Proceedings of Thirtieth Southeastern Symposium on System Theory

10-10 March 1998

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  • Proceedings of Thirtieth Southeastern Symposium on System Theory

    Publication Year: 1998
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    Freely Available from IEEE
  • Development of ATP tutorial using Java

    Publication Year: 1998, Page(s):20 - 24
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (498 KB)

    A tutorial for an engineering application such as the power software ATP (Alternative Transients Program) is presented to demonstrate the power of the Internet and Java. The difficulties in creating an input data file for ATP are explained and clarified through Java's programming capabilities. This helps the user to build the input data file for ATP effectively and quickly. The tutorial developed ... View full abstract»

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  • A new algorithm for counting and checking satisfiability and a restricted unfavorable region for polynomial average time

    Publication Year: 1998, Page(s):246 - 250
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (505 KB)

    The satisfiability (SAT) problem plays an important role in areas like AI, VLSI, OR and graph theory. The author (1989) introduced a complementary approach other than backtracking for this problem. The algorithm called IS counts the number of solutions of an instance of SAT and then answers to the testing of satisfiability. The method of counting is inspired by the Karnaugh method for simplificati... View full abstract»

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  • A knowledge-based approach for Arabic amphatic consonant identification based on speech spectrogram reading

    Publication Year: 1998, Page(s):325 - 328
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (322 KB)

    The spectrogram displays the energy distribution in the signal as a function of both time and frequency. High performance phonetic labeling of spectrogram can be obtained without the use of higher level knowledge sources. This paper reports on an attempt to acquire a phonetic knowledge base about Arabic amphatic consonants in order to build an automatic speech recognition system for modern Arabic ... View full abstract»

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  • Authors index

    Publication Year: 1998, Page(s):555 - 556
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    Freely Available from IEEE
  • Statistical characterization of a composite-feature directed deconvolver

    Publication Year: 1998, Page(s):156 - 159
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    The purpose of the composite-feature directed deconvolver is recovery of information from an additive combination of an intermittent signal-of-interest (SOI) and a stationary background signal-not-of-interest (SNOI). This device exploits specific a priori knowledge of the properties that characterize narrow-band, frequency-agile communications signals. This study is intented to establish performan... View full abstract»

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  • Development of a physically based axial compressor model

    Publication Year: 1998, Page(s):120 - 124
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Aero-engines operate in regimes limited by both rotating stall and surge. The design of controllers allowing to operate close to compressor stability limit and capable of preventing rotating stalls and surge. The Moore-Greitzer cubic model (MG3) [1984, 1986] provides a simplified description of open-loop behavior of an axial compressor. The simple description of the pressure rise in the compressor... View full abstract»

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  • Application of linear subspace stabilization and linear adaptive techniques to aircraft flight control problems. II. The outer loop

    Publication Year: 1998, Page(s):151 - 155
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    For pt. I see ibid., p.146-50. Robust flight control laws are developed for a combat aircraft. The control problem is layered into an outer-loop of control, or automatic pilot, controlling motion of the center of gravity of the aircraft and an inner-loop of control that controls the angular motion around the center of gravity. This paper is concerned with application of linear adaptive design tech... View full abstract»

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  • Estimating the parameters of exponentially damped sinusoids in light and flexible structures using the SINTRACK method

    Publication Year: 1998, Page(s):115 - 119
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The low computation cost, short delay and accuracy of SINTRACK, makes it a very interesting real-time signal processing tool for detection and estimation of damped sinusoids in noise. A noise analysis, as well as a parameters' optimal adjustment analysis are provided. SINTRACK is successfully applied for detection and estimation of a HALE wing bending and torsion oscillations, validating a theoret... View full abstract»

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  • ATM networks for telecommunication systems

    Publication Year: 1998, Page(s):429 - 433
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    At present the local telephone network uses twisted copper wire pairs with the ISDN protocol, TV communication uses analogical or numerical video signals and computers use IP on Internet/Intranet networks. Thus each network uses his own protocol. All these different networks can be integrated in only one network with better quality of service. The author looks at how ATM networks are the basis for... View full abstract»

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  • Application of linear subspace stabilization and linear adaptive techniques to aircraft flight control problems. I. The inner loop

    Publication Year: 1998, Page(s):146 - 150
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    Robust flight control laws are developed for a combat aircraft. The control problem is layered into an outer-loop of control, or automatic pilot, controlling motion of the center of gravity of the aircraft and an inner-loop of control that controls the angular motion around the center of gravity. This paper is concerned with application of subspace stabilization theory to accommodate the nonlinear... View full abstract»

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  • Scattered near field characteristics due to the physical features of a simplified missile structure

    Publication Year: 1998, Page(s):107 - 111
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    In order to develop a basic understanding of the interaction of an ultra-wideband transient electromagnetic plane wave with a conducting cylindrical body such as a missile, the near field effects due to the basic physical features of the scatterer must be studied. A simplified missile structure with no appendages such as fins or antennas is considered. The simplified missile structure consists of ... View full abstract»

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  • Applying flow analysis methods to the problem of network design

    Publication Year: 1998, Page(s):424 - 428
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    One of the reasons that the communication network design problem is so difficult is that there are numerous competing objectives. The following criteria must be met in an optimum design: minimize the cost of the resulting network; maximize flow between all pairs of nodes; allow multiple commodities to simultaneously use the network; synthesize an optimum topology for the network; and provide an ef... View full abstract»

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  • Controller gain bounding in the minimal control synthesis algorithm

    Publication Year: 1998, Page(s):141 - 145
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The minimal controller synthesis (MCS) algorithm is an extension of the class of model reference adaptive control (MRAC) algorithms that requires neither plant model identification nor linear controller synthesis. Various theoretical and experimental studies have shown it to possess the stability and robustness features essential to any successful adaptive control scheme. However, due to its high ... View full abstract»

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  • The numerical solution of elliptic problems using compactly supported wavelets

    Publication Year: 1998, Page(s):102 - 106
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The use of wavelet and wavelet-like basis functions in the finite element analysis of one dimensional problems in which Neumann boundary conditions are specified at both boundaries is presented. Construction of both the wavelet and wavelet-like basis functions is discussed. Results obtained from a finite element algorithm employing the wavelet and wavelet-like basis functions are compared to the a... View full abstract»

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  • Satellite attitude control using only magnetorquers

    Publication Year: 1998, Page(s):500 - 504
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Since magnetic control systems are relatively reliable, lightweight, and energy efficient, magnetic torque was found to be attractive for small, inexpensive satellites. Magnetorquers are often used with a gravity gradient boom to control a spacecraft's attitude. However, attempts at using only magnetorquers in all three axes have been unsuccessful, because control torque can only be generated perp... View full abstract»

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  • Nonlinear MISO modeling using genetic programming

    Publication Year: 1998, Page(s):42 - 46
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    An algebraic model for an unknown, nonlinear, MISO (multiple input, single output) system is derived from a table of the system's input and output values. Genetic programming is used to find a model that is optimal (or nearly optimal) with respect to a nonlinear performance index. In order to apply genetic programming to this task, an encoding strategy to represent the model is devised. Then, spec... View full abstract»

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  • On-line control of a real system with MATLAB/SIMULINK

    Publication Year: 1998, Page(s):7 - 9
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    An interface routine using C programming language, establishes communication between MATLAB and an I/O card. This enable the user to implement the simulated controller in MATLAB environment to control real-time plant, as well as to utilize the software as a data collection device which records plant output and reference input. With the help of the interface routine, the performance of each control... View full abstract»

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  • On stabilizing solutions to the Riccati differential equation

    Publication Year: 1998, Page(s):80 - 84
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    Sufficient conditions are presented for the existence of a stabilizing solution to a Riccati differential equation using the notion of a pole set for a time-varying state equation previously defined by the author (1997). The results presented in this paper supplement the work of Ravi et al. (1992) and generalize the methods used in the investigation of stabilizing solutions to the algebraic Riccat... View full abstract»

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  • Error analysis in a problem of approximation of a solution of perturbed signal space and its orthogonal complement

    Publication Year: 1998, Page(s):241 - 245
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    It is indicated how, in signal matrix-based processing problems, to estimate a signal subspace or its orthogonal complement when the data contain small perturbations. Singular value decompositions (SVD) are used View full abstract»

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  • Solutions of matrix equations arising in track filter theory

    Publication Year: 1998, Page(s):370 - 372
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    The general solution of the equations that arise in constant coefficient filter theory are solved for arbitrary number of dimensions. Namely, we solve the first order matrix equation for the special case of scalar measurements. We also determine the covariance matrix for the general case. We then illustrate these results for the specific case of an alpha-beta filter View full abstract»

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  • BER performance of M-QAM using OFDM with RF carrier phase noise

    Publication Year: 1998, Page(s):419 - 423
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    Orthogonal frequency division multiplexing (OFDM) requires strict attention to synchronization to maintain the orthogonality of subchannels. Pollet et al. (1995) pointed out the severe nature of a frequency offset impairment in the OFDM receiver. However, even if zero frequency error is achieved, frequency conversion for RF or microwave channels unavoidably imposes phase noise, a portion of which ... View full abstract»

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  • Comparative study by numerical simulation of induction machine performances in vector and scalar control

    Publication Year: 1998, Page(s):483 - 487
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Presents a comparative study of static and dynamic characteristics of a self-controlled induction machine (IM) by two control approaches: scalar control and vector control. This research work aims at evaluating the influence of system control upon the system performances. This leads to focus the inherent advantages and disadvantages to the use of these control methods according to the imposed load... View full abstract»

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  • Design of a distal teacher recursive estimator for airplane flight controllers

    Publication Year: 1998, Page(s):134 - 137
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Aircraft controllers in general have particular flight limitations in which the aircraft is controllable. It may be difficult, if not impossible to control an aircraft using a classical controller if the dynamics of the aircraft were to change or if the flight limitations are exceeded. This is because classical controllers for airplanes are designed according to specific dynamics of the system. Th... View full abstract»

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  • Speech recognition using pulse coupled neural network

    Publication Year: 1998, Page(s):515 - 519
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The same word uttered by different people have different waveforms, similarly the same word uttered by the same person at different time will also have some degree of variations in waveforms. In this experiment a set of ten words was selected and each word was uttered ten times by ten different speakers. The objective of this work is to extract the information conveyed in the signal, especially if... View full abstract»

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