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作者： Ogata, Shinpei Matsuura, Saeko Function Control System Graduate School of Engineering Shibaura Institute of Technology 307 Fukasaku Minuma-ku Saitama-City Saitama 337-8570 Japan Department of Electronic Information Systems College of System Engineering and Science Shibaura Institute of Technology 307 Fukasaku Minuma-ku Saitama-City Saitama 337-8570 Japan

ISBN: (纸本)9789604741274

It has been widely acknowledged that a major reason for software project failure is the ambiguous and incomplete customer's requirements. One of their main cautions is the inconsistency between implementation image and specification at an early stage of software development. Therefore, we have been proposed a method to automatically generate a user interface prototype from a requirements analysis model in Unified Modeling Language in order to decrease inconsistency between them for business Web application development. In this paper, we have compared our proposal with traditional use case modeling to evaluate the effectiveness of our proposal.

关键词： Unified Modeling Language

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A region entropy based objective evaluation method for image segmentation

A region entropy based objective evaluation method for image...

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IEEE Instrumentation and Measurement Technology Conference

作者： Jiasheng Hao Yi Shen Hongbing Xu Jianxiao Zou School of Automation Engineering University of Electronic Science and Technology ChengDu China Department of Control Science and Engineering Harbin Institute of Technology Harbin China

ISBN: (纸本)9781424433520

Many image segmentation methods have been proposed over the last few decades. However, the results of segmentation are usually evaluated only visually, qualitatively, or indirectly by the effectiveness of the segmentation on the subsequent processing steps. Such methods are either subjective or tied to particular applications. A few quantitative evaluation methods have been proposed, but these early methods have been based entirely on empirical analysis and have no theoretical grounding. In this paper, we put forward the concept of segmentation entropy, based on which a novel objective segmentation evaluation method is proposed. This method uses region entropy as the basis for measuring the uniformity of pixel characteristics within segmented regions and segmented entropy as a whole measure to provide a relative qualitative score that can be used to compare both various parameterizations of one particular segmentation method as well as fundamentally different segmentation techniques.

关键词： Image segmentation Random variables Information theory Particle measurements Information entropy Instrumentation and measurement automation Automatic control Grounding Measurement standards

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Robust fuzzy fault detection for non-linear stochastic dynamic systems

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Open automation and control systems Journal 2009年第1期2卷 45-53页

作者： El-Ghatwary, Magdy G. Ding, Steven X. Industrial Electronic and Automatic Control Department Faculty of Electrical Engineering Menoufia University Menouf 32952 Menofia Egypt Institute for Automatic Control and Complex System University of Duisburg-Essen Germany

One of the difficults for fault detection techniques for non-linear stochastic systems via model-based methods is the design of residual generation. In this paper, a new fault detection (FD) approche for non-linear stochastic systems is proposed. The non-linear system is represented by a discrite Takagi-Sugeno (TS) fuzzy model. The use of (TS) theory allows to represent non-linear systems as a set of linear systems, which represent the local system behavior around different operating points. The global system behaviour is described by a fuzzy fusion of all systems. The FD system for each local sub system is designed by solving the corresponding Discrite Algebra Recati Equation (DARE). Optimization algorithm based on minimizing the residual covariance matrix is used to obtain a robust FD for global system behavior. The observer gain matrices are solved using a set of Linear matrix Inequalities (LMIs). © El-ghatwary and Ding;Licensee Bentham Open.

关键词： Fault detection

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Hilbert-Huang Transform and its application in ultrasonic transducer analysis

Hilbert-Huang Transform and its application in ultrasonic tr...

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IEEE Youth Conference on Information, Computing and Telecommunication, YC-ICT

作者： Qing He Guoqi Li College of Electronic Information and Automation Tianjin University of Science and Technology TUST Tianjin China Department of System Engineering of Engineering Technology Beihang University Beijing China

A method to analyze the properties of ultrasonic transducer is proposed. The method is based on Hilbert-Huang Transform. The signals derived from ultrasonic transducer will be decomposed by empirical mode decomposition, and then the intrinsic mode functions can be obtained. So the marginal spectrum of each intrinsic mode functions will be calculated. The marginal spectrum offers a measure of total amplitude (or energy) contribution from each frequency value. Using those marginal spectrums and intrinsic mode functions, the amplitude and frequency properties of ultrasonic transducer can be analyzed. The proposed method was applied to analyze the properties of two ultrasonic transducers in experiment, and the results show that it is effective.

关键词： Ultrasonic transducers Frequency Biomedical transducers Acoustic transducers Signal analysis Signal processing Information analysis systems engineering and theory automation Energy measurement

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A nonlinear plant control by means of simulator-based foresight control

A nonlinear plant control by means of simulator-based foresi...

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SICE Annual Conference

作者： Tao Zhang Motomiki Uchida Masatoshi Nakamura Department of Automation Tsinghua University Beijing China Fukuoka Institute of Technology Fukuoka Japan Department of Advanced System Control Engineering Saga University Saga Japan

This paper proposes a simulator-based foresight control approach for nonlinear plant based on system identification. In the proposed method, as a main part of the simulator-based foresight control system, a simulator of an exact plant model of non-affine nonlinear plant is first constructed. If relative degree of disturbance is smaller than control input, servo type filter will be then installed in series of disturbance line in order to adjust relative degree. Next, a control target equation which defines pole assignment for stable output error convergence is determined. Based on this control target equation, the control input for non-affine type nonlinear plant is generated. In this paper, the control of a boiler was implemented by use of the proposed method. The simulation results verified the effectiveness of the proposed method.

关键词： Nonlinear control systems Nonlinear equations system identification Servomechanisms Filters control systems Automatic control control system synthesis Error correction Convergence

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A comparative study of two high performance current control techniques for three-phase shunt active power filters

A comparative study of two high performance current control ...

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International Conference on Power electronics and Drive systems (PEDS)

作者： Wanchak Lenwari Milijana Odavic Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Department of Electrical and Electronic Engineering University of Nottingham Nottingham UK

In recent years, the increase of non-linear loads in electrical power system has sparked the research in power quality issue. The shunt active power filter (SAPF) is a power electronic device which has been developed to improve power quality. The current control of shunt power filters is critical since poor control can reinforce existing harmonic problems. Various control strategies have been proposed by many researchers. In this paper, a comparative evaluation of the performance of two current control techniques, resonant and predictive controller, is presented with identical system specification. The design procedure and principle of both current control methods are also presented in detail. Simulation results show the comparison of transient response, steady state control and performance in the presence of variation of supply impedance between two control techniques.

关键词： Current control Active filters Electric current control Power system harmonics Power harmonic filters Power quality Power electronics Power filters Resonance control systems

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An emulation of autonomous parallel parking system using fuzzy logic control

An emulation of autonomous parallel parking system using fuz...

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SICE Annual Conference

作者： Benjamas Panomruttanarug Sarayut Tungporntawee Parnupong Thongsuk Kohji Higuchi Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Department of Electronic Engineering University of Electro-Communications Tokyo Japan

This paper represents an emulation of fuzzy logic control schemes in autonomous parallel parking system in a backward maneuver. There are four infrared sensors sending distance data to microcontroller for generating an obstacle-free parking path. Two of them mounted on the front and rare wheels on the parking side are used as the inputs to the fuzzy rules to calculate a proper steering angle while backing. The other two attached to the front and rear ends serve for avoiding collision with other cars along the parking space. At the end of parking process, the vehicle will be in line with other parked cars and position in the middle of the free space. A construction of fuzzy rules is designed based upon a wall following process. The effectiveness of the controller design is demonstrated in the experimental results.

关键词： Emulation Fuzzy logic control systems Space vehicles Infrared sensors Wheels Path planning Microcontrollers Technological innovation Safety

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Prototype multimedia database system for registration of emergency situations

Prototype multimedia database system for registration of eme...

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Signal Processing Algorithms, Architectures, Arrangements and Applications (SPA)

作者： Julian Balcerek Szymon Drgas Adam Dąbrowski Adam Konieczka Department of Computing Science and Management Chair of Control and System Engineering Division of Signal Processing and Electronic Systems Poznan University of Technology Poznan Poland

In this paper a prototype emergency services system is presented, equipped with a multimedia database registering and storing relevant emergency situations in a semi automatic way. In this paper we assume that this database is created exclusively with sound and linguistic material won from emergency telephone calls. The presented system enables conducting speaker recognition experiments. Sources of data, metadata generation, architecture description, searching for results, and database implementation are comprised.

关键词： Manuals World Wide Web Phase locked loops Web pages Graphical user interfaces Encyclopedias

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Nonlinear Observer Design for Discrete MIMO systems with Unknown Time Delay

Nonlinear Observer Design for Discrete MIMO Systems with Unk...

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Jing Na Guido Herrmann Xuemei Ren Phil Barber Education Ministry Key Laboratory of Complex System Intelligent Control and Decision School of Automation Beijing Institute of Technology IEEE Department of Mechanical Engineering University of Bristol

This paper proposes an adaptive observer for discrete MIMO systems with unknown dynamics and *** case that the system output equation has time-delay and nonlinearities is also *** delayed states in the system are with a nonlinear form and only the estimated delay is *** using a high-order neural network(HONN),the precise system model,and the Lipschitz or norm-boundedness assumption of unknown nonlinearities are not required.A novel converse Lyapunov Lemma is also developed to prove the uniform ultimate boundedness(UUB) of the proposed *** of the presented scheme is verified by simulation.

关键词： Lyapunov Nonlinear Observer Design for Discrete MIMO systems with Unknown Time Delay Observer

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Trapped magnetic field measurements on HTS bulk by peak controlled pulsed field magnetization

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Journal of Physics: Conference Series 2010年第3期234卷

作者： Tetsuya Ida Masahiro Watasaki Yosuke Kimura Motohiro Miki Mitsuru Izumi Department of Electronic Control Engineering Hiroshima National College of Maritime Technology 4272-1 Higashino Ohsakikamijima-cho Toyota-gun Hiroshima 725-0231 Japan Kawasaki Heavy Industries Ltd. Technical Institute System Technology Development Centre 1-1 Kawasaki-cho Akashi-shi Hyogo 673-8666 Japan Department of Marine Electronics and Mechanical Engineering Tokyo University of Marine Science and Technology 2-1-6 Etchu-jima Koto-ku Tokyo 135-8533 Japan

For the past several years, we have studied the high-temperature superconducting (HTS) synchronous motor assembled with melt-textured Gd-Ba-Cu-O bulk magnets. If the single pulse field magnetizes a bulk effectively, size of electrical motor will become small for the strong magnetic field of the HTS magnets without reducing output power of motor. In the previous study, we showed that the HTS bulk was magnetized to excellent cone-shape magnetic field distribution by using the waveform control pulse magnetization (WCPM) method. The WCPM technique made possible the active control of the waveform on which magnetic flux motion depended. We generated the pulse waveform with controlled risetime for HTS bulk magnetization to suppress the magnetic flux motion which decreases magnetization efficiency. The pulsed maximum magnetic flux density with slow risetime is not beyond the maximum magnetic flux density which is trapped by the static field magnetization. But, as for applying the pulse which has fast risetime, the magnetic flux which exceed greatly the threshold penetrates the bulk and causes the disorder of the trapped magnetic distribution. This fact suggests the possibility that the threshold at pulsed magnetization influences the dynamic magnetic flux motion. In this study, Gd-Ba-Cu-O bulk is magnetized by the controlled arbitrary trapezoidal shape pulse, of which the maximum magnetic flux density is controlled not to exceed the threshold. We will present the trapped magnetic characteristics and the technique to generate the controlled pulsed field.

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