Applied Mechanics and Materials Vols. 16-19

Abstract: Cooperative work environment supported by computer (CSCW) is a platform for sharing information, which supports the exchange of design ideas of different teams. The collaborative design and manufacture of injection molds based on the CSCW can shorten the life cycle of mold development, improve the mold quality and lower the development cost. This paper describes the framework of collaborative design and manufacture for injection molds, discusses the construction of the organizational model and analyzes the workflow of design and manufacture.

Abstract: In order to accommodate the increasing variety of costumers’ demands, manufacturers tend to produce different models of the same product by introducing variant design concepts that improve the flexibility of design systems. In this paper, an approach based on constraint satisfaction priority is proposed to solve the dimension parameter transferring problem. Firstly, product variant parameters and variant relations are analyzed. Secondly, dimension constraint relation network model is conceived and parameters constraint forms is discussed. Finally, a parameters transfer method based on constraint satisfaction priority is established.

Abstract: Recently, the technology of fuel cell electric vehicle has won startling progress, because of the energy scarcity and circumstance pollution. Of the technology, one of the key is the hydro-thermal control strategy. This paper, with the analysis of the principle of the proton membrane exchange fuel cell cooling water circulatory system, and the research of modern intelligent control theory and methods such as fuzzy control, neutral network control, PID control etc., makes some research on the above-mentioned system based on the ANFIS neutral network reasoning system control and fuzzy-PID control, and has made well control effects via the establishment of fuzzy control rules. Furthermore works of this paper on the appraisement of different control principle and methods plays an important role on the improvement of the intelligent control level and performance of the proton membrane exchange fuel cell cooling water circulatory system.

Abstract: Process interoperability is important to achieve collaborative product design across enterprise boundaries. In this paper, first analyzes interoperability requirements in collaborative design process. Then the Process Specification Language (PSL) is introduced to design process modeling and PSL description method of design process information is given. In the end, a process interoperability framework is established based on PSL ontology and main function of modules are discussed. The framework provides an effective solution for information exchange and sharing among different process management systems in collaborative product design.

Abstract: Establish an environment-independent process flow definition for Business Process Management that can realize the common flow chart conversion with the help of flow engine. It adopts a browser-based client-side development mode to realize friendly flow user interface, and has the role-based task allocation mode and the user’s allocation-based task allocation mode, which can implement the system with the datasheet-based flow monitoring and the graphics-based flow monitoring.

Abstract: Vibrating style drier with conduction and heat transfer is a novel drying equipment combining drying technology with heat transfer technology. It has the properties of high efficiency, energy saving, environmental protection and fast speed, which overcomes the weakness of large energy consumption of drying equipment and uneven drying of sulfurization bed. It can greatly increase the quality and yield of products, improve the working environment, and increase remarkably economic benefit and energy saving effect. In this paper, the structure characteristics, the working principle, and also the application of vibrating style drier with conduction and heat transfer were introduced. Its dynamic characteristics were analyzed, which was of great significance to the application and popularization of this kind of drier.

Abstract: Basing on the system engineering 7D design planning model included the seven aspects of contents: design ideas, design environment, design objective, design step, design content, design method and design quality assessment. Combined the 7D design planning with House of Quality (HOQ), the model of design objective planning model was presented. In the model the satisfied degree of customer was the optimization object. The customer needs were satisfied with the engineering characteristics. The customer needs were analyzed with the analytic hierarchy process. The correlation among engineering characteristics was considered through the improvement relation matrix. At the same time, each customer need was insured to improve with the limited resource. Contrasted with the general optimization model this design objective planning model took the correlation of engineering characteristics into account. This optimization model was applied successfully in the NVH (Noise, Vibration, and Harshness) improvement design of vehicle. The HOQ of NVH planning was established according to the four customer needs. The six engineering characteristics were confirmed corresponding to the customer needs. The results showed that the customer need degree achieved 75.53％. If the satisfied degree wanted to be improved the cost should be increased. In this design objective planning model the resource and technology were configured in reason. It could help the technician make the reasonable judgment.

Abstract: HLA-based collaborative simulation is an effective way to integrate different disciplinary models together for the design and development of complex product. In this paper, the HLA-enabling method based on HLA agent model is proposed to make models created through commercial software compatible with HLA standard. Next, a prototype system for forging manipulator system based on such HLA-enabling method is developed accordingly, where an approach of developing ABAQUS engine agent is proposed, which solves the difficulty of wrapping ABAQUS software. Finally, a case study on forging and manipulating process is conducted and verifies the high fidelity and effectiveness of our collaborative simulation technology.

Abstract: To study the dynamic characteristic of a vibration compaction system, we first build up a double DOF model, then it is solved with transfer matrix method and the mathematical description was carried through on the status of every units in the model. Through the analysis of simulation data with simulation software, the data with the transfer matrix equation is the same as data with simulation software. This made clear that the transfer matrix model approaches to the practical circumstances and it bears important referencing value to the dynamics analysis of the correlation system.

Abstract: Aspheric surfaces of high precision and low roughness are widely used in the military field, the aeronautics and astronautics field and some high-tech fields. Therefore, research works on the methods and equipments of digitalized polishing for aspheric surfaces are a hot issue in the modern precision manufacturing. The traditional precision manufacturing mainly depends on the higher precision equipments to promote the surface quality of aspheric surfaces, but the cost of equipments seems to be extremely expensive. Taking the general CNC lathe of two axis interpolation as a platform, and basing on the controllable damping characteristic of the Magnetorheological Fluids (MRF), a new kind of compliant polishing tool system for aspheric surfaces is developed in this paper. The tool system keeps the polishing force to be stable by the torque servo unit of MRF, and implements the compliant polishing.