Papers by Author: Wen Lei Sun

Abstract: To meet users’ actual demands for fine-grained access control (FGAC) to data object in web-based parts resource sharing platform, a FGAC approach for parts resource sharing is proposed to enable both the providers and administrators to manage the permissions of parts resource jointly. In this approach, all levels of detail (LODs) are introduced in the part resource information firstly. Then, a role-based access control model for parts resource sharing, called RBAC_PRS, is provided on the basic of RBAC (Role-Based Access Control) and O-RBAC (Owners-Based Access Control) models, and the permission administration policy is also formulated in condition of the separation between ownership and usufruct of parts resource. To provide the better authorization route, two middle layers: function sets and component sets, are added in permission-role assignment process, and each role’s assignment rules are explicitly specified in an XSLT style sheet. Furthermore, an XML-XSLT based approach is adopted to accomplish the diversity expression of user-accessible view based on FGAC. And it could ensure to practice the web-based knowledge sharing system safely.

Abstract: From the start of the key technology of 3D model creating, motion simulation, visualization and interaction of roaming, and elaborates the development method of visual simulation system of virtual wind farm. this article achieved that the system not only can realize real-time roaming interaction between participants and 3D simulation system, and can simulate the interaction between the wind turbine and wind field, but also will be the application of VR technology in the dynamic analysis, processing and analysis result, enhance product development from degree and gain a higher level of details.

Abstract: This paper using ANSYS software such as wind turbine blades and other key components of the kinetic analysis and research, the kinetic analysis method and finite element analysis software combine to validate the experimental data is reasonable. Specific contents are: wind turbine blade dynamics analysis. The wind turbine blades as slender cantilever, so you can use the ANSYS program flexible dynamic analysis modules. The module is used to calculate the alternating loads flexible body structural response, namely due to the coupling effect of making wind turbine blades load acceleration, deformation at any time are changing. Also changes with time of the blade root of force and torque, the forces and torques of the hub provides theoretical data for further analysis. In this paper, the key components that wind turbine blades for the kinetic analysis, the relevant conclusions. Wind generator system for future scientific design, blades and other key components of the failure prediction assessment provides theoretical support. Wind turbine blades rotate in the movement through the air to promote the flow of the wind energy into mechanical energy, electrical energy eventually [. Leaves the force in the system is particularly complex, by gravity, such as the formation aerodynamic pull, bend and other effects and coupling effects [. Leaves elongate resilient structure is characterized by large-scale, flexible. During operation, the fan blade damage resonance is an important reason, it is how to use the features to reduce structural failure of the fan so that the safe operation of wind power generation is one of key technologies [. Wind force generator is one of the most complex parts blades, due to its tangential short span long, flexible, and therefore prone to vibration, wind turbine blades are a variety of mechanical vibration occurs first site. Therefore, from the wind turbine operation and design considerations for wind turbine blades for stability margin analysis and linear stability analysis are important.

Abstract: On the foundation of deeply studying UG re-development technology and synthetically utilizing its secondary development tools, including UG/Open MenuScript, UG/Open UIStyler, UG/Open API and Visual C++ 6.0, a dedicated 3D parts library of injection mold is established, parameterized design of injection mold is achieved and mold design efficiency improved.

Abstract: Through the development of the web parts library system, this paper intensively studies the secondary development technology of Pro/E in asynchronous mode on the .NET platform, using C # programming language, dynamically browsing three-dimensional parts technology on line and on-line parameterized driving technology, and with ADO.NET network programming technology, achieves on-line connecting database. With all the key technologies researched above, it demonstrates the feasibility of achieving each function and process of web parts library system.

Abstract: One of the purposes of building a web-based PLIB is to transform the CAD technology application from isolated environment to network. To realize the main function modules of web-based PLIB system, the object hierarchies of SolidEdge and its Second Development Technology under .NET Platform are studied. And on this basis, the implementation methods of these function modules closely related with the SolidEdge API (Application Program Interface) are detailed, including the dynamic browsing of three-dimensional part model, the online parametric design of part, the information acquisition of part property. At last, an application instance is presented.

Abstract: With the popularization of the modern smart mobile devices and the embedded graphic program method, co-design in a mobile phone or tablet PC may be a possible technique. Although the embedded modeling software still not very commonly used, 3D graphics processing capabilities of embedded systems provided an environment for viewing 3D product model on mobile devices. In order to make the product of design and manufacture more convenient and meet market demand, the study designed a kind of co-design system software on android intelligent device. This paper is based on the use of intelligent mobile devices into a mechanical and electronic product collaborative design system.

Abstract: Traditional injection mould development needs longer cycle and higher cost, while the use of virtual assembly technology can greatly reduce the cost of the design process. Besides, the cost of newly designed products injection mold shaping and its die trial was very expensive; yet virtual mold assembly system can reduce the cost in the process of actual assembly. The simulation system of injection mold assembly and modeling can be designed by applying the virtual reality technology and its virtual roaming displaying can be achieved with external control and display devices on the virtual interaction platform of the Nvision. Finally utilizing man-machine interface technology can make users immersed in a virtual environment, realize man-machine interaction and provide a brand-new information exchange interface superior to the traditional manifestation way.

Abstract: To meet the need of sharing three-dimension model among different CAD/CAM software users and enterprises, and to realize the functions of parameterizing three-dimension model, managing and expanding the data in system, a system of parametric part library is developed by using the technologies of secondary development for CAD/CAM software, ASP.NET, Database and Web3D comprehensive. This paper gives the way and process of realizing the functions above, and an instance of system is given in the paper.

Abstract: Virtual reality technology could take advantage of computers to generate a more realistic simulation environment, this article achieved that the secondary development of a virtual workshop visualization system from the point of virtual reality technology. Practice has proved that the system not only supports the real-time interaction, automatic roaming, roaming manually, real-time information inquiry, but also supports the virtual external hardware devices such as data gloves and position tracking equipment, etc.