Research On The Theory And Implementation Technique Of Multi-layered-body Product Information Modeling

Product information model is the carrier of product data and plays an irreplaceable role in the progress of product design, analysis and manufacturing. The researches of product information modeling theory and implementation technology are highly valued both at home and abroad. Even some progress has been made in correlated theory and technique, the complicated equipment digital design needs still can not be satisfied. There are two existing issues that needed to be solved. First, the design methods of disperse system and facing the single field, and the mode of classifed modeling can not guarantee the consistency of product model data and relevance of characterization data. Moreover, it also cannot satisfy the complicated equipment digital design needs that demand the supports of complete timely information and high-precision and high-reliablity system. Second, the software system consistency problem that satisfy complicated equipment research needs can not be solved by the construction technology facing the interation of heterogeneous software system function. This has led to the result that the solution of products information integration, collaborative design process, data sharing, the knowledge accumulation and reuse, different hierarchy model iterative and evolution can not be formed effectively. In the field of practical application, it expresses distinctly as the incomplete express of product data, iterative with no objects, reuse with no carrier.The interation between product information modeling theory and software system structure interacting and the professtional field complex technologies of complex product research produces the serious challenge in doing new digital design software technology and the indepth research of andvanced product design method. Consequently, under the auspices of the credibility of the modern large-scale application software (2010CB328000) belonged to National Key Basic Research Program(973), the paper starting with research of product modeling theory, puts forward the multi-layer-body product information modeling thoery which sets information integration and reuse goal oriented and the facing mode of issue domain have been proposed, The AMFB model consisting of basic body, retrieval body, control body and intelligent body has been proposed innovatively, and the implementing software system model, products information integration and reuse software platform based on AMFB model technology have been developed. The research results have been applied to solve the typical engineering problems. A combination of the dissipative structure, and the entropy change theory being used. The quantitative research methods on the evolution characteristics of produce digital system based on time-space information difference and system structure order are proposed. The main innovations are as follows:(1) The multi-layer-body product information modeling theory aimed at information integration and reuse and characterised by facing mode of issue domain has been proposed. The theory mainly researches the construction method of product information model that satisfies the whole life cycle of the products design information integration needs. This product information model can adapt to the digital design environment which has the features such as dynamic and changeable flows, complex data types, multi-disciplinary coupling parameters and so on. The author researches the construction method of AMFB model based on multi-layer-body product information modeling theory. The AMFB model is endowed with model carrying information and information dynamic complete characteristics by building multi-layer-body structure. The researchers can structure domain-oriented AMFB model by applying the model construction method above-mentioned. The thoery provides the principle support for reseaching product digital system.(2) The model information dynamic complete thoery of problem solving demand constraints has been proposed. It researches the construction method of product information model data framework, which makes it have the ability of adapting to the dynamic changeable and complex product design multi-dimensional information integration environment. In the paper, the thoery and method of the product structured information are builded up. On the basis of it, dynamic tree isomorphism consisting with structure tree and information tree, which is used for index data structure of AMFB model, has been proposed innovatively. The data framework guarantees the consistency between the geometrical model and the non-geometry information.(3) The research methods of design process controlling of AMFB model control body has been proposed based on the design process optimization model, the design tasks multistage trigger model and the design behavior function model. The concepts of design process, design tasks and design behavior have been defined. The product design process iterative relations and product design task timing relations which have an effect on design efficiency have been researched. The design process optimization model is used to obtain the optimal design tasks sequential relation by reducing the frequency of the reverse iteration and coupling iteration. The design tasks multistage trigger model is used to describe design tasks sequential relation and model information distribution relation. The design behavior function model is built with IDEFO, and confirms the relationship between design information input and output in design behavior by in-depth analysising interaction rules of design behavior and extracting function sequence of design behavior. The researches provide the principle for the following function design of the product digital sytem.(4) The research methods on the consensus problems between AMFB model ontology and the corresponding software system subject have been proposed. The key technology corresponding to product information realization of AMFB has been researched by using the kernel resources of the geometric modeling platform of OpenCASCADE. The implementation technique and storage means of retrieval body of AMFB model have been proposed based on OCAF and XML. And on the basis of above-mentioned researches, the prototype system-AMFSDI based on the multi-layer-body product modeling theory with self-owned intellectual property right has been developed.(5) The quantitative research methods on the evolutional features of produce digital system on the basis of dissipative structure theory and entropy theory have been proposed. The feasibility of evaluation methodology of product modeling technology advantage and disadvantage has been appraised indirectly by system effectiveness. By analysing the characteristics and properties of dissipative structure, the conclusion that product digital system is a dissipative structure system has been obtained. By analysing evolutional the essence and characterization of product digital system, the research methods on the evolution characteristics of product digital system have been set up. The system order evalution model based on the time-space information difference method has been set up, which can evaluate the system order by computing information difference of time and space. The system structure order evalution model has been set up based on the computation model of the system comprehensive order degree, which is get by computing the order degrees of two order parameters. The quantitative analysis and the contrast experimental design between traditional product digital design system and AMFSDI design system with the quantitative research methods above-mentioned have been finished.