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IEEE International Conference on Engineering Management (EMC)

作者： B. Kopacek P. Kopacek M. Ceccarelli E. Hajrizi L. Stapleton SAT AUSTRIAN SOCIETY FOR SYSTEMS ENGIONEERING AND AUTOMATION AUSTRIA IHRT VIENNA UNIVERSITY OF TECHNOLOGY AUSTRIA LARM: LABORATORY OF ROBOTICS AND MECHATRONICS UNIVERSITY OF CASSINO ITALY UBT UNIVERSITY OF BUSINESS AND TECHNOLOGY PRISTINA ISOL RESEARCH CENTRE WATERFORD INSTITUTE OF TECHNOLOGY REPUBLIC OF IRELAND

Emerging economies in the midst of fundamental restructuring of higher education can benefit from radical approaches to engineering education programme design. The authors present the case of the development of a BSc curriculum in mechatronics Management for one of the new international universities in Kosovo in order to demonstrate that it is possible to develop higher-education programmes in advanced engineering, which have local economic context in an emerging economy. The authors illustrate how it is possible to use theories of engineering and technology professional competence to develop a coherent higher education programme which has the potential to deliver on aggressive economic and educational objectives.

关键词： mechatronics Education Laboratories Robots Business Sensors Software

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Vibration and buckling of a carbon nanotube inserted with a carbon chain

Vibration and buckling of a carbon nanotube inserted with a ...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Zhili Hu X.M. Guo Johan Liu Key Laboratory of Advanced Display and System Applications Ministry of Education & SMIT Center School of Mechatronics Engineering and Automation Shanghai University Shanghai China Shanghai Institute of Applied Mathematics and Mechanics Shanghai University China SMIT Center & Bionano Systems Laboratory Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden

An elastic string-elastic shell model is developed to study vibration behaviors of a carbon nanowire. The present model predicts that non-coaxial vibration between the C-chain and the innermost tube does not occur due to negligible bending rigidity of the C-chain. In addition, it is found that the C-chain has most significant effect on the lowest frequency associated with radial vibration mode for circumferential wave-number 2 (n=2). In particular, the effect of the C-chain on axisymmetric radial breathing frequencies (n=0) predicted by the present model is found to be in reasonable agreement with known experimental and modeling results available in the literature.

关键词： Electron tubes Mathematical model Vibrations Equations Strain Carbon Force

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Numerical investigation on the effect of filler distribution on effective thermal conductivity of thermal interface material

Numerical investigation on the effect of filler distribution...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Cong Yue Yan Zhang Johan Liu Zhaonian Cheng Jing-yu Fan Key Laboratory of Advanced Display and System Applications Ministry of Education & SMIT Center School of Mechatronics Engineering and Automation Shanghai University Shanghai China SMIT Center & Bionano Systems Laboratory Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai China

Thermal interface materials have been widely adopted in the thermal management for electronics system. Most of the thermal interface materials are made of polymers with thermally conductive particles distributed inside to enhance the thermal conductivity. Thus it is essential to figure out the effective thermal conductivity of this composite material. In the present paper, a parameterized cubic cell model had been developed and implemented by the finite element method. The numerical simulations were carried out to investigate the effect of the filler distributions on the effective thermal conductivity of the thermal interface materials. The volume percentage loadings of the particles ranging from 13% to 74% had been considered, and different particle distribution patterns had also been analyzed. The simulation results were compared with the experimental data as well as other models. A fairly good agreement was obtained for the particle volume percentage loading under consideration, which verified the developed cubic cell model.

关键词： Thermal conductivity Conductivity Materials Mathematical model Electronic packaging thermal management Numerical models Finite element methods

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Effect of encapsulation on OLED characteristics with anisotropic conductive adhesive

Effect of encapsulation on OLED characteristics with anisotr...

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Electronics System-Integration Technology Conference, ESTC

作者： Yan Zhang Mans Andreasson Johan Liu Thorvald Andersson Hsuan-Yi Liao Itsuo Watanabe Key Laboratory of Advanced Display and System Applications Ministry of Education & SMIT Center School of Mechatronics Engineering and Automation Shanghai University Shanghai China Applied seminconductor Physics Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden SMIT Center Bionano Systems Laboratory Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden Advanced Interconnect Material Division Hitachi Chemical Company Limited Chikusei Ibaraki Japan

Organic light emitting devices (OLEDs) is one of the most potentially interesting display technologies in the flat panel display (FPD) field. This paper investigates the effects of OLED structures and a perimeter encapsulation to protect the OLED from atmospheric exposure. Firstly, the electric features of the OLED devices with and without a copper phtalocyanine layer were measured, and the one with the additional buffer layer showed a lower turn-on voltage. Then the OLED device sample was encapsulated with a glass cover bonded to the substrate with an adhesive matrix containing micro-particles. The samples were stored in ambient conditions, and the IV characteristics were studied with shelf-time as a parameter. The measurement results indicated that the encapsulation had a significant improvement on the device operation. After two weeks of storage the encapsulated samples showed less degradation and the current density at a given operating bias was about fifty percent higher than without encapsulation.

关键词： Encapsulation Organic light emitting diodes Anisotropic magnetoresistance Conductive adhesives Flat panel displays Protection Copper Atmospheric measurements Electric variables measurement Buffer layers

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Combating dephasing decoherence by periodically performing tracking control and projective measurement

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Physical Review A 2007年第4期76卷 042335-042335页

作者： Ming Zhang Hong Yi Dai Zairong Xi Hong Wei Xie Dewen Hu College of Mechatronics and Automation National University of Defense Technology Changsha 410073 China Key Laboratory of Systems and Control Chinese Academy of Sciences Beijing 100080 China College of Science National University of Defense Technology Changsha 410073 China

We propose a scheme to overcome phase damping decoherence by periodically performing open loop tracking control and projective measurement. Although it is impossible to stabilize a qubit subject to Markovian dynamics only by open loop coherent control, one can attain a “softened” control goal with the help of periodical projective measurement. The “softened” control objective in our scheme is to keep the state of the controlled qubit to stay near a reference pure state with a high probability for a sufficiently long time. Two suboptimal control problems are given in the sense of trace distance and fidelity, respectively, and they are eventually reduced to the design of a period T. In our scheme, one can choose the period T as long as possible if the “softened” control goal is attained. This is in contrast to the observation that quantum Zeno effect takes place only if measurements are performed in a very frequent manner, i.e., the period T must be extremely small.

关键词： QUANTUM-systems MACROSCOPIC COHERENCE DYNAMICS FEEDBACK COMPUTATION EVOLUTION CAVITIES STATE CODES

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TRACKING CONTROL IN THE PRESENCE OF NONLINEAR DYNAMIC FRICTIONAL EFFECTS: ROBOT EXTENSION

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Asian Journal of Control 2008年第3期1卷

作者： M. Feemster D.M. Dawson A. Behal W. Dixon Matthew Feemster received the B.S degree in Electrical Engineering from Clemson University Clemson South Carolina in December 1994. Upon graduation he remained at Clemson University and received the M.S. degree in Electrical Engineering in 1997. During this time he also served as a research/teaching assistant. His research work focused on the design and implementation of various nonlinear control algorithms with emphasis on the induction motor and mechanical systems with friction present. He is currently working toward his Ph.D. degree in Electrical Engineering at Clemson University. Darren M. Dawson was born in 1962 in Macon Georgia. He received an Associate Degree in Mathematics from Macon Junior College in 1982 and a B.S. Degree in Electrical Engineering from the Georgia Institute of Technology in 1984. He then worked for Westinghouse as a control engineer from 1985 to 1987. In 1987 he returned to the Georgia Institute of Technology where he received the Ph.D. Degree in Electrical Engineering in March 1990. During this time he also served as a research/teaching assistant. In July 1990 he joined the Electrical and Computer Engineering Department and the Center for Advanced Manufacturing (CAM) at Clemson University where he currently holds the position of Professor. Under the CAM director's supervision he currently leads the Robotics and Manufacturing Automation Laboratory which is jointly operated by the Electrical and Mechanical Engineering departments. His main research interests are in the fields of nonlinear based robust adaptive and learning control with application to electro-mechanical systems including robot manipulators motor drives magnetic bearings flexible cables flexible beams and high-speed transport systems. Aman Behal was born in India in 1973. He received his Masters Degree in Electrical Engineering from Indian Institute of Technology Bombay in 1996. He is currently working towards a Ph.D in Controls and Robotics at Clemson University. His research focuses on the control of no

In this paper, we extend the observer/control strategies previously published in [25] to an n -link, serially connected, direct drive, rigid link, revolute robot operating in the presence of nonlinear friction effects modeled by the Lu-Gre model. In addition, we also present a new adaptive control technique for compensating for the nonlinear parameterizable Stribeck effects. Specifically, an adaptive observer/controller scheme is developed which contains a feedforward approximation of the Stribeck effects. This feedforward approximation is used in a composite controller/observer strategy which forces the average square integral of the position tracking error to an arbitrarily small value. Experimental results are included to illustrate the performance of the proposed controllers.

关键词： Friction compensation nonlinear control

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A holonic architecture for reconfigurable manufacturing systems

A holonic architecture for reconfigurable manufacturing syst...

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IEEE International Conference on Industrial Technology (ICIT)

作者： Fang Wang De Xu Min Tan Zhihui Wan Laboratory of Complex Systems and Intelligent Science Institute of Automation Chinese Academy and Sciences Beijing China Mechatronics Engineering Department East China Institute of Technology Nanchang China

A holonic architecture is proposed for reconfigurable manufacturing systems based on the reference architecture PROSA. Considering the feature of reconfigurable manufacturing systems, configuration holon is introduced as a basic type of holons besides resource holon, product holon and order holon held by PROSA. The basic structure of this holonic architecture, the basic holons and interactions between holons are described in detail. Finally the conclusions and the future work are given.

关键词： Manufacturing systems Production systems Control systems Intelligent manufacturing systems Optimized production technology Costs Design optimization Product design Resource management Maintenance

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Solution to the general robust strictly positive real synthesis problem for polynomial segments

Solution to the general robust strictly positive real synthe...

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2003 European Control Conference, ECC 2003

作者： Yu, Wensheng Wang, Long Ackermann, Jürgen Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing100080 China Center for Systems and Control Department of Mechanics and Engineering Science Peking University Beijing100871 China Robust Control Group Institute of Robotics and Mechatronics German Aerospace Center DLR-Oberpfaffenhofen Postfach 1116 WesslingD-82230 Germany

For any two n-th order polynomials a(s) and b(s), the Hurwitz stability of their convex combination is necessary and sufficient for the existence of a polynomial c(s) such that c(s)/a(s) and c(s)/b(s) are both strictl... 详细信息

ISBN: (纸本)9783952417379

关键词： Polynomials

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MOBILE ROBOT LOCALIZATION USING A SINGLE ROTATING SONAR AND 2 PASSIVE CYLINDRICAL BEACONS

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ROBOTICA 1995年第3期13卷 243-252页

作者： BEOM, HR CHO, HS Research & Development Laboratory Gold Star Industrial Systems CO. Ltd. Anyang (Korea). Center for Robotics and Automation Department of Precision Engineering and Mechatronics Korea Advanced Institute of Science and Technology373–1 Kusong-dongTaejeon305–701 (Korea).

This paper proposes a new method of estimating the position and heading angle of a mobile robot moving on a flat surface. The proposed localization method utilizes two passive beacons and a single rotating ultrasonic sensor. The passive beacons consist of two cylinders with different diameters and reflect the ultrasonic pulses coming from the sonar sensor mounted on the mobile robot. The sonar sensor, again, mounted on a pan-tilt device then receives the reflected pulses while scanning over a wide area. The geometric parameter set of beacon is acquired from the sonar scan data obtained at a single mobile robot location using a new data processing algorithm. The presented algorithm is especially suitable for processing the sonar scan data obtained by ultrasonic sensor with wide beam spread. From this parameter set, the position and heading angle of the mobile robot is determined directly. The performance and validity of the proposed method are evaluated using two beacons and a single sonar sensor attached at the pan-tilt device mounted on a mobile robot, named LCAR, in our laboratory.

关键词： MOBILE ROBOT SONAR BEACON LOCALIZATION

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