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The construction of a Virtual Environments (VE) requires a long iterative modeling and modification process. Depending on the final purposes, many actors can be involved both in the early conception and in the detailed specification of what has to be included and how it has to be organized. These actors may have different knowledge and expertise. It is therefore important to define tools easy usable...
This paper describes the SimCon (Simulated Context) Generator which combines data on the state of a Virtual Reality building with the SimCon Model to generate interactive location context for the rapid evaluation of Smart Building Applications. The paper evaluates the simulated context against physical readings. The SimCon Model does not set out to replace deterministic models, but rather allow for...
According to the concept and characteristics of virtual assembly feature, reconstruction method of virtual assembly feature model is proposed. Using the secondary development tools provided by ProEngineer, namely, ToolKit, getting assembly information is implemented. Based on analysis about three kinds mapping methods between the geometric elements and triangulated patches, an complete information...
In order to display and analyze motion process of complex productions in virtual Environment, VPMSS (Virtual Products Motion Simulation System) is developed using virtual reality technologies in this paper. Taking Turn-milling center as example, the key technologies play an important part in motion process based on virtual reality environment. Such as data formats and translation methods between CAD...
Traditional clutch design method adopts “design-preproduction-test” process, which not only spends large manpower, money, and design time, but also there is some dangerous test in this design method. The paper built automobile clutch virtual simulation design system platform according to the automobile clutch design and manufacturing process, the platform adopt numerical functional prototype model...
Due to huge number of triangles are produced when CAD model converts to graphics model that making use of the current data interface, it can't meet the requirement of real time rendering in virtual reality system. In this paper, a novel approach about CAD model's simplification and conversion was proposed. The geometry data of CAD models was simplified by reduction algorithm and then converted to...
Traditional clutch design method adopts “design-preproduction-test” process, which not only spends large manpower, money, and design time, but also there is some dangerous test in this design method. The paper built automobile clutch virtual simulation design system platform according to the automobile clutch design and manufacturing process, the platform adopt numerical functional prototype model...
Three-dimension digital map has become an important development direction of map with the fast development of the computer and spatial data acquisition technology, and it has brought a tremendous impact to our lives in the network environment. The paper described the development status and theoretical foundation of the three-dimension digital map, then introduced the construction principle of real...
The paper first outlined the Java3D technology in three-dimensional model of interactive design applications. Proposed the use of Java3D virtual three-dimensional model for the description of the client to read through the remote server customers to upload three-dimensional graphics data, user interaction with the virtual three-dimensional interactive modeling program, using the procedure of drawing...
Most current virtual maintenance systems are independent of CAD systems and the results in modification, maintainability analysis and evaluation can not be shared by CAD systems automatically and directly, reducing design efficiency and making information silo. The approach integrating virtual reality function into CAD system is adopted to build product information model of virtual maintenance integrated...
Too many polygon faces were produced if complicated cad model converts to virtual reality model while making use of the current data interface, it failed to meet with the real time requirement in virtual reality environment. In order to decreasing the number of the polygon faces at a proper precision of geometry model, the method was introduced to get the points data at the boundaries in the B-rep...
This paper describes a study of data transformation from CAD systems to virtual assembly (VA) environment based on STEP intended for simulation the assembly and disassembly process. This includes two steps. First export CAD data as STEP format file. Then translate STEP file into VA environment built with WTK toolkit. The transformation is realized based on the analysis of the STEP neutral file which...
The virtual product data model in its different stages is an essential prerequisite for the virtual modeling of processes and their virtual simulation. Product design starts with conceptual design including the concepts for the future productpsilas shape and function - the gestalt. In this stage, the designers work on fuzzy product data interpreted in so-called scribbles and applied to perception...
The development of virtual assembly platform (VAP) is discussed. It is a virtual environment on PC for training system that allows training supervisors to create training instructions and allows trainees to learn assembly operations. The models and the planning methods of assembly sequence and path are described. The virtual assembly simulation scenic framework is set up, and the level of detail technology...
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