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Industrial Experiment of Reducing Superheat of Steel by Nozzle Cooling

Journal of Iron and Steel Research International 2011年第6期18卷 22-25页

作者： YAN Hui-cheng QIU Sheng-tao TONG Tai-qin CAI Yun-teng WANG Zhong-ying ZHAO Pei State Key Laboratory of Advanced Steel Processing and Products Central Iron and Steel Research Institute Beijing 100081 China National Engineering Research Center of Continuous Casting Technology Central Iron and Steel Research Institute Eeijing 100081 China Huai Special Steel Co L.td Shasteel Group Huaian 211600 Jiangsu China

Nozzle cooling equipment is developed to supervise and control the heat flux by changing water flux. An in- dustrial experiment is held in billet caster in Huaigang . The results show that cooling control system works stably and effectively to control the heat fluxes by the temperature of copper tube. The superheat of steel in mould is reduced and the equiaxed crystal ratio, as well as compact degree of steel is raised.

关键词： nozzle cooling low superheat industrial experiment

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Image recognition technology in intelligent cotton harvesting machine

Image recognition technology in intelligent cotton harvestin...

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2011 International Conference on Information technology, Computer Engineering and Management Sciences, ICM 2011

作者： Wang, Mulan Li, Xiaoxia Liu, Kun Jiang, Rong Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Institute of Technology Nanjing 211167 China School of Mechanical Engineering Changzhou University Changzhou 213016 China School of Automation Nanjing Institute of Technology Nanjing 211167 China School of Mechanical Engineering Nanjing Institute of Technology Nanjing 211167 China

ISBN: (纸本)9780769545226

In view of the functional demands of the electrical control system for the intelligent cotton harvesting machine, the machine vision technology is employed. A cotton recognition method is proposed based on Hough transform. When the cottons gather together or overlap, the image data are partially lost or incomplete. To precisely identify the hidden cotton in the natural environment, firstly the image is segmented by R-B channel in RGB color model to reduce the computational complexity. Then the minimum external rectangle is obtained by labeling its region. Finally, contour information is acquired through the boundary trace approach in the effective region and the randomized Hough transform (RHT) method is realized according to the mathematic model of cotton contour. Results show that the recognition method is feasible when the amount of cotton contour information is lost less than 50%, which can meet the accuracy and speed requirements of target recognition for the intelligent cotton harvesting machine. © 2011 IEEE.

关键词： Cotton

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Two Linear Trinuclear Clusters with Bridging Triazole Ligand:Crystal Structure and Magnetism

Two Linear Trinuclear Clusters with Bridging Triazole Ligand...

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中国化学会第八届全国无机化学学术会议

作者： Jie Yang Yun-Sheng Ma Xiao-Yan Tang School of Chemistry & Materials Engineering Jiangsu Key Laboratory of Advanced Functional Materials Changshu Institute of Technology Changshu 215500 P.R.China School of Chemistry & Materials Engineering Jiangsu Key Laboratory of Advanced Functional Materials Changshu Institute of Technology

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Effects of Sb2O3 addition on dielectric properties of barium strontium titanate based ceramics

Effects of Sb2O3 addition on dielectric properties of barium...

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The 2nd International Conference on Applied Mechanics and Mechanical Engineering(ICAMME 2011)

作者： Chen Zhang Yuan-Fang Qu Provincial Key Lab.of Aduanced Welding Technology Jiangsu University of Science and Technology Key laboratory for advanced ceramics and machining technology of Ministry of Education Tianjin University

ISBN: (纸本)9783037951217

The dielectric properties of SbO-doped(BaSrNd)TiO ceramics fabricated by conventional solid state method were *** structure was identified by X-ray diffraction method and scanning electron microscope was also employed to observe the surface *** is confirmed that SbO-doped(BaSrNd)TiO ceramics exhibit perovskite structure and with increasing SbO content BaTiO(space group C2/c（15）) forms as a secondary *** experimental results reveal that the addition of SbO into(BaSrNd)TiO ceramics reduce the dielectric constant and Curie temperature due to the substitution for A/B-sites with Sb *** standing voltage increases with increasing SbOcontent while the dielectric loss and resistivity initially decrease and then increase with the increase of SbO *** temperature dependence of dielectric properties at different frequencies was studied as *** indicates that the tetragonal-cubic phase transition peak is suppressed as the SbO content increases and the peak value reduces with the increase of frequency.

关键词： Barium strontium titanate Perovskite Antimony oxide Dielectric properties

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Grinding wheel dressing technology for gear form grinding machine tools

Grinding wheel dressing technology for gear form grinding ma...

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International Conference on advanced technology of Design and Manufacture (ATDM 2011)

作者： Zuo Jianmin Wang Mulan He Chuan Zhang Sidi Jiangsu Teachers University of Technology Jiangsu Changzhou 213001 China Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Institute of Technology Nanjing Jiangsu 211167 China School of Mechanical Engineering Changzhou University Changzhou Jiangsu 213016 China Advanced Manufacturing Technology & Engineering Center Nanjing Institute of Technology Nanjing Jiangsu 211167 China

Gear form grinding technology is widely used in the process of gear manufacturing. Grinding wheel dressing is the key technology of gear form grinding process. In this paper, several different grinding wheel dressing methods and the corresponding diamond roller dressing device are simply introduced. The technical parameters of grinding wheel dressing are respectively analyzed, including dressing speed ratio, overlap ratio, dressing depth and axial speed. The experimental tests of gear form grinding are carried out to investigate the effects of dressing parameters on the grinding process. The results of analysis and manufacturing tests can provide the reliable basis for diamond roller dressing in gear form grinding machine tools.

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Virtual nano-hand: A stable pushing strategy in AFM based sensorless nanomanipulation

Virtual nano-hand: A stable pushing strategy in AFM based se...

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2011 IEEE International Conference on robotics and Biomimetics, ROBIO 2011

作者： Wang, Zhiyu Liu, Lianqing Hou, Jing Wang, Zhidong Yuan, Shuai Dong, Zaili State Key Laboratory of Robotics Shenyang Institute of Automation CAS Shenyang 110016 China Dept. of Advanced Robotics Chiba Institute of Technology Chiba Japan Faculty of Electrical and Control Engineering Liaoning Technical University Huludao 125105 China Graduate School of Chinese Academy of Sciences Beijing 100001 China College of Information Science and Engineering Northeastern University Shenyang 110004 China

ISBN: (纸本)9781457721373

One of the prerequisites for AFM based nanomanipulation is that the position of the target nanoparticle can be stable controlled within a known area, while this prerequisite is still hindered by the uncertainties including the initial position of the nanoparticle and of the AFM tip, together with the uncertain forces from the substrate and so on. In this paper, a Stochastic Pushing (SP) model and a Stable Pushing Strategy are proposed respectively, which can push the nanoparticle into a bounded target area within a given probability. Simulations and experiment based on the proposed SP model demonstrate the validity of the Stable Pushing Strategy. © 2011 IEEE.

关键词： Nanoparticles

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Research on mathematical model of autonomous decentralized PMSM and its current compensation during failure

Research on mathematical model of autonomous decentralized P...

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2011 International Conference on Information and Automation, ICIA 2011

作者： Liu, Jizhu Hao, Shuanghui Wang, Shaohua Zhang, Peng Chen, Tao School of Mechanical and Electric Engineering Soochow University Suzhou Jiangsu Province China School of Mechanical Engineering Harbin Institute of Technology Harbin Heilongjiang Province China Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen guangdong Province China State Key Laboratory of Transducer Technology Chinese Academy of Sciences Shanghai China

ISBN: (纸本)9781457702686

Permanent magnetic synchronous motor (PMSM) with high speed, large torque and high power usually employs centralized high power, which increases the capacity of the transformer, and reduces the reliability of the system, so the paper proposes a scheme based on an autonomous decentralized architecture, in which the stator winding uses distributed network structure, each coil of the winding is controlled by a separate driving controller, to improve the fault tolerance of the driving system. The paper deduces the formula for PMSM vector coordinate transformation, and the formula for motor self-inductance and mutual-inductance, as well as the motor voltage and electromagnetic torque model in decentralized architecture, taking a 8-pole 12-slot PMSM as example, establishes the mathematical model of current compensation with constant motor instantaneous electromagnetic torque before and after one or all coils of phase A are failed, finally tests the correctness of the current compensation model by using finite element simulating analysis and concrete experiments. © 2011 IEEE.

关键词： Synchronous motors

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Study on the Characteristics of Lithium Batteries with Different Load

Study on the Characteristics of Lithium Batteries with Diffe...

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2011 cross Strait Quad-Regional Radio Science and Wireless technology Conference(CSQRWC 2011)(2011年海峡两岸四地无线电科技研讨会)

作者： Ding Zuo wu Qu Min Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Institute of Technology 21 Department of Vehicle Engineering Nanjing Institute of Technology 211167 Nanjing China

ISBN: (纸本)9781424497928

Lead-acid batteries are widely used as backup power source in wireless base stations and as power source in electric *** determine the lithium battery's terminal limited discharge voltage and internal resistance with different loads, four 3.2V/60Ah lithium batteries are put in series to form a battery pack in tests. The lithium battery pack terminal voltage, current and overall internal resistance were recorded with the discharge time. By analyzing data from the tests with MATLAB, the lithium battery pack capacity, energy consumed by the load and the internal resistance were determined. The lithium battery pack t-U, t—I, t-AU/△t and t-ro graphs are drawn. From the graphs, it is shown that the limited discharge voltage of a single lithium battery is approximately 2.75V, and the internal resistance of a single lithium battery is approximately 0.75mii. The lithium battery pack current and the voltage change trends are the same when the load is constant, and the higher the load the less capacity the lithium battery pack can release. The energy consumed by internal resistance to the energy that lithium battery releases is higher as the load increases

关键词： electric vehicle lithium battery internal resistance discharge capability battery manage system

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A Convex Optimization Approach for Online Human Walking Motion Adaptation

A Convex Optimization Approach for Online Human Walking Moti...

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Workshop on Digital Media and Digital Content Management (DMDCM)

作者： Qing Tang Rong Xiong Jian Chu Changjiu Zhou State Key Laboratory of Industrial Control Technology University of Zhejiang Hangzhou China ARICC(Advanced Robotics and Intelligent Control Centre) Singapore polytechnics Singapore

For human-like locomotion, applying human motion capture data (HMCD) to the humanoid robot is a nature way. However, adapting HMCD online is a non-trivial problem. Not only because achieving both kinematic similarity and dynamic stability is difficult but also because such an optimization problem is intractable. This paper proposes an online adaptation approach using convex optimization for humanoid's walking motion, where the optimal objectives of kinematic similarity and dynamic stability can be simultaneously considered and easily balanced. With an inverted pendulum model based dynamics formulation of zero moment point (ZMP) in the framework of Lie group, the optimal objectives and constraints on both kinematics and dynamics are formulized into a second order cone programming problem. The simulation experiments show that the proposed method is promising for adapting HMCD online as well as simultaneously achieving and balancing the kinematic similarity and dynamic stability.

关键词： Joints Kinematics Mathematical model Equations Humanoid robots Dynamics Optimization

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Development of FPGA-based arithmetic module in CNC system

Development of FPGA-based arithmetic module in CNC system

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International Conference on Mechatronic Science, Electric Engineering and Computer

作者： Mulan Wang Xinghua Zhu Baosheng Wang Xiaoxia Li Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Institute of Technology Nanjing China School of Mechanical Engineering Changzhou University Changzhou China

Many complex computational problems have to be overcome in the Computer Numerical Control (CNC) system, such as tool compensation calculation, contour interpolation, speed decomposition, position control and so on. If all the functions are accomplished by software, the corresponding execution time will affect the velocity of the CNC system. This paper has put forward a scheme of software hardening technique based on FPGA (Flied Programmable Gate Array), and developed an independent arithmetic calculating module for CNC system to improve the feed-rate of machine tool. VHSIC Hardware Description Language (VHDL) is adopted in Quartus II 9.0 development environment, based on FPGA chip of Altera company CYCLONE II series. Several algorithm operation processes relating to complex calculation are introduced in detail, such as addition, subtraction, multiplication and division operation of floating-point numbers. The simulation results prove that the proposed design methods of the arithmetic module are feasible and reasonable, which can also enhance the portability and applicability of floating-point calculating module in CNC system.

关键词： Computer numerical control Field programmable gate arrays Integrated circuit modeling Software Simulation Registers Hardware

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