Advanced Materials Research Vols. 230-232

Abstract: Inductive micro-switch is an integrative device of a sensor and actuator. It can not only induce an external acceleration, but can also be controlled by the external acceleration to realize the trigger action. However, its malfunctions related to “fail-to-closure” and “transient-closure” result in low reliability and weak anti-jamming capability. A new bistable inductive micro-switch is presented based on micro size adhesive effect. The dynamic simulation is obtained by Comsol software. The simulation shows the threshold acceleration is 23.6g, and the response time is 0.38ms. The micro-switch is tested by a centrifuge. The test result shows that the threshold acceleration is 24g.The relative error between the theoretical analysis and the test result is only 1.6%.

Abstract: Oil delivery pefromance of oil pump in engines are investigated by a new prediction method based on computational fluid dynamic (CFD) and artificial neural network (ANN). CFD analysis was done by using Fluent commercial code and distribution of velocity of pump’s internal flow field was achieved by the solving of pump’s CFD model. Infromation data about oil pump’s rotate speed, supplying pressure, oil temperature and oil flow rate were obtained by CFD simulation analyzing. ANN model that used to describe the delivery performance of oil pump was employed, and the model was trained by learning samples from those CFD simulation results. Predicting for the delivery performance of oil pump under various operating conditions were carried out by this model. Experimental results were also used to validate the obtained simulation results. The studies show that the ANN(trained by CFD learning samples) predictions are in very close agreement with the oil flow obtained experimentally or predicted by CFD. The method introduced here can give useful supports for optimization designing of oil pump’s dimension.

Abstract: Using Ti, Al and Cr₂O₃ as starting materials, Al₂O₃ particulate reinforced TiAl composites have been fabricated by in-situ reaction synthesis method. Effects of the Cr₂O₃ addition on the microstructures and mechanical properties of the TiAl/Al₂O₃ composites were investigated in detail. The results show that the composites have a matrix of TiAl, Ti₃Al, and minor Cr containing phases, and a second reinforcement Al₂O₃. The addition of Cr₂O₃ effectively refined the structure of the matrix, and as a result, the mechanical properties of TiAl composites are improved. At Cr₂O₃ 7.36 wt%, the flexural strength and fracture toughness reach the maximum values of 634.62 MPa and 9.79 MPa·m^1/2, which are increased by 80% and 30%, respectively. The strengthening mechanism is also discussed.

Abstract: Machine learning and linear programming with time dependent cost are two popular intelligent optimization tools to handle uncertainty in real world problems. Thus, combining these two technologies is quite attractive. This paper proposed an effective framework to deal with uncertainty in practice, based on combing introducing learning parameter into linear programming models.

Abstract: The game design is a complex and huge task, it requires putting in a lot of manpower and material resources, and spends some time in order to create a beautiful and exquisite design of clever games. The design of three-dimensional terrain has become the focus of attention on this issue. This paper elaborates the theory about how to use the information which is got from the gray-scale map to establish a lively three dimensioned terrain. This paper designs and implements a demonstration to generate the effect of three-dimensional terrain.

Abstract: In view of the current characteristics of lacy graphic’s format and the demands of collaborative design, take Autodesk Corporation's DWF document as a foundation, has analyzed the characteristics and advantages of DWF file format. After havingAutodesk design review study the format of DWF file, in-depth research the collaborative design technology that use DWF file format to store flower patterns and use Autodesk Design Review to annotate and comment on the DWF file. This article's analysis to further study the flower format’s coordinative design and graph sharing has certain guide sense.

Abstract: This paper compares the cutting process characteristics of organic and inorganic coolant for milling process. RBD(refined, bleached & deodorized) palm olein, refined canola and soy bean oil were selected as based oil for soluble mixture(organic) while Jetkool SC95 as inorganic metalworking fluid (MWF). Throughout the research, carbide coated cutting tool and JIS SS400 mild steel are used with various feed rate, depth of cut and fixed spindle speed to determine the cutting temperature, forces and also surface roughness. Heat capacity, pH and tool wear assessment are carried out as well with same material. From the research, cutting temperature, cutting force and surface roughness are proportional to the feed rate and depth of cut. The MWFs pH level also drops after cutting process. Each MWFs showing their different strength on different assessments, overall from the results obtained, palm oil has a high potential to be marketed as organic MWF.

Abstract: The complex interaction and the high costs of modern manufacturing systems make it necessary to evaluate their use performance. Production scheduling problem is one of the key problems of research of manufacturing systems since with a proper scheduling, the utilization of resources is optimized and orders are produced on time which improves the shop performance and associated cost benefits. However the complexity of modern production systems makes the use of analytical tools more difficult. Thus a computer simulation model of the existing computer integrated manufacturing system based on the control logic that describes the operation of the system is developed to test the performance of different scheduling rules with respect to mean flow time, machine efficiency and total run time as performance measures. According to the results of experiments, the model agrees with the real system.

Abstract: It is difficult for one enterprise to separately master all the knowledge related to its product innovation design. Aiming at this problem, open innovation is introduced to product design. Key technologies of product open innovation design based on knowledge are researched. Based on the ontology expression of internal innovation knowledge, external innovation knowledge and knowledge of innovation theory, open innovation design from function to structure is achieved by gradually indexing. Each functional structure is considered as a gene. Structure innovation design is optimized by cross evolution and variation evolution, achieving organic fusion internal and external innovative design knowledge.

Abstract: Based on illuminating the structure,working principle and force analysis of vertical roller mill, the finite element analysis of rocker arms is carried out on ANSYS Workbench (AWE) platform. First of all, the structure of rocker arms and grinding roll components are simplified,then the three-dimensional entity model and meshing model of vertical roller mill both are established. Secondly, the material attribute,contact type,loads and constraints of rocker arms and grinding roll components are defined,and the total deformation, equivalent stress and safety factor of rocker arms are gained after numerical calculation.Results show that the up rocker could meet basically application requirements for its uniform stress distribution.But the lower rocker cannot meet the strength requirements for its low safety factor,and it is necessary to optimize the structure for improving the safety coefficient of lower rocker.