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Summer computer simulation Conference, SCSC 2014, Part of the 2014 Summer simulation Multiconference, SummerSim 2014

作者： Rozenblit, J.W. Feng, C. Riojas, M. Napalkova, L. Hamilton, A.J. Hong, M. Berthet-Rayne, P. Czapiewski, P. Hwang, G. Nikodem, J. Shankaran, A. Rao, A. University of Arizona Department of Electrical and Computer Engineering TucsonAZ United States Department of Surgery Arizona Simulation Technology and Education Center TucsonAZ United States Autonomous University of Barcelona Department of Telecommunication and System Engineering Sabadell Barcelona Spain Manufacturing Systems Solutions LLC St. PaulMN United States Faculty of Electronics Wroclaw University of Technology Wroclaw Poland

ISBN: (纸本)9781632667335

This paper describes a system developed to assist in model-based training of minimally invasive, laparoscopic procedures. The key factor motivating the development of the device called CAST (computer-Assisted Surgical Trainer) is the need to improve the state-of-the-art in teaching laparoscopy, and ultimately achieve better surgical outcomes. CAST's design concept and architecture is presented with its major elements that facilitate guided (both haptic and visual) execution of tasks, performance assessment, and comparative analysis of results. Both software and hardware models and implementations are given. The system, while currently intended for off-line, laboratory use, has an excellent potential for real-time assistive functions in the operating room.

关键词： Augmented reality

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A versatile dual sided spectrum analyzer for protective relaying and electric machine condition monitoring

A versatile dual sided spectrum analyzer for protective rela...

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International Conference on Advances in Energy Conversion Technologies (ICAECT)

作者： Yaju Jadeja Subhasis Nandi T. Aaron Gulliver Thirumarai C. Ilamparithi Department of Electrical and Computer Engineering University of Victoria Victoria BC Canada Electrical Modelling and Simulation Team OPAL-RT Technologies Montreal Canada

Protective relaying is extremely important for reliable operation of power systems with minimal interruption. It saves equipment by limiting current, voltage and power variations due to faults. One essential component of protective relaying is symmetrical component analysis. This monitors the positive and negative sequence components of voltages and currents. These components are also important for condition monitoring of rotating electrical machines. It is shown in this paper that these components can easily be obtained from the double sided spectrum analysis of the complex valued signals. Apart from the standard fast Fourier transform (FFT), advanced techniques such as Park's vector analysis and residual estimation can also be used in the detection of faults. Thus an on-line, realtime instrument that displays these quantities would be very useful. In this paper, the development of such an instrument is presented. It can monitor sequence quantities and locate various characteristic fault frequencies and signature patterns in single and three phase machines. It also has a user friendly interface that is based on MATLAB 1 . The instrument was successfully tested on three-phase synchronous and induction machines. The performance is demonstrated by detecting eccentricity faults in salient pole synchronous machines. As commercially available spectrum analyzers cannot yet provide this level of functionality, this is a very useful instrument for practicing power engineers.

关键词： Stators Instruments MATLAB Rotors Condition monitoring Vectors

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A GPU-based Parallel simulation Platform for Large-scale Wind Farm Integration

A GPU-based Parallel Simulation Platform for Large-scale Win...

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IEEE PES Transmission and Distribution Conference and Exposition

作者： Haixiang Gao Ying Chen Yin Xu Zhitong Yu Laijun Chen State Key Laboratory of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University School of Electrical Engineering and Computer Science Washington State University

ISBN: (纸本)9781479936571

Due to the energy crisis of the next fifty years, an increasing number of large-scale wind farms are integrating into power systems. Parallel simulation platforms are indispensable to evaluate the effects of wind farm integration. A GPU-based parallel simulation platform is constructed in this paper to test the feasibility of simulating integration systems on GPU. By adopting previous research work such as averaged model and improved EMTP algorithm, models and algorithm of the platform are firstly introduced. Then the hardware and software architecture of the platform are put forward, which combine CPU configuration and GPU computing. Finally, a wind farm with different numbers of DFIGs are used to test the performance of the platform. Results show that the platform has excellent accuracy, efficiency and scalability. The work of this paper proves the feasibility to simulate wind farm integrating dynamics adopting GPU and its potential to reach tremendous efficiency and scalability.

关键词： Power system simulation Power system modelling

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On the shortest path planning for the carangiform robotic fish

On the shortest path planning for the carangiform robotic fi...

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Chinese Control Conference (CCC)

作者： Chang Liu Songlin Chen Jianxun Wang Xiaobo Tan Control and Simulation Center Harbin Institute of Technology Harbin Heilongjiang CN Department of Electrical and Computer Engineering Michigan State University East Lansing MI USA

Considering the under-actuated characteristic of the carangiform robotic fish whose forward movement and turning are carried out by its single caudal fin, this paper investigates its shortest path planning problem subjected to the terminal constrains. First, a simplified kinematics model is proposed in view of its locomotion characteristic. With this model, the shortest path planning is transformed into the shortest time optimal control problem and the maximum principle is employed to obtain the necessary condition. Furthermore, based on the analysis on the relationship between the length of all feasible paths and the terminal condition, the sufficient and necessary conditions are derived for the shortest path under any terminal constrains. Finally, a program developed with Matlab verifies the effectiveness of the proposed results.

关键词： Marine animals Robot kinematics Path planning Turning Field-flow fractionation Electronic mail

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The computer Assisted Surgical Trainer: Design, Models, and Implementation 14

The Computer Assisted Surgical Trainer: Design, Models, and ...

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simulation Multiconference

作者： J. W. Rozenblit C. Feng M. Riojas L. Napalkova A. J. Hamilton M. Hong P. Berthet-Rayne P. Czapiewski G. Hwang J. Nikodem A. Shankaran A. Rao The University of Arizona Department of Electrical and Computer Engineering Autonomous University of Barcelona Department of Telecommunication and System Engineering Department of Surgery Arizona Simulation Technology and Education Center Manufacturing Systems Solutions LLC Faculty of Electronics Wroclaw University of Technology

ISBN: (纸本)9781632667335

关键词： Surgical Training Laparoscopy Augmented Reality computer-Guided Navigation Cognitive Models surgical training augmented reality Laparoscopy Cognitive Maps computers Trainers computer-assisted Design models design concept major elements Castings Surgery Operating rooms

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A multi-paradigm decision modeling framework for combat system effectiveness measurement based on domain-specific modeling

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Journal of Zhejiang University-Science C(computers and Electronics) 2013年第5期14卷 311-331页

作者： Xiao-bo LI Yong-lin LEI Hans VANGHELUWE Wei-ping WANG Qun LI Institute of Simulation Engineering College of Information Systems and ManagementNational University of Defense Technology Department of Mathematics and Computer Science University of Antwerp

Decision modeling is an essential part of the combat system effectiveness simulation (CoSES), which needs to cope with the cognitive quality, diversity, flexibility, and higher abstraction of decision making. In this paper, a multi-paradigm decision modeling framework is proposed to support decision modeling at three levels of abstraction based on domain-specific modeling (DSM). This framework designs a domain-specific modeling language (DSML) for decision modeling to raise the abstraction level of modeling, transforms the domain-specific models to formalism-based models to enable formal analysis and early verification and validation, and implements the semantics of the DSML based on a Python scripts framework which incorporates the decision model into the whole simulation system. The case study shows that the proposed approach incorporates domain expertise and facilitates domain modeler's participation in CoSES to formulate the problem using DSML in the problem domain, and enables formal analysis and automatic implementation of the decision model in the solution domain.

关键词： Multi-paradigm modeling (MPM) Decision modeling Domain-specific modeling (DSM) Effectiveness measurement Model transformation

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Finite Element Analysis of Non-axisymmetric Stretch Flanging Process for Prediction of Location of Failure

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Procedia Materials Science 2014年 5卷 2054-2062页

作者： Yogesh Dewang M.S. Hora S.K. Panthi Research Scholar Department of Mechanical EngineeringMaulana Azad National Institute of Technology Bhopal462051 India Professor Department of Civil EngineeringMaulana Azad National Institute of Technology Bhopal 462051 India Scientist Computer Simulation & Design CentreAdvanced Materials Processes and Research InstituteBhopal462064 India

Stretch flanging is an important sheet metal forming process which is applied in automotive industry. In this paper, finite element simulation of stretch flanging process of AA 5052 has been carried out. It is found that both punch-die clearance and initial flange length has great effect on strain distribution and edge cracking along die profile radius. A good agreement has been obtained between results of simulation and experimental results, in terms of edge crack, punch load and punch stroke. From this investigation, finite element simulation is found to be quite useful in predicting deformation behavior of stretch flange quite efficiently.

关键词： Stretch Flanging finite element simulation punch-die clearance initial flange length edge crack strain

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Automated image-guided surgery for common and complex dental implants

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Journal of Medical engineering and Technology 2014年第5期38卷 251-259页

作者： Sun, Xiaoyan Yoon, Yongki Li, Jiang McKenzie, Frederic D. School of Information Science and Engineering Hangzhou Normal University Hangzhou China Whirlpool Corporation Benton Harbor MI United States Department of Electrical and Computer Engineering Old Dominion University Norfolk VA United States Department of Modeling Simulation and Visualization Engineering Old Dominion University Norfolk VA United States

Dental implantation is now recognized as a standard of care for replacing missing teeth. Pre-operative planning with patient-specific images provides the basis for precise surgery, but such accuracy is hampered to some degree because of the manual drilling procedures performed by the surgeon. In this paper, a robotic system for automated site preparation for dental implants is presented in order to provide high accuracy drilling. The results of some experiments are given to validate the system. Additionally, results are shown for jaw surgery that utilize natural-root-formed implants which can contain multiple roots. This more complex type of implant is impossible to drill manually but can provide better long-term stability and success. With this robotic system, controlled and accurate drilling was achieved, which made more advanced implant designs possible. © 2014 Informa UK Ltd.

关键词： Dental prostheses

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Identification of inactive constraints for SCED model considering uncertain power injection

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Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical engineering 2014年第34期34卷 6050-6057页

作者： Ding, Tao Bo, Rui Guo, Qinglai Sun, Hongbin Huang, Can Li, Fangxing State Key Lab of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing100084 China Midwest ISO St. Paul MN55108 United States Department of Electrical Engineering and Computer Science The University of Tennessee Knoxville TN37996 United States

With the constant expansion of power grid, a large number of security constraints have put tremendous challenges to the online economic dispatch. An efficient tool to eliminate the inactive constraints becomes necessary for security constraints economic dispatch (SCED) in large power systems. In this paper, considering the uncertainty of renewable energy integration, a fast and effective method to identify the inactive security constraints was proposed. Firstly, the definition of uncertain inactive security constraints and a necessary and sufficient condition to identify those were presented respectively. Considering the time-consuming identification, we relaxed the feasible region of original SCED model and utilized greedy algorithm to quickly eliminate part of inactive constraints. Then another necessary and sufficient condition was proposed and verified, where the remaining inactive constraints could be identified. Through the simulation of 24-time periods 9-bus system and 96-time periods IEEE 118-bus system, the speed and effectiveness of proposed method were verified. Moreover, the results can help dispatch operators to locate the transmission lines with the highest congestion risk. © 2014 Chin. Soc. for Elec. Eng.

关键词： Scheduling

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Preface

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COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 2015年第5期34卷

作者： Oszkár Bíró David A. Lowther Piergiorgio Alotto Institute for Fundamentals and Theory in Electrical Engineering Graz University of Technology Graz Austria and Christian Doppler Laboratory for Multiphysical Simulation Analysis and Design of Electrical Machines Graz University of Technology Graz Austria Department of Electrical and Computer Engineering， McGill University，Montreal， Canada Dipartimento di Ingegneria Industriale Università di Padova Padova Italy

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