Support Top-down Design And Assembly Models Of Product Assembly Modeling System

This thesis studies the generation, conception,research content and the application of the method of top-down design,and it also expatiates the defmition,research actuality and application of the assembly model. It also does deep research on feature definition,feature classfication the relationship among features and the object-oriented technology,much emphasis was given on the combination of assembly model with feature and object-oriented technology. In the light of the method of Top-Down,the author put forward the concept of product function structure tree , which was used to express the product's function structure during the conceptual design.Based on it,the product structure was expressedThe paper studies the definition of the function model which supports the method of top-down design,and the expression of function model based on binary-tree was also put forward in the thesis.For the abstract description of parts in the assembly level and the integration with other systems during the whole life circle of the products,the concept of assembly model was presented,the definiton,classfication and expresstion method of assembly feature was studied in this thesis.The representation of assembly relationship and data structure of the assembly model based on diagram was further studied.For the constraints transfer between function model and assembly model, an hierarchical component model is presented.an arithmetic of the change of assembly relationship when assembly model changing was also studied.Fmally,a System named FB-TPMS,which using Object Oriented programming technology and Pro/Toolkit,was developed.