Advanced Materials Research Vols. 201-203

Abstract: Fluid flow inside radial ventilation duct is one of important facts which to decide the effect of ventilation and cooling, there is important significance to investigate.In this paper,according to the theory of Computational Fluid Dynamic(CFD),a YKK400-6、690kW medium size high voltage asynchronous motor was taken as an example.Created its 3D stator and rotor radial duct physical and mathematical model,basic assumptions and boundary conditions are determined according to CFD theories.The fluid fields are calculated and analyzed,and fluid field distribution inside radial ventilation duct is shown.Base on the length of the stator ventilation channel as a constant,changing the radial position of the stator ventilation channel peri-axle terminal,and the fluid flow characteristics are shown when the radial position was changed.Analyzing the fluid flow characteristics on either side of the stator winding,and obtaining the influence of the radial position of the stator ventilation channel peri-axle terminal on fluid flow characteristics.The results provided theoretical basis for the optimization design of motor ventilation system,and those paved the way for solving temperature field based on coupled field.

Abstract: In order to solve the problem of untrustworthy interactive process in distributed cooperative manufacturing environment, we proposed a method combining intelligent agent and interactive Process Control. The method inserts a trustworthy interaction management layer between users and information system. The management layer includes 5 agents. Interaction agent and negotiation agent track and collect data of interactive behavior; monitor agent maintain global clock to guaranty temporal consistency; assessment and analysis agent used for determining whether abnormal interactive behaviors; and feedback agent used for giving user prompt and early warning. To use this method, we constructed a trustworthy interaction chain of human-information system based on intelligent agent technology. Due to the each link of the chain is monitoring and managing by the management layer, the trustworthiness of interaction process is guaranteed.

Abstract: This paper presents an integrated method, which is based on the CAD/CAE, for engine crankshaft design. A parametric modeling system of engine crankshaft is established with the CATIA secondary development tools. Taking advantage of the finite element analysis procedure of engine crankshaft strength which is programmed with ANSYS APDL programming language, the parametric loading, automatic solution and result analysis of the crankshaft strength can be realized. Integrating the parametric modeling system of engine crankshaft and the special finite element analysis procedure of the engine crankshaft strength, the three-dimensional digital model of the crankshaft can be generated rapidly. By changing the structure dimension, the crankshaft series design is achieved and the design and analysis can be improved. Therefore, it is helpful to improve the design quality and efficiency of crankshaft and shorten the design cycle.

Abstract: The existing SAT based algorithms combines two circuits into a miter, and then convert the miter into a CNF formula. After that, a SAT solver is invoked to check the satisfiability of the CNF formula. However, when a miter is converted into CNF formula, the structure information of the circuit is lost. Therefore,we are motivated to solve the problem of miter satisfiability using circuit reasoning. We use logic synthesis first to simplify the circuit, and then use a backtracking method to check the satisfiability of the miter. The preliminary experimental result sindicate that our approach is efficient.

Abstract: To facilitate the manufacturing of an end mill, this paper presents a manufacturing model of a flat-end mill using a five-axis computer numerical control (CNC) grinding machine. Using input data of end mill geometry, wheels geometry, wheel setting and machine setting, the NC code for machining will be generated directly from a solid modeling then used as input to simulate the end mill machining in 3 Dimension before machining. The 3D simulation system of the end mill grinding is generated by VBA and AutoCAD2008. Machining simulation consists of a sequence of Boolean operations on difference between the tool and the grinding wheels through NC code. Then the major design parameters of a cutter, such as relief angle and inner radius, can be verified by interrogating the section profile of its solid model. The manufacturing model presented in this paper provides a practical and efficient method for developing CAM software for the manufacture of an end mill.

Abstract: As the automobile-bodies point cloud had the traits of large geometric dimension, huge data and rigor reverse precision, the improved iterative closet point algorithm (ICP) is put forward. The searching structure is generated using k-D tree. The closet points are searched by k-Dimensional sphere. The mapped relationship between points is generated. The matched points are filtered by the principle of geometric similarity. The solving of ICP algorithm is speeded and the registration precision of ICP algorithm is improved. The registration algorithm based on least-square and quaternion is used to calculate accurate registration result. The algorithm has certain theoretical and practical significance for improving of the efficiency and precision of registration. The reliability and accuracy of the algorithm are proved by experimentation.

Abstract: Manufacturing execution system is the link in the process of enterprise implementation information integration.The application of Radio Frequency Identification technology is important to implement the data collection function of MES. Speculation against the low efficiency, poor in real time, and low security function for data acquisition in a motor manufacturer, established data acquisition system in MES based on RFID,discussed the data collection process, designed structure of the system in detail，analyzed the function requirements,provide anti-collision algorithm to avoid data collection of the label which may be used in the system implementation,finally discussed the principle of coding.

Abstract: Based on the core of knowledge acquisition for acquiring or providing knowledge services, remote collaborative product design system provides a virtual enterprise collaborative design patterns. The paper analyzes the open design system for the remote collaborative design, and studies the decision-making flow and its strategy for the distributed collaborative complexity product design. Take multi-degree of freedom manipulator systems design as object, the management and its implementation process methods of the remote collaborative design system for the complex product collaborative design is discussed.

Abstract: Different with the traditional expert classification of building ontology, Web-platform folksonomy is used to analyze the tagging of mechanical components in the networked and collaborative environment. And according to the combination of tags of mechanical components and ontology technology, the ontology model is given based on one instance by protégé to reveal the information characteristics of mechanical components more realistically and more completely. With the trend of realization of manufacturing informationization, the mechanical components ontology provides a contribution to the communication, sharing and knowledge reusing of mechanical products.

Abstract: In the background of globalization, the information collaboration has become more and more frequent. On the purpose of improving the collaboration, we propose this model for modular products based on the SML technology. According to the features of the modular product, this model consists of two sub-models: the unified SM pool model and the information collaboration model. The first one aims for provide unified SM for enterprises. And it also provides the foundation for information collaboration. Based on the features of modular products, the second one makes work on the interface information modeling for modular products. For further illustration, two collaboration applications are introduced in this paper: information collaboration in enterprise and with others. And based on this model, a software platform system is developed to support the collaboration.