and Fig. 3 (b) is the input form of rice-pudding flask, and Fig. 3 (c) is the output form of rice-pudding flask,
Fig. 3 (d) is the hierarchical structure tree for inputting form, and Fig. 3 (e) is the local adjacent map for inputting form, and Fig. 3 (f) is output form
Hierarchical structure tree and local adjacent map, Fig. 3 (g) are the global adjacent map for exporting form.
Step 2: establishing Function Decomposition rule, carry out the realization of automatic classifying function
(1) it defines Morphological Analysis rule and realizes that automatic function is decomposed
Based on the meta-model and material manifold state representation in step 1, can formulate material Morphology rule into
Row automatic function is decomposed.The formulation of rule change follows following three principles:
Conservation of matter: the constituent of input and output material stream keeps conservation on the whole.
Profile element conservation: the variation of material configuration is changed based on the local relation between its all form component
Caused by change.
Energy minimum principle: the morphologic change decomposition of material meets energy minimum principle.
(2) define and realize subfunction ordering rule
After the localized variation effect of accomplished material configuration variation, need to plan that the generation of these localized variations is suitable
Sequence.The hierarchical structure of material imply that material relationships variation change sequence.Sort algorithm follows following three principles:
Hierarchical relationship: the fractionation for material, top-down, the synthesis for material of execution sequence, change sequence is certainly
Bottom is upward.
Priority rule: on the order of occurrence that the local relation for leading to material morphosis changes, priority is from pass
System removes, and changes the gradually decline for arriving relationship generation again to relationship.
Coupled relation rule: the change of a relationship may rely on the reality for possessing other relationships of coupled relation with it
Now reach.
(3) material stream morphologic change Function Decomposition algorithm is realized:
According to input or the HSG structure of outputting material form, all local adjacent maps are spliced, obtains and embodies
The global profile element adjacent map of material form, one table of the adjacent map and a side table record all nodes and institute respectively
There is side.
By the comparison of point table and Bian Biao to input and output adjacent map, obtains newly-generated morphological structuring element, disappear
The morphological structuring element of mistake, relation constraint between constant morphological structuring element and newly-generated morphological structuring element, disappearance
Relation constraint, and the relation constraint changed.
According to above- mentioned information, constructs an original form and change adjacent map, the point set of the adjacent map is combined into input and output
The union of point set, the line set of adjacent map are the union of input and output side collection.And each point and each edge have mode bit note
Record its be it is newly-generated, be removed, still always exist.Fig. 4 is that the original form of brown flask metamorphosis changes adjacent map.Its
The middle side with double-head arrow is newly-generated relationship, and solid line side is the relationship for needing to change, and dotted line is the relation constraint for needing to remove.
It carries out removing the correspondence for arriving newly-generated point according to profile element conserva-tion principle and energy minimum principle.For one
The profile element is changed in adjacent map in original form and is removed by the case where a input morphological structuring element is split, and is only retained
Its multiple morphological structuring element being split as, and the relation constraint transfer between the element and other elements is split into
Constraint between element and other elements.
Such as: point A is split as point B and point C, changes in original form and removes point A, retention point B and point C in adjacent map,
Relation constraint between point A and other elements is deleted, it is corresponding to add point B and point C and relation constraint, and point B and point C and its
Relation constraint between his element.
Similarly with the relationship of fractionation, for newly synthesized profile element in the output, it is changed in original form and is abutted
It is removed in figure, only retains and synthesize the ingredient that those of it occurs in input.Corresponding relationship is also corresponded to.Simultaneously because group
At the generation of relationship, need to add the constraint relationship between constituent.
For example, point A and point B merge into point C, changes in original form and remove point A and point B, retention point C in adjacent map, it will
Relation constraint between the relation constraint of point A and point B, and point A and point B and other elements is deleted, addition point C and other yuan
Relation constraint between element.
According to above-mentioned steps generate relationship change effect figure, wherein each node will inform the profile element whether be
Newly synthesizes or split, and each side illustrates the change of relation constraint between profile element in figure.The change of these relation constraints
It is the essence for causing material configuration to change.Fig. 5 embodies the brown flask of performance and changes from cardboard to the relationship of box overall variation
Change effect figure.
(4) the sub- effect sort algorithm of material stream morphologic change is realized:
1. changing each of figure node firstly for relationship effect, the minimum ring where it is stored, which illustrates
Its relationship between adjacent profile element changes coupled relation.It is -1. setting global variable P=0 to all sides setting priority.
2. the node that designer chooses does the profile element represented for the starting point as figure traversal, setting priority is the overall situation
Variable P.The value of P+1 (is assigned to P) by P=P+1, enters process 3 using present node and P as parameter.
3. obtaining the priority currentP of present node and present node, P=currentP is enabled, to the institute of present node
There is neighbor node to do following processing:
3.1. the side obtained between current point and current neighbor nodes is semantic.Only execute when currently not yet sorting with mistake under son
Journey.
If a 3.2. relation constraint for needing to be changed, then the priority that the side and the neighbor node is arranged is value P,
P=P+1.And using current neighbor nodes and P as parameter, repetitive process 3.
3.3. if it is a newly-generated relation constraint type, other coupled relations constraint where first detecting it on ring is
It is no to have sorted；
If ranked, the priority that the side and the neighbor node is arranged is value P, P=P+1.With current neighbor nodes
With P as parameter repetitive process 3；
If unsorted, do not change priority.
4. effect planning process terminates after the change of all relationships is all sorted, carry out by the priority of each edge from small
To big output, then the execution sequence that the local relation for causing material configuration to change constraint changes is obtained.
Step 3: establishing functional mode, execute automatic function and decompose and sort
(1) SysML menu representation model is established according to known material information and functional requirement
According to meta-model and material form structural representation that step 1 defines, creating general function in SysML indicates mould
Type.Each input form and output form object are specified first for function.For each flow object, its stream type and category are defined
Property.For solid stream, according to known shape information, its Shape Representation model is established using HSG representation.Fig. 6 gives
The general function definition of one packing box.Fig. 7 (a) is the schematic diagram for forming packing box, and Fig. 7 (b)~Fig. 7 (f) gives packing box
The SysML model that indicates of input form properties HSG, Fig. 9 (a) and Fig. 9 (b) are that packing box exports the part HSG of form and indicates
SysML model.
It should be noted that in the SysML model of input and output material form, the adjacent map of each compound shape
In, the connection between two simple shapes all contains its relation constraint semantic information.Since length is limited, not table is skipped over.
(2) Function Decomposition is executed to functional mode and subfunction sorts
At this point, the general function Definition Model that selection is to be decomposed, executes the automatic function realized and decomposes and subfunction sequence.
Implementation procedure first can parse the information in SysML model, and input form is matched to corresponding output form.Each
The model of the HSG of material stream can be also resolved, according to HST that all LAG figure splits are adjacent for a global material profile element
Map interlinking.And the input and output adjacent map of material form is compared, then it can decompose the relationship between all elements and change.Finally
The order of occurrence of these local relations change is then determined according to subfunction sort algorithm.Table 1 gives packing box morphologic change
The detected required relation constraint variation occurred and these relationship changes are after subfunction sorts after function automatic classifying
Execution priority.
Table 1
| Priority | Constraint shifts gears | Relationship type | Origin object | Target object |
| 1 | Change (reduction) | Angle | Face 2 | Basal plane |
| 1 | Change (reduction) | Angle | Face 3 | Basal plane |
| 1 | Change (reduction) | Angle | Face 5 | Basal plane |
| 1 | Change (reduction) | Angle | Face 4 | Basal plane |
| 2 | Change (reduction) | Angle | Face 11 | Face 2 |
| 2 | Change (reduction) | Angle | Face 7 | Face 2 |
| 2 | Change (reduction) | Angle | Face 6 | Face 2 |
| 2 | Change (reduction) | Angle | Face 12 | Face 4 |
| 2 | Change (reduction) | Angle | Face 9 | Face 4 |
| 2 | Change (reduction) | Angle | Face 8 | Face 4 |
| 2 | Change (reduction) | Angle | Face 10 | Face 5 |
| 2 | It generates | Connection | Face 5 | Face 9 |
| 2 | It generates | Connection | Face 3 | Face 8 |
| 2 | It generates | Connection | Face 5 | Face 6 |
| 2 | It generates | Connection | Face 3 | Face 7 |
| 3 | Change (reduction) | Angle | Face 13 | Face 10 |
| 3 | It generates | Connection | Face 10 | Face 12 |
| 3 | It generates | Connection | Face 10 | Face 11 |
| 4 | It generates | Connection | Face 13 | Face 3 |
Fig. 8 is that the packing box inspired according to the result changes process schematic.
Claims (4)
1. a kind of material metamorphosis functional decomposition methods semantic based on stream characterized by comprising
Step 1, meta-model and material form Type model library are established；
Step 2, it is based on meta-model and material form Type model library, the input form of material and defeated is indicated using level aspect graph
Form out；
Step 3, the hierarchical state chart of comparison input form and output form obtains the corresponding part of material configuration variation and becomes
Change, step 3 specifically includes:
Step 3-1, all local adjacent map splits, obtains embodying input material shape according to the hierarchical state chart of input form
The global adjacent map of state the point set of record description input all local form elements of form and describes each office in the overall situation adjacent map
The side collection of relation constraint between portion's profile element；All local adjacent map splits are obtained according to the hierarchical state chart of output form
To the global adjacent map for embodying outputting material form, record exports the point set and Bian Ji of form in the overall situation adjacent map；
Step 3-2, the global adjacent map of comparison input form and the global adjacent map of output form, obtain newly-generated form knot
Relationship between constitutive element, the morphological structuring element of disappearance, constant morphological structuring element and newly-generated morphological structuring element
Constraint, the relation constraint to disappear, constant relation constraint；
Step 3-3 constructs original form and changes adjacent map, the original form change adjacent map point set be input form and
Export form point set union, original form change adjacent map while collection be input form and output form while collection and
Collection, and record status bit is respectively corresponded for each point and each edge, mode bit includes three kinds of states, respectively newly-generated, quilt
It removes and always exists；
Step 3-4 remove point to the correspondence of newly-generated point according to element conservation principle and energy minimum principle, obtains relationship
Change effect figure；
Step 4, priority ranking is carried out to localized variation, step 4 specifically includes:
Step 4-1 changes each node in effect figure for relationship, records the minimum ring where the node, set to all sides
Setting initial priority is -1, and initializes global variable P=0；
Step 4-2 chooses a certain node as basic point, begins stepping through each node in relationship change effect figure by the basic point,
The priority that basic point is arranged is P；Global variable P=P+1；
Step 4-3 obtains present node and its priority current P, global variable P=currentP is enabled, to present node
All neighbor nodes do following processing:
The side for obtaining present node and current neighbor nodes is semantic, and following procedure is executed when present node is not sorted:
If side semanteme is the variation of a relation constraint, the priority of the side and the neighbor node is set for P, P=P+1, and will
Present node is updated to current neighbor nodes, re-starts step 4-3；
If side semanteme is newly-generated relation constraint, whether other coupled relations constraint where detection present node on ring has been arranged
Sequence, if ranked, the priority that the side and the neighbor node is arranged is P, P=P+1, and using current neighbor nodes as current
Node re-starts step 4-3；
Step 4-4, after the change of all relation constraints is all sorted, the sequence of priority from small to large according to each edge is carried out
Output, obtains the priority ranking of localized variation；
Step 5, localized variation operation is successively executed according to priority, is output form by input Forms Transformation.
2. the material metamorphosis functional decomposition methods semantic based on stream as described in claim 1, which is characterized in that the member
The building of model meets the standard criterion of SysML.
3. the material metamorphosis functional decomposition methods semantic based on stream as described in claim 1, which is characterized in that by material
Form is abstracted as basic regular geometric shapes, and classifies according to dimension, constitutes the material form Type model library.
4. the material metamorphosis functional decomposition methods semantic based on stream as described in claim 1, which is characterized in that the layer
Secondary aspect graph includes: the hierarchical structure tree for describing material morphosis entirety, and description current layer second son morphological structuring element
Between connection relationship local adjacent map.
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| 基于SysML的模型驱动复杂产品设计的信息集成框架研究;刘玉生等;《中国机械工程》;20120630;第23卷(第12期);第1438-1445页 |
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