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International Conference on Telecommunications Energy (INTELEC)

作者： Joonseon Ahn Sung Chul Go Seungjoo Kim Ju Lee Hee-jun Kim Dept. of Electrical Eng. Osan University Korea Dept. of Electrical Enz. Hanyang University Korea Department of Electrical Control and Instrumentation Biomedical Engineering Hanyang University South Korea Dept. of Electrical Hanyana University Korea Dept. of Electrical Eng. and Computer Science Hanyang University Korea

ISBN: (纸本)9781424424900

In this paper, authors are proposed drive system for BLDCM using motor drivers based on LabVIEW. Most researchers generally use Matlab/Simulink program as computer simulation tool for their control system design. These control system must be coded to the motor drivers using program language such as C for its verification. We developed drive system using LabVIEW, it is able to complete whole process from control system design to verification of control system without program coding. Authors also proposed power conversion stack designed for LabVIEW controller and BLDCM drive.

关键词： Digital control

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Quasi-direct pole placement for time delay systems applied to a heat transfer set-up

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IFAC Proceedings Volumes 2009年第14期42卷 325-330页

作者： Tomáš Vyhlídal Wim Michiels Pavel Zítek Center for Applied Cybernetics Dept. of Instrumentation and Control Eng. Faculty of Mechanical Engineering Czech Technical University in Prague Technicka 4 166 07 Praha 6 Czech Republic Department of Computer Science Katholieke Universiteit Leuven Celestijnenlaan 200A B-3001 Heverlee Belgium

A method for quasi-direct pole placement is presented for a class of retarded time delay systems with a single control input. The pole placement is done in two steps. First, a number of dominant poles, smaller than the number of controller parameters, are directly assigned. This leads to constraints on the controller parameters. By using the singular value decomposition a simple parameterization of all controllers satisfying these constraints is obtained. In the second step, the remaining degrees of freedom in the parameter space are used to shift the remaining part of the system spectrum as far to the left as possible. It is done using an optimization procedure for nonsmooth, nonconvex functions. An extensive real-plant example is presented to demonstrate the application of the novel pole placement procedure.

关键词： Retarded system pole placement singular value decomposition nonsmooth optimization

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Optimization based synthesis of state derivative feedback controllers for retarded systems

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IFAC Proceedings Volumes 2009年第14期42卷 162-167页

作者： Paul McGahan Tomás Vyhlídal Wim Michiels Center for Applied Cybernetics Dept. of Instrumentation and Control Eng. Faculty of Mechanical Engineering Czech Technical University in Prague Technická 4 166 07 Praha 6 Czech Republic Department of Computer Science Katholieke Universiteit Leuven Celestijnenlaan 200A B-3001 Heverlee Belgium

The paper presents an optimization based algorithm for stabilizing retarded systems using a state derivative feedback controller. It is shown that an application of such a controller results in neutral dynamics of the closed loop system if small feedback delays occur. Therefore, the strong stability theory of neutral systems needs to be considered in the controller synthesis problem. The stabilization approach is based on minimizing the spectral abscissa of the closed loop system over the controller parameter space, subject to a strong stability constraint.

关键词： Time Delay State Derivative Feedback Strong Stability Delay Structure

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A novel load variation compensation algorithm in a sensor-less brushless DC motor drive for a reciprocating compressor

A novel load variation compensation algorithm in a sensor-le...

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International Conference on Telecommunications Energy (INTELEC)

作者： Sang-Taek Lee Hee-Jun Kim Dae-Kyong Kim Kwang-Woon Lee Dept. of Electronics Electrical Control and Instrumentation Engineering Hanyang Univ. Korea Digital Convergence Center Korea Electronics Technology Institute Korea School of Electrical Engineering and Computer Science Hanyang Univ. Korea Division of Maritime Electronics and Communication Engineering Mokpo National Maritime Univ. Korea

ISBN: (纸本)9781424424900

This paper presents a novel load variation compensation algorithm in a sensor-less BLDC motor drive for a reciprocating compressor. Periodic load variation of a reciprocating compressor leads to commutation position error and instantaneous speed variation and causes large peak currents. The major concept of this study includes tracking the pattern of load torque and controlling the motor input voltage by the commutation point and PWM depending on the tracked load torque. The suggested method can reduce the cost because this method does not require additional current sensing or voltage comparison circuit. The utility of the suggested algorithm was confirmed by simulation and experimental results of a sensor-less BLDC motor drive.

关键词： Load management Brushless DC motors Torque Commutation Pistons Voltage control Refrigeration Rotors Home appliances Force control

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Knowledge discovery based on quantum mechanism and its application

Knowledge discovery based on quantum mechanism and its appli...

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2008 International Conference on Artificial Intelligence, ICAI 2008 and 2008 International Conference on Machine Learning;Models, Technologies and Applications, MLMTA 2008

作者： Kwak, Keun-Chang Dept. of Control Instrumentation and Robot Engineering Chosun University 375 Seosuk-dong Dong-gu Gwangju 501-759 Korea Republic of

ISBN: (纸本)1601320728

this paper is concerned with a method for designing Quantum-based Adaptive Neuro-Fuzzy System with (QANFS) a TSK fuzzy type based on the fuzzy granulation. Here we develop a systematic approach to generating automatic fuzzy rules based on fuzzy subtractive quantum clustering that is an extension of ideas inherent to scale-space clustering and support-vector clustering. Moreover, we develop Linear Regression (LR)-QANFS as an incremental model to deal with localized nonlinearities of the system so that all modeling discrepancies can be compensated. After adopting the construction of the LR as the first global model, we refined it through a series of local fuzzy if-then rules in order to capture the remaining localized characteristics. The experimental results revealed that the proposed LR-QANFS showed a better performance in comparison with radial basis function networks and the linguistic model for a coagulant dosing process in a water purification plant.

关键词： Radial basis function networks

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3D object recognition based on an enhanced independent component analysis

3D object recognition based on an enhanced independent compo...

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2008 International Conference on Image Processing, Computer Vision, and Pattern Recognition, IPCV 2008

作者： Kwak, Keun-Chang Dept. of Control Instrumentation and Robot Engineering Chosun University 375 Seosuk-dong Dong-gu Gwangju 501-759 Korea Republic of

ISBN: (纸本)1601320787

We present an Enhanced Independent Component Analysis (EICA) and its application to three-dimensional (3D) object recognition. In general, Independent Component Analysis (ICA) involves unsupervised learning and high-order statistics. We develop an enhancement of the generic ICA by augmenting this method by the Linear Discriminant Analysis (LDA). The EICA is systematically developed on its underlying two architectures and cosine similarity. We demonstrate that the presented approach leads to the formation of well-separated classes in low dimension subspace and is endowed with a great deal of insensitivity to large variation in direction of 3D object images. The comprehensive experiments are completed for the COIL 3D object database with 100 classes. The experimental results reveal that EICA comes with improved classification rates when compared with some other conventional approaches such as PCA and ICA.

关键词： Independent component analysis

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Secure framework for integrated multipath MANET with internet

Secure framework for integrated multipath MANET with interne...

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2008 International Symposium on Applications and the Internet, SAINT 2008

作者： Vaidya, Binod Pyun, Jae-Young Pan, Sungbum Ko, Nak-Yong Dept. of Electronics and Computer Eng. Tribhuvan University Kathmandu Nepal Dept. of Information and Communication Eng. Chosun University Kwangju Korea Republic of Dept. of Control Instrumentation and Robot Eng. Chosun University Kwangju Korea Republic of

ISBN: (纸本)9780769532974

With the increasing demand of ubiquitous computing, the interconnection of mobile ad hoc networks (MANETs) to Internet is also getting attractive, which is so-called hybrid or connected MANET. In MANET paradigm, routing is a challenging task due to mobility and the resulting inherent dynamic network topology. In many applications, multipath routing scheme is favorable than single-path routing due to many advantages. Security issues in hybrid MANET, however, is still challenging task. There are two critical issues for providing a secure multihop route discovery: Internet connectivity and ad hoc routing. In this paper, we present architecture framework for secure hybrid multipath MANET that can provide global connectivity. We provide security analysis by using BAN Logic. © 2008 IEEE.

关键词： Mobile ad hoc networks

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Navigation of mobile robots using 6DOF SLAM accelerated by leveled maps

Navigation of mobile robots using 6DOF SLAM accelerated by l...

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2007 Int. Conf. on Telecommunications and Networking, TeNe 2007, 2007 Int. Conf. on Industrial Electronics, Technology and Automation, IETA 2007, Part of the Int. Jt. Conf. on Computer, Information, and Systems Sciences, and engineering, CISSE 2007

作者： Jez, Ondrej Dept. of Control and Instrumentation Faculty of Electrical Engineering and Communication Brno University of Technology Kolejni 2906/4 Brno 612 00 Czech Republic

ISBN: (纸本)9781402087363

This article is presenting a method for simultaneous localization an mapping (SLAM) of mobile robots in unknown environments. The method is using 3D range data which are acquired from a continuously inclined laser time of flight ranging sensor. In order to accelerate existing computational time-demanding Iterative Closest Point SLAM methods, the SLAM procedure is using a leveled map of the environment created from the 3D data which serves as a pre-estimation of the optimal translation and rotation in three degrees of freedom. This can eliminate the number of iterations of the final robust six degrees of freedom (6DOF) ICP registration, thus saving a lot of computational time. The criteria of the success of this method are the characteristics of the environment, especially the way the environment is structured, and the appropriate setting of the leveled map extraction. Results from the testing of the method in indoor environment are also presented. © Springer Science+Business Media B.V. 2008.

关键词： Mobile robots

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Precise measurement of wireless network roaming functionality and network component parameters applied for automation systems

Precise measurement of wireless network roaming functionalit...

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3rd International Conference on Systems, ICONS 2008

作者： Kadlec, Jaroslav Beran, Jan Vrba, Radimír Dept. of Microelectronics Brno University of Technology Faculty of Electrical Engineering and Communication Technologies Brno Czech Republic Dept. of Control and Instrumentation Brno University of Technology Faculty of Electrical Engineering and Communication Technologies Brno Czech Republic

ISBN: (纸本)9780769531052

The contemporary wireless networks in use have to solve problems with moving wirelessly connected devices. Such devices can move inside a one wireless network cell or across the several ones in the frame of one network or even from the one network to another. The conventional wireless connection types were designed for providing basic roaming functionality. The same functionality can be used in automation wireless networks. Main problems of roaming in automation networks especially in time-critical applications are speed of roaming procedure, and security of roaming procedure. Automation systems are very sensitive to packet losses and time delays in the communication. Securing of communication link during roaming is also required. Roaming speed goes directly against security level and it's very important to specify requirements of possible automation applications to maximum time delay and minimum security level. Roaming process and time consumption of its particular procedures is in detail described and measured in this paper. Based on required parameters to maximum roaming delay time and security level should be selected optimal compromise between these two parameters. The chapter below is focused on the roaming functionality available in WLANs, their main features, basic principles and concrete testing of these important parameters. © 2008 IEEE.

关键词： Wireless networks

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Local positioning system for human tracking

Local positioning system for human tracking

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2nd International Convention on Rehabilitation engineering and Assistive Technology, i-CREATe 2008

作者： Paluecha, Nakarin Tangamchit, Poj Dept. of Control Systems and Instrumentation Engineering King Mongkut's University of Technology Thonburi 126 Prachautit Rd. Bangmod Tungkru Bangkok 10140 Thailand

ISBN: (纸本)9789810803681

We propose a local positioning system that tracks human's movement. The system uses two 3-axis accelerometers mounted at the human's feet to detect steps. An electronic compass is used to obtain an absolute heading. Both step and heading data are combined to plot a movement trajectory on a building floor map based on the dead reckoning method. The system is tested by tracking a closed-loop walking trajectory: starting from a room, walking to another room about 20 meters away, and walk back to the starting point in the first room. The result shows about 2 meters accumulated error from the starting point.

关键词： Indoor positioning systems

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