检索结果-南通市图书馆

Integrated Modeling and Intelligent Control Methods of Grinding Process

在线全文

学校读者我要写书评

暂无评论

Integrated Modeling and Intelligent Control Methods of Grind...

Effect of Deformation between Stands on the Strip Shape in Hot Rolling

2011 Chinese Control and Decision Conference（CCDC）

作者： Wang Jie-sheng is with the school of Electronic and Information engineering,liaoning university of science & technology,anshan,114044,china .Sun Shi-feng is with the school of Electronic and Information engineering,liaoning university of science & technology,anshan,114044,china

The grinding industrial production system is a typical complex nonlinear multivariable process with strongly coupling and large time *** up-to-the-minute research results of integrated modeling and intelligent control of grinding process are *** mainly includes the fuzzy control,artificial neural network control,soft-sensor modeling and hybrid intelligent control *** the end the future research directions in the grinding process control field is concluded.

关键词： Grinding Process Integrated Modeling Intelligent Control

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2000年第3期14卷 222-224页

作者： Qinghai Wu, Jie Zhang, Changsong Wang, Gangcheng Wei, Ping Song, Changhe Deng ( mechanical engineering school, university of science and technology Beijing, Beijing 100083, china Wuhan Iron & Steel Corporation) mechanical engineering school University of Science and Technology Beijing Beijing 100083 China Wuhan Iron and Steel Corporation China

A theoretical model about the secondary deformation is developed by the combination of analytical and experimental approaches. A system simulation based on the model is completed to predict the strip profile after the interstand deformation. On the other hand, comprehensive experiments and quantitative comparisons are made to calibrate the model for a wide variety of products. As a result, the correction of the model has been verified by the actual rolling data from production mill and it is helpful to improve the strip shape control.

关键词： hot rolling strip shape secondary deformation

Sol-gel-derived Hybrid Conductive Films for Electromagnetic Interference (EMI) Shielding

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan university of technology(Materials science) 2011年第2期26卷 217-222页

作者：解基源 school of Information and Comunication engineering North University or China

The conductive nano-sized zinc particles were embedded in an insulating amorphous silica matrix,and the hybrid films were obtained by a sol-gel *** stable hybrid sol solution was prepared by hydrolysis and condensation of Methyltrimethoxysilane （MTMS） with a one-step acidic catalyst *** films were dip-coated on silicon wafer and cured at 120℃ for *** structural characterization of hybrid films were investigated by means of attenuated total reflection infrared （ATR-IR） spectroscopy and X-ray diffraction （XRD）.The electrical properties of the films were examined with four-point *** films showed to be relatively dense,uniform and defect *** conductivity of hybrid films was varied with the different contents of zinc nanoparticles and the thickness of the *** was observed that there was the percolation threshold for the film＇s electrical properties.

关键词： sol-gel hybrid films conductive EMI shielding

Simulation of Vertical Planetary Mill Based on Virtual Prototyping

在线全文

学校读者我要写书评

暂无评论

Journal of university of science and technology Beijing 2001年第2期8卷 86-90页

作者： Ruitao Li, Mei Fang, Wenming Zhang, Yue Ma (Civil and Environmental engineering school, university of science and technology Beijing, Beijing 100083, china) Civil and Environ. Eng. school University of Science and Technology Beijing 100083 China

The mechanical model of vertical planetary mill is set up, whose dynamic and kinetic characteristics are described as well. Based on the analysis of system dynamics of vertical planetary mill, virtual prototyping technology is applied in the simulation of this mill. The development of virtual prototype of equipment, virtual test and optimization of virtual prototype are stated in detail. Some useful conclusions which have theoretical meaning for the manufacturing of vertical planetary mill have been obtained. Furthermore, it is pointed out that virtual prototyping technology shows great advantage and is bound to become a main method of developing product in the future.

关键词： virtual prototype vertical planetary mill dynamics simulation ADAMS

TECHNIQUES ABOUT DIRECT OPTIMIZING CONTROL OF GREEN SAND QUALITY

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of mechanical engineering 2002年第1期15卷 83-86,93页

作者： Li Dayong Xu Xiongfei Ma Xuliang Zhang Yutong school of Material science and engineering，Harbin university of science and technology， Harbin 150080，china school of Material science and engineering Harbin University of Science and Technology Harbin 150080

Green sand casting is still a main method in the world at present and it isvery significant to develop the technology of controlling green sand quality. A new concept, fromcontents test to contents control, is advanced. In order to realize the new idea, a new method toon-line test active clay and moisture of green sand - double powers energizing alternately (DPEA)method is put forwards. The principle of the new method is to energize standard sand sample with ACand DC powers and to test the electric parameters, and then, to calculate active clay and moistureof green sand by using artificial neural network (ANN). Based on this new method, a directoptimizing system for controlling green sand quality is developed. Techniques about testing andcontrolling methods, hardware and software are discussed.

关键词： New technology Green sand quality Optimizing control

Calculation and characteristics analysis of blade pitch loads for large scale wind turbines

在线全文

学校读者我要写书评

暂无评论

science china(Technological sciences) 2010年第5期53卷 1356-1363页

作者： DAI JuChuan1,2,HU YanPing1,LIU DeShun1,2 & LONG Xin3 1 school of Electromechanical engineering,Hunan university of science and technology,Xiangtan 411201,china 2 College of mechanical and Electrical engineering,Central South university,Changsha 410083,china 3 Hara XEMC Windpower Co.,Ltd.,Xiangtan 411000,china school of Electromechanical engineering Hunan University of Science and Technology Xiangtan China College of mechanical and Electrical engineering Central South University Changsha China Hara XEMC Windpower Co. Ltd. Xiangtan China

Based on the electric pitch system of large scale horizontal-axis wind turbines,the blade pitch loads coming mainly from centrifugal force,aerodynamic force and gravity are analyzed,and the calculation models for them are established in this *** illustration,a 1.2 MW wind turbine is introduced as a practical sample,and its blade pitch loads from centrifugal force,aerodynamic force and gravity are calculated and analyzed separately and *** research results showed that in the process of rotor rotating 360o,the fluctuation of blade pitch loads is similar to cosine curve when the rotor rotational speed,in-flow wind speed and pitch angle are ***,the amplitude of blade pitch load presents quite a difference at a different pitch *** ways of calculation for blade pitch loads are of the universality,and are helpful for further research of the individual pitch control system.

关键词： blade pitch loads wind turbine individual variable-pitch pitch axis

A new composite:spray-deposited M2 high speed steel reinforced by WC particles

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 1997年第3期11卷 14-17页

作者： ZHANG Liying TIAN Haige HUANG Thuo WU Chengyi (Material science and engineering school, university of science and technology Beijing, Beijing 100083, china) Univ of science and technology Beijing Beijing China

The fabrication of the high speed steel matrix composites reinforced by WC particles utilizing the ultrasonicgas atomization and spray-deposition was studied. The change of microstware and mechanical Properties of thecomposites added WC Particles were investigated and analyzed as well. As some results, the WC particles exhibit tWomorphologies (spherical and angular) with different content of WC particles; and with the increase of content of WCparticles, the hardness of the composites increases, yet the bending strength appears a trend of decreasing.

关键词： spray-deposition high speed steel composite

Global optimization of tool path for five-axis flank milling with a cylindrical cutter

在线全文

学校读者我要写书评

暂无评论

science china(Technological sciences) 2009年第8期52卷 2449-2459页

作者： DING Han1 & ZHU LiMin2 1 State Key Laboratory of Digital Manufacturing Equipment and technology, Huazhong university of science and technology, Wuhan 430074, china 2 school of mechanical engineering, Shanghai Jiao Tong university, Shanghai 200240, china State Key Laboratory of Digital Manufacturing Equipment and technology Huazhong University of Science and Technology Wuhan China school of mechanical engineering Shanghai Jiao Tong University Shanghai China

In this paper, optimum positioning of cylindrical cutter for five-axis flank milling of non-developable ruled surface is addressed from the perspective of surface approximation. Based on the developed interchangeability principle, global optimization of the five-axis tool path is modeled as approximation of the tool envelope surface to the data points on the design surface following the minimum zone criterion recommended by ANSI and ISO standards for tolerance evaluation. By using the signed point-to-surface distance function, tool path plannings for semi-finish and finish millings are formulated as two constrained optimization problems in a unified framework. Based on the second order Taylor approximation of the distance function, a sequential approximation algorithm along with a hierarchical algorithmic structure is developed for the optimization. Numerical examples are presented to confirm the validity of the proposed approach.

关键词： five-axis flank milling tool path optimization tool axis trajectory surface surface approximation distance function minimax optimization

Research on Vibration Properties of the Drill-punch Mechanism for Taphole Drill

在线全文

学校读者我要写书评

暂无评论

Journal of university of science and technology Beijing 2001年第4期8卷 311-313页

作者： Jianping Liu, Yongfang Liao 1) mechanical engineering school, university of science and technology Beijing. Beijing 100083, china 2) Shanghai Baoshan Iron & Steel Corporation. Shanghai 201914, china mechanical engineering school University of Science and Technology Beijing Beijing 100083 China Shanghai Baoshan Iron and Steel Corporation Shanghai 201914 China

A new type taphole drill was designed. The vibration properties of them drill-punch mechanism for the new type taphole drill were researched, the laws of its inherent characteristics were found. The measures to add punch amplitude and to reduce traverse vibration were put forward. The result showed that decreasing the frequency of vibration motors or increasing the stiffness of springs, and increasing excitation force can improve the vibration properties of the properties of the drill-punch mechanism.

关键词： taphole drill equipment in the cast house vibrating machinery