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2010 International Conference on Mechanic Automation and control engineering, MACE2010

作者： He, Zhenya Fu, Jianzhong Yao, Xinhua Qian, Wenjie Zhejiang University State Key Lab. of Fluid Power Transmission and Control Department of Mechanical Engineering Hangzhou 310027 China

ISBN: (纸本)9781424477388

To reduce the influence of the geometric error on machining precision of CNC machine, a new method based on multi-body system theory and the laser sequential step diagonal vector measurement method to distinguish the geometric errors of CNC machine tool was presented. Firstly geometric errors modeling of CNC machine tool based on multi-body system theory was established. Then laser sequential step diagonal vector measurement method was introduced. Finally comparison experiments of the directly traditional method and the laser vector diagonal measurement method were done, besides, error compensation experiment of CNC machine tool was done. The results show that the new method combined multi-body system theory and laser sequential step diagonal vector measurement method is feasible to distinguish the geometric errors and after compensation machine accuracy is improved by 63%. ©2010 IEEE.

关键词： Vectors

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Evaluation on railway passenger service quality using comprehensive fuzzy evaluation model and neural network

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Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) 2011年第SUPPL. 1期42卷 72-78页

作者： Ji, Hai-Yan Xing, Zong-Yi Qin, Yong Jia, Li-Min Wu, Guo-Jun School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 China State Key Lab. of Traffic Control and Safety Beijing Jiaotong University Beijing 100044 China Passenger Transport Department of Shanghai Railway Bureau Nanjing 210094 China

To evaluate railway passenger service quality objectively and precisely, an evaluation index system was established based on analysis of the relevant factors, i.e., security, punctuality, economy, convenience and comfort. Then two evaluation approaches were proposed based on the comprehensive fuzzy evaluation model and neural network. Finally the proposed approaches were illustrated to evaluate the service quality in Nanjing Station based on questionnaire investigation. The results show that the proposed methods can evaluate service quality effectively and successfully, and that the approaches can provide theoretical basis for improving and enhancing railway passenger service quality.

关键词： Quality control

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Tension control system for spin-draw-winder used in vacuum coating

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Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology 2011年第1期31卷 44-49页

作者： Zhao, Yang Fan, Duowang Kong, Linggang Li, Yanzhe State Green Coating Technology and Equipment Engineering and Technology Research Centre Lanzhou 730070 China Educ. Min. Key Lab. of Opt-Electronic Technol. and Intelligent Control Lanzhou Jiaotong Univ. Lanzhou 730070 China

A novel technique has been successfully developed to automatically control the membrane tension induced by the spin-draw-winder used in vacuum coating on polymer materials on industrial scale. First, the realistic tension of different sheet materials was modeled and simulated;next, the major impacts on tension were analyzed, and finally, an indirect tension control algorithm was developed. On the basis of the simulation, a dedicated tension control system was designed, constructed and tested, which turns out to be capable of setting up and control of the sheet tension. The tension control unit was repeatedly tested in vacuum coating on a variety of plastic materials with satisfactory results. Its strengths include easy operation, simple structure, high control precision, fast response, and good stability.

关键词： Vacuum applications

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Evaluation of cascading failure in power system based on the operational reliability theory

Evaluation of cascading failure in power system based on the...

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2010 IEEE 11th International Conference on Probabilistic Methods Applied to Power Systems, PMAPS 2010

作者： Zou, Xin Cheng, Lin Sun, Yuanzhang Department of Electrical Engineering State Key Lab. of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Beijing China

ISBN: (纸本)9781424457236

According to the characteristics of the cascading failures in power grid, a lot of assessment methods based on the probability theory have been proposed in recent years. However, most of them ignore the influence of the changing operating conditions on the power system planning and operation. This paper assesses the risk of the cascading failure in the power system based on the operational reliability theory which considering the variation of operating states and environment of the power system. The operational reliability of the power system is calculated based on Markov Process which describes the transient probability of states. The key conception of this theory is that the failure rate and the probability of components are changing along with the life of the equipment, the operating states and the environment conditions. A new evaluation procedure is brought up to calculate the operational reliability indices which can provide the specific information of the cascading failure. The evaluating results of the test system confirm that this approach is applicable to analyze the cascading failures in real power system. ©2010 IEEE.

关键词： Reliability theory

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RETRACTED ARTICLE: Design and simulation on a novel electrohydraulic file-manufacturing system

RETRACTED ARTICLE: Design and simulation on a novel electroh...

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2010 International Conference on Computer Modeling and Simulation, ICCMS 2010

作者： Li, Qipeng Ding, Fan School of Mechanical and Automotive Engineering Zhejiang University of Science and Technology Hangzhou China State Key Lab. of Fluid Power Transmission and Control Zhejiang University Hangzhou China

ISBN: (纸本)9780769539416

This paper puts forward the concept of digital hydraulic file-manufacturing, by combining technologies of high-speed on/off solenoid valve, hydraulic impacting phenomenon and digital electronics. First, the system design and the manufacturing principle are introduced, and then simulations are carried out under AMESim to observe the impacting procedure. Furthermore, discussion of key factors influencing the energy efficiency of the system is provided plus key parameters influencing the dynamic characteristics of the high-speed on/off solenoid valve. The results indicate that the new file- manufacturing approach is energy-saving and low cost. © 2010 IEEE.

关键词： Manufacture

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Numerical simulation and model test study of stability of surrounding rock for deep tunnel

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Yantu Lixue/Rock and Soil Mechanics 2011年第SUPPL.2期32卷 615-620页

作者： Chen, Hao Ren, Wei-Zhong Li, Dan Xia, Bin-Wei State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China College of Urban Construction Wuhan University of Science and Technology Wuhan 430065 China China Educ. Min. Key Lab. for Exploitation of Southwest Resources and Environ. Disaster Control Eng. Chongqing University Chongqing 400030 China

The physical model test of a tunnel is made on the triaxial model-test machine. The whole failure process is observed by applying full inner-spy photograph technology;with it the deformation and crack extension of key parts are studied. By using the strain measure technology, the strains of key parts of the surrounding rock are measured;according to this, the variability of the stresses of surrounding rock is studied. The measured values of the main physical and mechanical indices of the model material are closed to the theoretical values. Based on the mechanical property of the model material, the Mohr-Coulomb criterion with tension cut-off strain-softening model is established. The numerical simulation are worked with the same boundary condition as the model test;according to this, the plastic zone and the stress field of the surrounding rock are studied. We compare the failure process and the variation of stress of the surrounding rock of the model test with the numerical simulation and draw the conclusion that the two processes coincide with each other.

关键词： Strain

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Multi-channel assignment in wireless sensor networks: A game theoretic approach

Multi-channel assignment in wireless sensor networks: A game...

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IEEE INFOCOM 2010

作者： Yu, Qing Chen, Jiming Fan, Yanfei Shen, Xuemin Sun, Youxian State Key Lab. of Industrial Control Technology Zhejiang University Hangzhou 310027 China Department of Electrical and Computer Engineering University of Waterloo Waterloo ON N2L 3G1 Canada

ISBN: (纸本)9781424458363

In this paper, we formulate multi-channel assignment in Wireless Sensor Networks (WSNs) as an optimization problem and show it is NP-hard. We then propose a distributed Game Based Channel Assignment algorithm (GBCA) to solve the problem. GBCA takes into account both the network topology information and transmission routing information. We prove that there exists at least one Nash Equilibrium in the channel assignment game. Furthermore, we analyze the sub-optimality of Nash Equilibrium and the convergence of the Best Response in the game. Simulation results are given to demonstrate that GBCA can reduce interference significantly and achieve satisfactory network performance in terms of delivery ratio, throughput, channel access delay and energy consumption. ©2010 IEEE.

关键词： Wireless sensor networks

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Experiments on autonomous mobile sensor control for target tracking

Experiments on autonomous mobile sensor control for target t...

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2010 IEEE International Symposium on "A World of Wireless, Mobile and Multimedia Networks", WoWMoM 2010

作者： Li, Hongbin Zhang, Fan Chen, Jiming Sun, Youxian State Key Lab. of Industrial Control Technology Zhejiang University Hangzhou 310027 China Department of Electrical and Computer Engineering University of Waterloo Waterloo ON N2L 3G1 Canada

ISBN: (纸本)9781424472659

Technology advancements in robotics and communication make it possible to combine mobility and static wireless sensor networks. Being able to locomote enables sensors to (1) adjust their positions for better sensing quality, (2) ensure field coverage by spreading out and (3) fill up communication gap to guarantee information sharing in wireless environment. Concerning the above three criteria, we propose a autonomous management scheme for mobile sensors, aims to achieve distributed sensor position control. Accordingly, we developed a testbed for mobile sensor network verification, with good interfaces to obtain ranging measurements and control sensor motion. Implementation details of building static and mobile sensors are given. Finally we present experiment results to verify the proposed sensor control scheme. ©2010 IEEE.

关键词： Target tracking

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Research on traffic organization and command support system under the emergency

Research on traffic organization and command support system ...

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2nd International Conference on Information Science and engineering, ICISE2010

作者： Tian, Rui Yang, Zhaosheng Zhang, Maolei College of Traffic and Transportation State Key Lab. of Automobile Dynamic Simulation Jilin University Changchun Jilin 130022 China Department of Traffic Info Engineering and Control Nanling Campus Jilin University Changchun Jilin 130022 China

ISBN: (纸本)9781424480968

For the problem of emergency traffic organization, designed the architecture of traffic emergency organization and command support system. Firstly analysised the emergency transportation organizational processes in-depth, and then put forward the route and possible projects of emergency traffic organization program. Finally, designed a traffic organization and command support system, and requested the system structure and function, and definitude the flow of traffic organization and command. © 2010 IEEE.

关键词： Transportation routes

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Method of road traffic accidents causes analysis based on data mining

Method of road traffic accidents causes analysis based on da...

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International Conference on Computational Intelligence and Software engineering

作者： Tian, Rui Yang, Zhaosheng Zhang, Maolei College of Traffic and Transportation State Key Lab. of Automobile Dynamic Simulation Jilin University Changchun Jilin 130022 China Department of Traffic Info. Engineering and Control Nanling Campus of Jilin University Changchun Jilin 130022 China

ISBN: (纸本)9781424453924

Aiming at the phenomenon of road traffic accident frequency, a method of road traffic accidents causes analysis based on data mining was put forward. First analyzed the related attributes and causes of road traffic accidents. Then introduced two kinds of basic theory of data mining : rough sets theory and the theory of association rules. Finally proposed the method of road traffic accidents causes analysis based on data mining. Using the method of traffic data analysis, can improve the road traffic safety management level effectively. ©2010 IEEE.

关键词： Data mining

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