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Proceedings of the 35th Southeastern Symposium on System Theory, 2003.

2003

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Displaying Results 1 - 25 of 104
  • On teaching state-space control system design using a MATLAB real-time experiment

    Publication Year: 2003, Page(s):317 - 321
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB) | HTML iconHTML

    Topics in state-space control theory in a senior-level undergraduate course are introduced and investigated using the MATLAB real-time environment and an experimental apparatus. The experiment serves as a continuing application in the course. Specifically, the students explore two different design approaches and explore practical design issues such as unmodeled dynamics, control input usage and no... View full abstract»

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  • Scale-model vehicle analysis for the design of a steering controller

    Publication Year: 2003, Page(s):201 - 205
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB) | HTML iconHTML

    A scale-model vehicle is developed that is dynamically similar to a full-size vehicle through application of the Buckingham-Pi theorem. Specifically, the vehicle is modified to match the corresponding Pi groups of the scale-model vehicle and the average of a number of full-size vehicles. The modifications require the mass of the vehicle and its distribution to be changed. Furthermore, an experimen... View full abstract»

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  • Proceedings of the 35th Southeastern Symposium on System Theory (Cat. No.03EX639)

    Publication Year: 2003
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (794 KB)

    The following topics are dealt with: communications; expert systems; information theory; control and power systems; discrete/continuous signals; nonlinear systems; telecommunications; undergraduate control systems education; robotics; image processing; signal processing; education; target tracking; power electronics. View full abstract»

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  • Spline-based nonlinear controller for the Duffing oscillator

    Publication Year: 2003, Page(s):191 - 195
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB) | HTML iconHTML

    The forced Dulling oscillator is a mathematical model of the nonlinear pendulum. It is formulated by a second-order, nonlinear, nonautonomous, ordinary differential equation. First, a review of designing a nonlinear controller with an exact feedback linearization method is given. Then a spline method is used to mimic the controller which drives a state of the Duffing system toward a desired path. ... View full abstract»

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  • Author's index

    Publication Year: 2003, Page(s):491 - 494
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    Freely Available from IEEE
  • Tone classification of syllable-segmented Thai speech based on multilayer perceptron

    Publication Year: 2003, Page(s):392 - 396
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (390 KB) | HTML iconHTML

    Thai is a monosyllabic, tonal language that makes use of tone to convey lexical information about the meaning of a syllable. Thai has five distinctive tones, and each tone is well represented by a single F0 contour pattern. In general, a Thai syllable with a different tone has a different lexical meaning. Thus, to completely recognize a spoken Thai syllable, a speech recognition system has to not ... View full abstract»

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  • On the theory of discrete-time signals of the discrete/continuous type

    Publication Year: 2003, Page(s):113 - 121
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (730 KB) | HTML iconHTML

    In this paper, a new type of discrete-time signal and related signal-processing technique, called discrete/continuous (D/C), is introduced and a variety of potential application-areas are described. A D/C signal can be viewed as a natural generalization of the traditional zoh-type signal format with the (new) feature that continuous, intersample time-variations of the D/C signal are allowed. In so... View full abstract»

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  • Periodic event scheduling based on controlled stochastic Petri net

    Publication Year: 2003, Page(s):386 - 391
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB) | HTML iconHTML

    Several networks of public transportation are designed according to the hub principle. Thus, the improvement of connection conditions becomes the main condition to provide an satisfactory level of quality of service. This paper is focused on the minimization of the connection time. Thus, the problem of periodic event scheduling is dealt. This problem is generally approached by mean of deterministi... View full abstract»

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  • Modeling and control of a wind turbine as a distributed resource

    Publication Year: 2003, Page(s):108 - 112
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB) | HTML iconHTML

    This paper is a part of a research project to study the dynamics and control of distributed resources (DRs) in the deregulated electric power industry. It reflects the need to look at large wind farms as power plants, as a result of the increased penetration of wind energy in the power systems many places in the world. To obtain an optimal integration of high penetration of wind energy in the syst... View full abstract»

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  • Multimedia file sharing in multimedia home or office business networks

    Publication Year: 2003, Page(s):237 - 241
    Cited by:  Papers (1)  |  Patents (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB) | HTML iconHTML

    Today, many computer users in business and industry are adopting Macintosh computers as a primary multimedia tool because of its superior video, images, and sound. Although many cross-platform file types are currently available, connection type depends mainly on network purpose, and media types are sufficiently diverse that uninformed users can encounter serious problems. This paper presents a sim... View full abstract»

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  • Thai handwriting legal amounts recognition

    Publication Year: 2003, Page(s):381 - 385
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (407 KB) | HTML iconHTML

    A legal amount, or the word amount, is defined as the expression of a numerical value into words. It is used mostly in monetary documents. Thai legal amounts consist of a set of 17 words of 25 characters. This paper's objective is to develop a system to recognize Thai handwriting legal amounts. The strategies to improve the character recognition rates at the preprocessing and recognition process a... View full abstract»

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  • Neural network based adaptive phase and amplitude equalizer for optimal and robust control of the current regulated PWM inverters

    Publication Year: 2003, Page(s):176 - 180
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (406 KB) | HTML iconHTML

    In this paper a novel neural network (NN) based adaptive control system for optimal control of current regulated PWM inverters (CRPWMI) has been proposed. The optimal tracking ability that is tracking the reference signal with minimum phase and amplitude errors is one of the well known desirable performance of the inverter systems. Conventional controllers such as proportional-integral (PI) contro... View full abstract»

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  • A new method to account for STATCOM losses in power flow analysis

    Publication Year: 2003, Page(s):477 - 481
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (362 KB) | HTML iconHTML

    Power flow analysis of power systems with STATCOM is reviewed. A new method for the power flow calculation of a power system with STATCOM operating in voltage control mode is introduced. Unlike the common practice where the real power loss of STATCOM is ignored, the proposed procedure accommodates this loss by including the equivalent resistance of the STATCOM in power flow calculation. The new me... View full abstract»

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  • Estimation of the rotor resistance in induction motor by application of the spiral vector theory associate to extended Kalman filter

    Publication Year: 2003, Page(s):211 - 216
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (326 KB) | HTML iconHTML

    For guaranteed good performances in transient and steady state in vector control of induction motor, it's necessary to conceive regulation of parameters variations, in particular rotor resistance. To solve this problem, innumerable works are devoted to rotor resistance, but they use Park's model of the induction motor for estimating this resistance. However this model use a hefty geometric transfo... View full abstract»

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  • A systems engineering approach to teaching energy

    Publication Year: 2003, Page(s):322 - 325
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (341 KB) | HTML iconHTML

    In this paper we discuss the energy systems portion of an environmental engineering sequence for nonenvironmental engineering students. Energy is approached from the prospective of a systems engineer, who is concerned with the overall design of an energy system. Through novel laboratory exercises and projects, students become familiar with the various components of energy systems such as energy so... View full abstract»

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  • H-infinity controller for solid oxide fuel cells

    Publication Year: 2003, Page(s):464 - 467
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB) | HTML iconHTML

    The objective of this paper is to regulate output fuel cell voltage for small load variations by changing input fuel flow, and to protect fuel cell stack by controlling fuel utilization parameter. Fuel cell utilization, which is dependent on both stack current and input fuel flow variation, should be kept between upper and lower limits to avoid damaging fuel cell stacks. In this paper, a linearize... View full abstract»

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  • Optimal and adaptive compensation of voltage and current harmonics of nonlinear loads under nonstiff voltage conditions

    Publication Year: 2003, Page(s):103 - 107
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (411 KB) | HTML iconHTML

    In this paper operation of OFC based active power filters under nonstiff and distorted voltage conditions is investigated. Under these conditions there exist a feedback from the load currents to the load voltages hence this situation makes the OFC based system a closed loop adaptive system which may represent an unstable or poor transient response behavior. By identifying the source equivalent cir... View full abstract»

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  • Output derivative estimation and disturbance attenuation using PI observer with application to a class of nonlinear systems

    Publication Year: 2003, Page(s):196 - 200
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (318 KB) | HTML iconHTML

    High-gain observers have been used to estimate derivatives of the output in different applications. These observers have shown great advantages in the design of nonlinear output feedback control of nonlinear systems. However, when disturbances and/or noises are present in the systems, the performance of high-gain observers is degraded. We try to overcome this deficiency by investigating the applic... View full abstract»

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  • Multistage software estimation

    Publication Year: 2003, Page(s):232 - 236
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (382 KB) | HTML iconHTML

    This paper proposes a COCOMO-based multistage software estimation approach. In the first stage, Monte-Carlo simulation is used to identify the key cost drivers in COCOMO II model, which contribute most to the variance of the software effort prediction. In the second stage, six selected cost drivers, as fuzzy inputs, are fed into three fuzzy expert systems to get the effort multiplier estimation. A... View full abstract»

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  • MIPA detection procedures and estimation

    Publication Year: 2003, Page(s):376 - 380
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB) | HTML iconHTML

    The problem of signal detection in severe and/or changing noise environment is considered. In this paper, the theory of m-interval polynomial approximation (MIPA) is modified and extended to include the operation of detecting weak stochastic signals (low SNR) by an array of sensors. The main concern is to formulate the descriptive structure of the robust array when the functional form of the under... View full abstract»

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  • Sampled-data control for minimising output product variance

    Publication Year: 2003, Page(s):417 - 421
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (435 KB) | HTML iconHTML

    The paper deals with the design of a digital (sampled-data) controller to minimize output product variance. The digital controller is designed on the basis of a feedback control algorithm. Automatic and statistical process control techniques are used to develop the control algorithm. Dead-time simulation of the control algorithm gives information of when to make an adjustment in the input variable... View full abstract»

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  • A Fourier/Hopfield neural network for identification of nonlinear periodic systems

    Publication Year: 2003, Page(s):53 - 57
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (339 KB) | HTML iconHTML

    This paper presents a method based on using a Hopfield neural network for the identification of nonlinear periodic systems. The system model is obtained by calculating the optimum coefficients of the expansion of the system over a set of Fourier basis functions. The identification process is accomplished using a "Fourier/Hopfield Neural Network". Fourier basis were chosen because they are best sui... View full abstract»

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  • Hardware acceleration of pseudo-random number generation for simulation applications

    Publication Year: 2003, Page(s):299 - 303
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB) | HTML iconHTML

    In modeling and simulation tools, random numbers from a variety of probability distribution functions are generated to simulate the behavior of random events. Inefficient generation of these numbers can be a significant bottleneck for simulation applications. Generating these random numbers imprecisely can skew results. An efficient and scalable fixed-point method for generating random numbers for... View full abstract»

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  • Automated test trajectory for hybrid systems

    Publication Year: 2003, Page(s):441 - 444
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB) | HTML iconHTML

    This paper contains the first steps toward the development of an automated test-input generation algorithm-inspired by test input generators for software systems-for human-in-the-loop embedded systems such as automotive and avionic system as well as an increasing number of smaller consumer devices. The idea is to create an algorithm whose inputs are: a model of the control system being tested, alo... View full abstract»

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  • Fault tolerant neuro-H controller design for aircraft auto-landing

    Publication Year: 2003, Page(s):172 - 175
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (334 KB) | HTML iconHTML

    A fault tolerant controller is designed for aircraft auto-landing by integrating a dynamic structured radial basis function network (RBFN) with traditional controllers. The RBFN, with the name of minimal resource allocating network (MRAN), is used in the outer loop to aid an inner conventional controller. Simulation results demonstrate satisfactory performance of the proposed MRAN neuro-flight con... View full abstract»

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