Advanced Materials Research Vols. 403-408

Abstract: Transient stability of the MicroGrid in which the micro sources use the P-f & Q-V droop control and PQ control was investigated. The impacts of motor load, different types of faults and the different locations of faults on the transient stability of the MicroGrid are presented in this paper. And the relation between the proportion of motor load and Fault Clearing Time (FCT) was explored.

Abstract: Soft-Starter is a new equipment and it is used to control Squirrel-Cage Induction Motors because of its pefect control effect, compared with the traditional Start method. This paper analysis the superiority of Voltage Ramp and current limit control algorithm.The MATLAB simulation result base on 4.7KW Motor shown that the soft-starter can be used to Reduce the start voltage, limit start Current and Reduce the impact on power. Correctness and validity of algorithms is verified by simulation results.

Abstract: This In this paper, we study the boom of truck-mounted concrete pump, we determine that the four booms extending horizontally is the most dangerous working conditions. This paper bases on Pump arm boom functional and structural characteristics, strength, stiffness, stability. By Finite element method, the dynamic characteristics of arm pump is analysed. we use Solid Works to design three-dimensional entity. and, in the finite element analysis of Solid Works plug-in Cosmos Work environment we finish the theoretical modal analysis. We get its top ten natural frequencies and mode shapes, and analyze the results .This method is designed for high effect and quality Pump arm boom ,providing precise reliable data.

Abstract: The procurement allocation model of single product in vendor selection is studied under stochastic demand and incremental price discount. A fuzzy multi-objectives programming model is presented for solving the problem of vendor selection with fuzzy multi-objectives. Not only a process and procedure is summarized, but also feasibility and effectiveness of the proposed method is proved.

Abstract: In order to increase autonomy and adaptive system, this article builds a control model based on biological mechanism of DNA. In the cell gene controls the characteristics of the organism by guidance to synthesis of proteins. On the basis of the research in the biological regulation of DNA expression and mechanism, building cell control model based on Petri nets, sketch-like cell control system design of basic ideas and principles, and the article provides a modeling method to improve system performance.

Abstract: In order to investigate the progress of the composite films growth, and the influence of the process parameters to the film‘s structure, this paper uses the off-lattice KMC method to research the Ti-Si-N nanocomposite film, and calculate the influence of deposition temperatures, deposition rate and Si content to the film’s surface roughness, nucleation size and density of initial stage. The results show that with deposition temperature and deposition rate ascend, it can increase transition event, decrease the film’s surface roughness. Si content works on nucleation in initial stage, and the more Si contents, the larger of nucleation rate and the smaller of the grain crystal.

Abstract: Uncertainty factors which influence the resource plan for collaborative logistics network, is the completely uncertain problem that parameter status and probability distribution are unknown, but traditional plan methods can’t ensure the robustness of plan implementation. Based on robust optimal control, the paper carries on simulation about uncertain parameters with Monte Carlo method, and proposes a expected model of robust restraint, the robustness constrains realizes to contract the feasible region and improve robustness of model. Finally, The simulation results illustrate the validity of the improved model.

Abstract: Through the analysis of micro-structures of Z-pin ends the basic hypothesis of elliptic configuration of the resin regions around Z-pin ends were proposed. The finite element model of the tensile modulus of X-cor sandwich was established and the finite element software ANSYS was used in the computation. The effects of Z-pin angle, diameter and density on the tensile modulus of X-cor sandwich were analyzed. Via the analysis of finite element model, the influencing trends of parameters of X-cor sandwich on the tensile modulus are achieved and the error range is ±10%. So the rationality of the proposed finite element model is verified and the finite element model can be used to forecast the tensile modulus of X-cor sandwich.

Abstract: According to the special characteristics of engineering equipment supportability in operation phase, we establish a completed parameter index system. Based on the fuzzy mathematics theory, we establish the single-factor parameter index assessment model of engineering equipment supportability in operating phase. And based on the neural network theory, we design the comprehensive assessment model. These models offer an effective method for the assessment of engineering equipment supportability in operation phase. The engineering equipment in operating phases of this paper is defined as: engineering equipment, perform and the process of combat mission.

Abstract: Based on the research about the injection molding simulation technology such as 2.5-d model and 3D model, Numerical analysis on a same gas-assisted product was implemented using Moldflow software’s middle-face model and 3D model technology, and the physical experiment was also implemented. Through comparing the simulation results and experimental results, it shown that the time of the gas-assisted injection molding simulation based on 3D model is long, but the simulation results are more in line with experimental results than middle-face model. The numerical simulation using 3D model can truly and reliably predict the product’s molding process, and meet the demand to guide production.