Materials Science and Nanotechnology I

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Authors: Jing Kun Zhou, Zhong Xian Duan, Bing Cai Yu
Abstract: This article describes a strategy-oriented energy saving and emission reduction performance management system model of the Party and government leaders of counties and municipalities (hereinafter referred to as "the Leaders") consisting of a strategic formulation sub-system of the government of counties and municipalities, a strategy-oriented energy saving and emission reduction performance evaluation entity design sub-system of the Leaders, a strategy-oriented energy saving and emission reduction performance evaluation indicator selection sub-system of the Leaders, a strategy-oriented dynamic circle sub-system of important parts of energy saving and emission reduction performance management of the Leaders, and a strategy-oriented energy saving and emission reduction performance management guarantee sub-system, and give a brief description of main contents and establishment process of every sub-system
Authors: Wu Xin Wang, Chun Liang Zhang, Hou Yao Zhu, Lei Hu
Abstract: Refrigerator door cover cracking as a serious hazard in many new product development. This article describes a finite element study door cover cracking BCD268 example, the use of the ABAQUS finite element analysis of the cracking mechanism. Three kinds of different options to strengthen the tendons on the numerical simulation of the BCD268 the door cover, in the simplified model were carried out finite element analysis, experimental validation, and were come to give priority to the use of the method. The cover design out the door by the production and validation, and analysis of the ABAQUS program results are consistent. This paper is succeeded in finding a way to solve the door cover cracking, and engineering experiments to prove the validity of the method.
Authors: Zi Wei Zhou, Xin Yu O Yang, Wang Bao Xu, Nai Dong Cui
Abstract: A novel new algorithm of path planning is proposed for the robot path planning based on the local data map in the robot autonomous navigation. The algorithm is used to search for the local optimal path from the current position of the robot to the target according to the known sensor data. If the robot cannot reach the target directly, the temporary target point which the robot can reach will be set up according to the optimal path. The algorithm is effective under the complicated unknown environment and moving obstacle situation which fast searching speed, it can be adapted into the practical applications and the multi-robot harmony easily. The simulation result shows that this method can provide a better planning path by comparing with the traditional planning algorithms such as artificial potential field and wall-following
Authors: Xue Wen Chen, Ze Hu Liu, Jing Li Zhang
Abstract: The main causes of performance variation in tube bending process are variations in the mechanical properties of material, initial tube thickness, coefficient of friction and other forming process parameters. In order to control this performance variation and to optimize the tube bending process parameters, a robust design method is proposed in this paper for the tube bending process, based on the finite element method and the Taguchi method. During the robust design process, the finite element analysis is incorporated to simulate the tube bending process and calculate the objective function value, the orthogonal design method is selected to arrange the simulation experiments and calculate the S/N ratio. Finally, a case study for the tube bending process is implemented. With the objective to control tube crack (reduce the maximum thinning ratio) and its variation, the robust design mathematical model is established. The optimal design parameters are obtained and the maximum thinning ratio has been reduced and its variation has been controlled.
Authors: Ying Xue Yao, Hong Bo Wang, Liang Zhou
Abstract: A low-speed spindle running on air bearings is presented, it is used on rotary viscometer based on velocity attenuation of rotating cylinder. Principle of spindle is introduced, it is composed of a low speed motor and an air bearing. The low speed motor is a coupling of two motors. Design of the spindle shows the structure of it. Materials of the spindle are selected. The spindle is machined and operation process of it shows it is suitable for driving part of rotary viscometer based on velocity attenuation of rotating cylinder.
Authors: Ming Liang Zhang, Yong Lu, Dong Gao, Wei Chen
Abstract: The flux pinned force attracts our eyes, where the levitating system is widely investigated for the transportable application. Although plenty of experiments can lead to many significant consequences, the mechanism has been not understood completely since the enormously complicated behavior and quantum effect involve. In this paper, in order to calculate the flux pinned force analytically, the image-dipole model is adopted and improved and the simple and precise expression of magnetic strength is utilized, so the flux pinned vertical force can be calculated in analytical form. In addition, the experimental data in case of zero field-cooling and field-cooling experiment can be collected in our experimental table and the comparison is completed between the precise and simple formula and the experimental data, the precise version of expression fro flux pinned vertical force can correspond to the experimental data well.
Authors: Hao Tang, Zhao Hui Deng, Wei Liu, Lin Lin Wan, Qiao Ping Wu
Abstract: Grinding, as the last process of most products, directly affect the machining accuracy and surface quality of the product. Multi-parameter input and output and nonlinear mapping between the parameters of the grinding process play the most important part of computer simulation applied to grinding process. In this paper, the theory of computer simulation was introduced and a detail research on status of grinding process model and grinding process simulation system at foreign and domestic were elaborated, focused on the foreign academic research in this area. In the end, the paper presents an outlook of the research of grinding process simulation system.
Authors: Ge Hua Chen
Abstract: This study develops a two-color near-infrared non-contact temperature measurement system for AOD converter. We transmitted light ray by the gas path of bottom lance without additional optical unit. It eliminated errors caused by interfering factors such as long optical path, narrow spot or dust, unaffected by the emissivity of the measured object. This system improves the temperature measurement accuracy greatly. The real-time temperature measurement could better control the smelting process and improve the hit rate at the end point. The emissions of furnace slag are effectively reduced, energy consumption is lowered and the quality of steel is improved.
Authors: Qing Hua Yao, Miao Cao
Abstract: A new speed-adjustment approach of vector control for asynchronous motor is presented in the paper based on MRAS, It adopts a rotate speed calculating module which is designed specifically replaced Conventional rotate speed detecting system. The approach overcomes some shortcomings that comes from the precision and installation of rotate speed sensor. Motor rotate speed and torque curve are observed under different parameters based on MATLAB, and are analysed statically and dynamically. Simulation result showed touque ripple of this speed-adjustment system is small and timing is smooth, which can satisfy the demand of most electric equipment for speed-adjustment performance. Simulation result can realize asynchronous motor Control effectively.
Authors: Zhong Chu Wang, Xin Zhao, Ran Bi
Abstract: Cast-roll hydraulic AGC is the main control means of the strip t hickness. The control effect of traditional PID is poor for adjusting this kind of model parameters. Therefore, a new type of fuzzy neural network self-learning and adaptive controller is proposed, and analyze the composition and basic performance. The simulation results show that the new controller can effectively improve its response, what’s more it has a better dynamic performance more than another control strategies.

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