CN105809738A - Ecological system and CSG (constructive solid geometry)-based complex product model establishment and updating method - Google Patents
Ecological system and CSG (constructive solid geometry)-based complex product model establishment and updating method Download PDFInfo
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Abstract
The invention relates to an ecological system and CSG (constructive solid geometry)-based complex product model establishment and updating method. According to the method, the constructive solid geometry is adopted to express a product as a CSG tree; the CSG tree is adopted to construct the ecological system of the product; nodes in the CSG tree are corresponding to the populations of the ecological system; operation relations between the nodes are corresponding to food chain relations between the populations; node parameter change is corresponding to population characteristic change; when a population characteristic change, food is generated along the populations; and the food is propagated along food chains, and as a result, the other population characteristics in the ecological system are updated, and correspondingly, the node parameters in the CSG tree are updated. Compared with the prior art, and according to the method of the invention, based on the combination of the CSG and the ecological system, self adjustment and self repair of the populations of the ecological system are converted into the updating of the nodes of the CSG tree, and the ecological system is made to tend to be balanced according to the food chain theory, and a dynamic design problem which cannot be solved by the CSG can be solved.
Description
Technical field
The present invention relates to a kind of modeling method, especially relate to a kind of complex product model based on ecosystem and CSG and set up and update method.
Background technology
CSG (ConstructiveSolidGeometry) constructive solid geometry method, is a kind of configuration method carrying out solid modelling with computer, is also a kind of new configuration mode of thinking.Constructive solid geometry method, complicated entity, is regarded as and is constructed through some orderly Boolean calculations by some better simply most basic entities, and these simply most basic entities become voxel.
Complex product can be decomposed into parts, part step by step, and when carrying out Complex Product Design, generally from the basic part of bottom, the complete product until top layer builds, and is a process from simple to complex, it is necessary to through design repeatedly and checking.When certain parameter change such as accessory size, shape of product, the part being directly connected to it or the upper strata parts Parameters variation being indirectly connected with can be caused, therefore the relation between each part or parts is also a dynamic process, for being complete design and static constant complex product, use CSG constructive solid geometry method can realize the expression of product, but for design in, dynamic complex product, the method cannot construct the product after change automatically.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide a kind of complex product model based on ecosystem and CSG that product can be made automatically to adapt to part feature change to set up and update method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of complex product model based on ecosystem and CSG is set up and update method, it is characterized in that, utilize CSG constructive solid geometry method that product is expressed as CSG tree, and utilize CSG tree to build the ecosystem of product, the wherein population of the node correspondence ecosystem of CSG tree, food chain relation between the corresponding population of operation relation between node with node and population, the corresponding species characteristic change of node parameter change
During species characteristic change, producing food between population, food is propagated along food chain and is caused the renewal of other species characteristics in ecosystem, the renewal of corresponding CSG tree interior joint parameter.
The method specifically includes following steps:
S1, utilizes CSG constructive solid geometry method that product is expressed as CSG tree；
S2, changes according to product design, changes the corresponding node parameter of CSG tree and the corresponding species characteristic of ecosystem；
S3, makes the Evolution of Population in ecosystem, until ecosystem reaches balance, obtains new population, and species characteristic is updated；
S4, utilizes new population to obtain new CSG tree, recycles new CSG tree and obtains new product.
Described CSG tree is obtained by following steps:
S11, defines CSG basic solid primitives；
S12, carries out body extraction to product, it is thus achieved that product shape feature；
S13, carries out spatial alternation and canonical Boolean calculation, sets up product entity model, product is expressed as CSG tree CSG basic solid primitives.
Described CSG basic solid primitives includes spheroid, torus, cylinder, cone, polyhedron, pyramid, prism.
Described product shape feature includes part or the shape of parts, size and posture information.
Described node includes root node, intermediate node and leaf node, and root node is product, and intermediate node is part or the parts of product, and leaf node is CSG basic solid primitives.
Described food along food chain propagate time, species characteristic update, make the relation between species characteristic trend towards remaining unchanged.
The complex product of the present invention is expressed as product systems, is an open systems, and it can accept energy and the material in the external world, thus can carry out oneself's adjustment, self-regeneration when system disequilibrium.
For the change in design of product systems, the phyletic evolution thinking of the present invention is: after determining systemic-function change, and first change passes to directly related individuality, and individual and environment produces contradiction, and individual evolution is to adapt to the change of environment.Individual change is propagated by phylogenetic relationship net, causes the change of the environment at other the individual places being correlated with, and single or multiple individualities carry out coevolution, and the individual contradiction produced with environment of abatement adapts to change in environment.The propagation of design iterations change and digestion process, until not having new design alteration in system, reach balance, or until running into not revisable individuality, returns mistake, and namely this ecosystem is unable to reach balance.
Compared with prior art, the present invention utilizes CSG constructive solid geometry method that product is expressed as CSG tree, and utilize CSG tree to build the ecosystem of product, the oneself of ecosystem population adjusted, self-regeneration is converted into the renewal of CSG tree node, after realizing the change of complex product part, the automatic adjustment of other parts；Theoretical according to existing food chain, complex product is set up characteristic parameter coupling chain relationship, food along food chain propagate time, species characteristic updates, the relation between species characteristic is made to trend towards remaining unchanged, make ecosystem trend towards balance, the i.e. sizing of complex product, and then solve the insurmountable dynamic design problem of CSG voxel structured approach.
Accompanying drawing explanation
Fig. 1 is modeling method technology path block diagram of the present invention；
Fig. 2 is the part assembly relation schematic diagram of the present embodiment.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.The present embodiment is carried out premised on technical solution of the present invention, gives detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
A kind of complex product method for establishing model based on ecosystem and CSG (ConstructiveSolidGeometry), as shown in Figure 1, utilize CSG constructive solid geometry method that product is expressed as CSG tree, and utilize CSG tree to build the ecosystem of product, the wherein population of the node correspondence ecosystem of CSG tree, food chain relation between the corresponding population of operation relation between node with node and population, the corresponding species characteristic change of node parameter change；During species characteristic change, producing food between population, food is propagated along food chain and is caused the renewal of other species characteristics in ecosystem, the renewal of corresponding CSG tree interior joint parameter.
The method specifically includes following steps:
S1, utilizes CSG constructive solid geometry method that product is expressed as CSG tree；
S2, changes according to product design, changes the corresponding node parameter of CSG tree and the corresponding species characteristic of ecosystem；
S3, makes the Evolution of Population in ecosystem, until ecosystem reaches balance, obtains new population, and species characteristic is updated；
S4, utilizes new population to obtain new CSG tree, recycles new CSG tree and obtains new product.
Food along food chain propagate time, species characteristic update, make the relation between species characteristic trend towards remaining unchanged.
CSG tree is obtained by following steps:
S11, defines CSG basic solid primitives, the basic three-dimensional geometry body such as including spheroid, torus, cylinder, cone, polyhedron, pyramid, prism.；
S12, carries out body extraction to product, it is thus achieved that the shape of product shape feature, part or parts, size and posture information, and each part and assembly can be expressed with basic solid primitives；
S13, carries out spatial alternation and canonical Boolean calculation, sets up product entity model, product is expressed as CSG tree CSG basic solid primitives.
The node of CSG tree includes root node, intermediate node and leaf node, and root node is product, and intermediate node is part or the parts of product, and leaf node is CSG basic solid primitives.
First entity is carried out body extraction and decomposition by the CSG modeling pattern of product entity, thus analyzing the CSG voxel drawing product entity measurements of the chest, waist and hips model, then utilize CSG voxel to carry out spatial alternation and canonical Boolean calculation and build the measurements of the chest, waist and hips characteristic model of entity, voxel assembly relation therein have from, friendship adjacent, coplanar, non-co-planar friendship, coplanar containing, non-co-planar containing, From-To etc..
CSG modeling is by entity voxel carries out spatial variations and the conception process of Boolean calculation one solid threedimensional model of formation.The measurements of the chest, waist and hips physical model of entity is substantially forest data.Owing to forest can be made up of binary tree, thus the primitive character of composition solid and defined parameters can pass through tree representation, namely CSG tree.The leaf node of CSG tree is product voxel, and father node is set operation, and tree root is the product entity generated.
As described above, the backus naur form (BNF) that can obtain entity CSG tree represents:
<CSG entity>: :=<CSG voxel><spatial aggregation><CSG set operation><rigid body moves>
<spatial aggregation>: :=<hand over from | adjacent | coplanar friendship | non-co-planar | coplanar containing | non-co-planar containing | From-To>
<CSG set operation>: :=and | friendship | is poor
<rigid body moves>: :=<translation | rotate
Ecosystem is dynamic, time changing, is that internal system biology passes through food relation and overall with the self-organizing of environmental interaction.Under certain environment state, its internal structure can sustainable existence, it was shown that its structure has a degree of stability.Ecosystem, as organized entirety, is the organic whole with a fixed structure and adaptation function.In order to adapt to being continually changing of environment, ecosystem always develops actively in a certain way, constantly by internal process of self-organization so that whole system is harmonious.
Ecosystem remains the dynamic equilibrium of inside, and its 26S Proteasome Structure and Function is all in a metastable state.This is the result that ecosystem adapts to environment for a long time.Principal character has:
1) input and the output maintenance balance of the information of ecosystem, energy
2) the population kind in ecosystem and quantity are in a steady statue
3) food chain in ecosystem and food web keep typical pyramid nutrition rank
5) in ecosystem, in group, the generation of individual energy remains constant with consuming
When environment changes, ecosystem keeps homeostasis by self regulation.This capacity of self-regulation of ecosystem has dividing of power.The ecosystem that energy cycle of matter is more complicated, its capacity of self-regulation is more strong；Otherwise, function is just relative more weak with the ecosystem capacity of self-regulation of simple in construction.Regulate feature according to it, negative-feedback regu-lation and positive feedback can be divided into regulate.
The regulative mode of ecosystem is mainly manifested in 3 aspects: the competition between the density adjusting of identical population, different population regulates, the regulation and control that influence each other between biological and abiotic and energy.By these several regulative modes, the capacity of self-regulation of ecosystem ensures the information within ecosystem, preservation of energy, thus ecosystem is chronically at poised state.
Complex product and ecosystem have similarity in function, structure: they are all made up of multiple individuality, have the internal organizational structure of complexity, and system presents higher complexity；In certain circumstances, system has stable organizational structure, is in the state of the energy balance；The function of system be by individuality between material, energy transmitted.
The evolutionary process of complex product Evolutionary Design and ecosystem also has similarity: in the cycles such as the change of population at individual includes births & deaths, moves into, moves out, evolution, product individuality has the life cycle of generations, evolutions, superseded disappearance simultaneously；Food chain, energy Flow relation between biotic population and environment, biotic population also exist in complex product.The environment such as complex product and functional requirement carry out material, energy and information and exchange thus adapting to the change of environment.
Accordingly, in complex product intelligentized design changes, introduce Products Eco system concept, in Products Eco system, between different product population, define the food chain relation of energy transmission.Matter and energy along product food chain step by step be delivered to senior dependent population from after-product population.
In ecological environment, the energy information exchange of biotic population carries out along food chain.So-called food chain refers to the chain-type relation connected with one another closely formed in nutrition relationship between different plant species in ecosystem, matter and energy is along food chain, senior species are transferred to step by step from rudimentary species, quantity along food chain population at individual reduces step by step, population density reduces step by step, and proliferative speed slows down step by step.So compare with the individual amount of biotic population and define the ecological pyramids that bottom is wide, top is narrow.
Energy in ecological environment transmits between adjacent two kinds of species, and its delivery value calculates according to Lin Deman ecological efficiency:
Wherein,For Lin Deman ecological efficiency, In+1、InThe energy harvesting value of respectively adjacent food chain level population.
Complex product there is also the chain-type relation connected with one another closely formed in different parts relation of interdependence again, system need the change in design information brought to propagate successively along this chain relationship.According to food chain evolution algorithm, it is given at the food definition in complex product.
Food: in complex product, system environments change the unmatched information of characteristic parameter between the specific component produced is called food.Food is produced by system environments change, and product food is defined as:
Wherein, n represents the quantity of food that environment produces, PUiThe individuality of expression effect, PN represents the quantity changing parameter in product individuality, SRjRepresent former matching relationship between part feature, NRjRepresent the quantity of amendment parameter.
Food chain: in the product, product parts characteristic relation the interlock type characteristic parameter matching sequence set up is called food chain.Various Product Populations obtain existence in a certain way, required food of evolving, the change in design of product is produced raw food and is transmitted in food chain, diameter such as screw is changed flow of information and be directly affects the diameter of nut, by certain energy Flow, screw, nut establish product food linking relationship.Product food chain is defined as:
Wherein, rel represents characteristic matching relation, PGiRepresent that population i, PGj represent that population j, RN represent that the spy of population i and population j claims parameter number of matches.
Food web: in the product, all also exists certain direct or indirect relation according to food delivery relation between various Product Populations, and all of this food relationship constitutes the food web of product:
Wherein, PfChiRepresenting food chain, δ represents that transmission efficiency, food web can be regarded as the set of food chain between different product population.
The complex product of the present invention is expressed as product systems, is an open systems, and it can accept energy and the material in the external world, thus can carry out oneself's adjustment, self-regeneration when system disequilibrium.
For the change in design of product systems, the phyletic evolution thinking of the present invention is: after determining systemic-function change, and first change passes to directly related individuality, and individual and environment produces contradiction, and individual evolution is to adapt to the change of environment.Individual change is propagated by phylogenetic relationship net, causes the change of the environment at other the individual places being correlated with, and single or multiple individualities carry out coevolution, and the individual contradiction produced with environment of abatement adapts to change in environment.The propagation of design iterations change and digestion process, until not having new design alteration in system or running into not revisable individuality, return mistake.
For the assembly relation shown in Fig. 2, wherein, the feature L of part C meets relation: D1+D2≤ L, obtains the whole assembly relation ecosystem as this product accordingly, and the population in ecosystem has: population A, population B, population C, and each population comprises a part, and this part contains some features, as shown in table 1:
Table 1 characteristic relation is illustrated
| Population | Feature | Characteristic relation |
| A | D1 | |
| B | D2 | |
| C | L | D1+D2≤L |
Accordingly, feature assembly relation structure food chain is generated according to it:
PfCh=rel (C (L), A (D1)+B (D2))
Food web information is obtained according to food chain.Now, if Product environment changes, change in design information proposes.The feature D of population B2Become big, it is assumed that this value is D2' and D2' >=L, judges according to characteristic relation, matching relationship D1+D2≤ L changes, and population B produces food:
PF=(B, D1+D2≤L,D1+D2'≥L)
Now, food is propagated along food chain PfCh, travels through all characteristic relations relevant to food, now characteristic relation D in food web space1+D2≤ L changes, and food promotes that population C evolves, and feature L becomes big and meets D1+D2'≤L.Initialize the candidate solution of L, now at D1+D2When '≤L, L' is more little, quantity of food L'-(D1+D2') more level off to 0, represent that the food that population B is had is more many.
Claims (6)
1. the complex product model based on ecosystem and CSG is set up and update method, it is characterized in that, utilize CSG constructive solid geometry method that product is expressed as CSG tree, and utilize CSG tree to build the ecosystem of product, the wherein population of the node correspondence ecosystem of CSG tree, food chain relation between the corresponding population of operation relation between node with node and population, the corresponding species characteristic change of node parameter change
During species characteristic change, producing food between population, food is propagated along food chain and is caused the renewal of other species characteristics in ecosystem, the renewal of corresponding CSG tree interior joint parameter.
2. a kind of complex product model based on ecosystem and CSG according to claim 1 is set up and update method, it is characterised in that the method specifically includes following steps:
S1, utilizes CSG constructive solid geometry method that product is expressed as CSG tree；
S2, changes according to product design, changes the corresponding node parameter of CSG tree and the corresponding species characteristic of ecosystem；
S3, makes the Evolution of Population in ecosystem, until ecosystem reaches balance, obtains new population；
S4, utilizes new population to obtain new CSG tree, recycles new CSG tree and obtains new product.
3. a kind of complex product model based on ecosystem and CSG according to claim 1 is set up and update method, it is characterised in that described CSG tree is obtained by following steps:
S11, defines CSG basic solid primitives；
S12, carries out body extraction to product, it is thus achieved that product shape feature；
S13, carries out spatial alternation and canonical Boolean calculation, sets up product entity model, product is expressed as CSG tree CSG basic solid primitives.
4. a kind of complex product model based on ecosystem and CSG according to claim 3 is set up and update method, it is characterised in that described CSG basic solid primitives includes spheroid, torus, cylinder, cone, polyhedron, pyramid, prism.
5. a kind of complex product model based on ecosystem and CSG according to claim 3 is set up and update method, it is characterised in that described product shape feature includes part or the shape of parts, size and posture information.
6. a kind of complex product model based on ecosystem and CSG according to claim 1 and 2 is set up and update method, it is characterized in that, described node includes root node, intermediate node and leaf node, root node is product, intermediate node is part or the parts of product, and leaf node is CSG basic solid primitives.
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