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Study on the Characteristics of Lithium Batteries with Different Load

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

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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Feature referenced tip localization enhanced by probability motion model for AFM based nanomanipulations

Feature referenced tip localization enhanced by probability ...

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2011 IEEE International Conference on robotics and Biomimetics, ROBIO 2011

作者： Yuan, Shuai Liu, Lianqing Wang, Zhidong Xi, Ning Wang, Yuechao Dong, Zaili Wang, Zhiyu Wang, Zhibo State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang Liaoning Province 110016 China College of Information and Control Engineering Shenyang Jianzhu University Shenyang 110168 China Graduate School of Chinese Academy of Sciences Beijing 100001 China Department of Electrical and Computer Engineering Michigan State University East Lansing MI 48823 United States Department of Advanced Robotics Chiba Institute of Technology Chiba Japan

ISBN: (纸本)9781457721373

The spatial uncertainties of tip positioning due to the nonlinearity of the PZT scanner and thermal drift hinder the further application of the AFM based nanomanipulation. This paper brings forward feature referenced tip localization enhanced by probability motion model to reduce the spatial uncertainties. An improved motion model is probabilistically built by incorporating the PI model, the creep model and the thermal drift model. For calibrating the accurate model parameters, the statistical experiments are designed and performed. Then the tip position is optimally estimated by combining with a local scan based feature sensing method. The simulation and corresponding experiments are performed to illustrate the validity and feasibility of the calibrated parameters and the algorithm. © 2011 IEEE.

关键词： Micromanipulators

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Development of linear servo control system for CNC machine tool based on DSP

Development of linear servo control system for CNC machine t...

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International Conference on Mechatronic Science, Electric Engineering and Computer

作者： Kaiyun Xu Ning Li Jian Lin Chuan He School of Automation Nanjing Institute of Technology Nanjing China Jiangsu Key Laboratory of Advanced Numerical Nanjing Institute of Technology Nanjing China School of Mechanical Engineering Changzhou University Changzhou China

ISBN: (纸本)9781612847191

The linear servo systems have the advantages of high velocity, precise servo feeding, excellent stability and rapidly dynamic performance, which can be used as the most promising high-performance feeding system for CNC (Computer Numerical Control) machine tools. According to the index demands of CNC machine tool for linear feeding system, the corresponding control system based on DSP (Digital Signal Processor) is designed in detail. The system employs DSP-TMS320F2812 as the control core, and an Intelligent Power Module (IPM) as the power driven circuit. This paper will mainly focus on the hardware structure and software program of linear servo control system, and the debugging work and experimental process are also introduced. The satisfactory results demonstrate that the proposed linear servo control system is feasible and reasonable, which can be applied in the CNC machine tools.

关键词： Servomotors Digital signal processing Computer numerical control Pulse width modulation Rectifiers Software

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Study on the toxicity and organic load of coated white board effluents

Study on the toxicity and organic load of coated white board...

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International Conference on Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM)

作者： He, Yixin Zhao, Yu Lei, Xiaochun Xue, Guoxin Tang, Yanjun Jin, Hang College of Material and Textiles Zhejiang Sci.-Tech. University Hangzhou 310018 China Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education Zhejiang Sci.-Tech. University Hangzhou 310018 China Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology Nanjing Forestry University Nanjing 210037 China School of Printing Engineering Hangzhou DianZi University Hangzhou 310018 China Engineering Research Center for Eco-Dyeing and Finishing of Textiles Ministry of Education Hangzhou 310018 China

ISBN: (纸本)9780769543505

With the rapid development of secondary fiber industry, more and more attention to the pollution discharge from its effluents and sludge were caused. The toxicity studies on coated white board effluents of secondary fiber were carried out by using optimized photo bacteria method. The results showed that the value of EC50 for acute toxicity in coated white board effluents, which were produced from liners effluents and compositive effluents, were 85.50% and 89.77% respectively, reached the level of Moderately Toxic, by contraries from barrier coating effluents, was 157.57%, belong to Non-Toxic Class. As far as a total organic load is concerned, the value were 63.120 kgCODcr/t paper, and the total TEF were 33.42 TU m3/t paper approximately, as well as equivalently 3.342g HgCl2/t papaer. Therefore, it should be pay more attention to the toxicity and toxicity emission load of coated white board effluents. © 2011 IEEE.

关键词： Toxicity

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Cyclic deformation behaviors of Ti-46Al-2Cr-2Nb-0.15B alloy during thermo-mechanical fatigue tests

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Transactions of Nonferrous Metals Society of China 2010年第11期20卷 2174-2180页

作者：项宏福戴安伦王冀恒李惠杨锐 Provincial Key Laboratory of Advanced Welding Technology Jiangsu University of Science and Technology Institute of Metal Research Chinese Academy of Sciences

Thermo-mechanical fatigue tests were carried out on the gamma-TiAl alloy in the temperature range of 500-800℃ under mechanical strain control m order to evaluate its cyclic deformation behaviors at elevated temperature. Cyclic deformation curves, stress-strain hysteresis loops under different temperature--strain cycles were analyzed and dislocation configurations were also observed by TEM. The mechanisms of cyclic hardening or softening during thermo-mechanical fatigue （TMF） tests were also discussed. Results showed that thermo-mechanical fatigue lives largely depended on the applied mechanical strain amplitudes, applied types of strain and temperature. On the hysteresis loops appeared two apparent asymmetries： one was zero asymmetry and the other was tensile and compressive asymmetry. Dislocations configuration and slip behaviors were contributed to cyclic hardening or cyclic softening.

关键词： titanium-aluminium alloy thermo-mechanical fatigue cyclic stress response hysteresis loop dislocation

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Image Recognition technology in Intelligent Cotton Harvesting Machine

Image Recognition Technology in Intelligent Cotton Harvestin...

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

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

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.

关键词： Cotton Transforms Joining processes Robots Machine vision Image color analysis Image recognition

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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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第八届IEEE信息与自动化国际会议(ICIC 2011)

作者： Jizhu Liu Peng Zhang Shaohua Wang Shuanghui Hao Tao Chen School of Mechanical and Electric Engineering Soochow University Suzhou Jiangsu ProvinceChina Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen guangdong ProvinceC School of Mechanical Engineering Harbin Institute of Technology Harbin Heilongjiang ProvinceChina 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 *** 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.

关键词： Autonomous Decentralized Control (ADC) Current Compensation Finite Element PMSM current compensation FINITE ELEMENT Stator windings transformer capacity Fault tolerance MUTUAL INDUCTANCE formula Decentralized Inductance

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Effect of rolling temperature on microstructure and texture of twin roll cast ZK60 magnesium alloy

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Transactions of Nonferrous Metals Society of China 2010年第11期20卷 2086-2091页

作者：陈洪美于化顺 Suk-bong KANG 闵光辉金云学 Provincial Key Lab of Advanced Welding Technology Jiangsu University of Science and Technology Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University Korea Institute of Materials Science

Twin roll cast ZK60 alloy strip/sheet with final thickness of 0.5 mm was prepared, and effect of rolling temperature on microstructure and texture development was investigated using OM and XRD technique, microstructure and texture were measured on specimens subjected to rolling experiment at different rolling temperature, and macrotexture was also evaluated by X-ray diffraction method. In addition, the （1010）and （0002） pole figures were measured, and the tensile test was performed to reveal the influence of rolling temperature on mechanical properties. The results show that the microstrucmre of ZK60 alloy sheet consisted of fibrous structure with elongated grains, and shear bands along the rolling direction after warm rolling. Dynamic recrystallization could be found during the warm rolling process at rolling temperature 350℃ and above. And many fine recrystallized grain could be observed in the shear bands area. It is a little difficult to see the recrystallized grain in the sheet warm rolled at 300℃ because of higher density of shear bands. The warm rolled ZK60 alloy sheet exhibited strong （0002） pole texture, the intensity of （0002） pole figure decreases with the increasing of rolling temperature and the basal pole tilted slightly to the transverse direction after warm rolling.

关键词： warm rolling microstructure macrotexture pole figure ZK60 alloy

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