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Proceedings The Twenty-Ninth Southeastern Symposium on System Theory

9-11 March 1997

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  • Proceedings The Twenty-Ninth Southeastern Symposium on System Theory

    Publication Year: 1997
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    Freely Available from IEEE
  • Mathematical system theory and digital control

    Publication Year: 1997, Page(s):7 - 11
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (465 KB)

    This paper is dedicated to the formal definition of a dynamical system controlled by a digital device. Starting from general considerations, we introduce the "natural" state space and turn then to its simplification using mathematical arguments. Finally we relate this state space to the common real space and show how the digital system theory proposed here encompasses the usual control theory. View full abstract»

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  • The automatic design method of relay systems and cubicle structure and their CAD realization

    Publication Year: 1997, Page(s):379 - 383
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (477 KB)

    This paper consists of two parts. The first part discusses the general method used in automatically generating the prime drawings of relay systems and CAD realizations. A database of the basic units of the relay system was created. An expert system was integrated with topological graph search method in order to create the general drawings of the relay system. According to the customer's requiremen... View full abstract»

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  • Author index

    Publication Year: 1997, Page(s):553 - 554
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    Freely Available from IEEE
  • A transient analysis of heat transfer in double stack cold plates

    Publication Year: 1997, Page(s):348 - 352
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    There is practical interest in the mathematical characterization of the transient performance of heat dissipating extended surfaces to problems in electronic packaging. Although there has been a significant amount of work concentrating on predicting transient behavior in basic monolithic fin structures and shapes, none of these investigations is capable of handling complicated fill structures such... View full abstract»

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  • Equalization of very high speed wire data channels

    Publication Year: 1997, Page(s):281 - 285
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Continuous-time adaptive signal processing has proved extremely effective in combating problems faced in wide bandwidth applications. This paper deals with the development of a continuous-time equalization scheme that would facilitate higher data transfer rates (in the range of 500 Mb/s to 4 Gb/s) in computer data channels while keeping the bit error rates low, i.e. in the region of 10... View full abstract»

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  • Asynchronous track fusion revisited

    Publication Year: 1997, Page(s):118 - 122
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    Recently the authors derived an asynchronous track fusion algorithm that combines tracks provided by different sensors with different sampling rates and communication delays (A.T. Alouani and T.R. Rice, 1996). In that algorithm, its dynamics propagates between updates, then it uses the tracks provided by the local processors (LPs) to update its track. The paper deals with the same problem except t... View full abstract»

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  • Sliding mode control of reusable launch vehicle in launch and re-entry modes

    Publication Year: 1997, Page(s):533 - 539
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    Trajectory control for a reusable launch vehicle (RLV) is considered for two operational modes: reentry and launch modes are considered. Decentralized sliding mode controllers are designed to achieve the de-coupled asymptotic tracking of Euler angles' profiles upon plant uncertainties and external disturbances. Two sliding mode control strategies are investigated: direct Euler angles' profiles tra... View full abstract»

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  • Target tracking with explicit control of filter lag

    Publication Year: 1997, Page(s):81 - 85
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    Presents a method of gain adjustment for an alpha-beta filter when data points are lost or when the tracking interval changes. The steady-state position and velocity lags are first derived for a step acceleration input. The standard predictor-corrector forms of the filter equations are algebraically rearranged into two uncoupled difference equations; one equation for the smoothed position and one ... View full abstract»

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  • Reduction of sidelobes in the responses of optimal filters implemented on some SLMs

    Publication Year: 1997, Page(s):277 - 280
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    Spatial light modulators (SLMs) are used to implement optical correlation filters for real time pattern recognition. These SLMs have characteristics that are of limited range in the complex plane. Methods have been proposed to design optimal filters implementable on these constrained SLMs. In an earlier work it was observed and reported that the response of these optimal filters for some constrain... View full abstract»

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  • Simplex control of AC/DC converters for power factor correction

    Publication Year: 1997, Page(s):244 - 248
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    This paper proposes a new technique for controlling AC/DC converters to achieve power factor correction. In essence, this technique is the minimal form of the space-vector control approach. A 6-switch AC/DC PWM converter is used as an example View full abstract»

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  • Evolutionary fuzzy speed regulation for a DC motor

    Publication Year: 1997, Page(s):292 - 296
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    Fuzzy logic is a powerful tool in control of systems with ill-defined, inaccurate or unknown mathematical models. In classical applications of fuzzy logic, however, there is a great dependency on proper expert knowledge acquisition. The authors remove that dependency by using a genetic algorithm (GA) to automatically determine parameters of fuzzy rule sets such as membership functions. This approa... View full abstract»

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  • Cryogenic fluid flow modeling at NASA's Stennis Space Center

    Publication Year: 1997, Page(s):343 - 347
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Computational models for dynamic fluid flow simulation are needed to predict pressures, temperatures, flowrates, and other quantities in present and future testing at the Component Test Facility (CTF) at NASA's Stennis Space Center (SSC). The Rocket Engine Transient Simulation (ROCETS) package, and Boeing Computer Services' EASY5x are the two major components of the EASY/ROCETS dynamic fluid flow ... View full abstract»

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  • Mixed filtering and intelligent control for target tracking with mobile sensors

    Publication Year: 1997, Page(s):114 - 117
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    We address the problem of tracking a moving target with a mobile camera. We discuss the whole perception-decision-action process, including the image processing and the control loop. Then we turn to the theoretical proof of the stability of our control law in closed loop with the image processing View full abstract»

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  • Three-dimensional analytical and numerical solutions for acousto-optic interaction

    Publication Year: 1997, Page(s):488 - 492
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The authors present an analytical solution to the strong acousto-optic interaction problem in three dimensions. They then compare the analytical results to a split-step numerical algorithm. The algorithm is based on the concept of Fourier optics. Analytical and numerical results are presented View full abstract»

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  • The computation of steady-state distribution of parallel systems with two servers

    Publication Year: 1997, Page(s):256 - 260
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    This paper considers a queuing system that may be applied to specific networking systems and calculates the steady-state probabilities of the number of electronic signals waiting in this parallel queuing system to be transmitted. There are two identical servers, each has its own queue. Upon the arrival time, the new arrival goes into the shortest queue, and stays in that queue until it is served, ... View full abstract»

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  • Voltage-mode filters using CFAs insensitive to their nonideal parameters

    Publication Year: 1997, Page(s):159 - 163
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    New voltage-mode filter configurations using commercially available CFAs are investigated. The new configuration using two CFAs with positive feedback has very low sensitivities to the internal parameters of the CFAs, specifically, in the high frequency range. The theoretical analysis is verified using PSPICE simulations of the filter designs using the models for AD844 provided by Analog Devices I... View full abstract»

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  • A knowledge abstraction approach for multimedia presentation

    Publication Year: 1997, Page(s):528 - 532
    Cited by:  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    The demonstration of multimedia presentation can be promoted by using multi-vendor's tools. The more tools are used, the more complicated communication is needed among these tools. The integration of these multimedia presentation tools is thus important. This paper describes an architecture named tool integration platform (TIP) to integrate tools in a knowledge abstraction way. TIP is composed of ... View full abstract»

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  • Aeolotropic filter design and measurement gating for remote tracking with gridlock error

    Publication Year: 1997, Page(s):75 - 80
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Analyzes the effect of gridlock (i.e. alignment) errors on a target track filtering algorithm used for tracking with radar measurements from a remote platform. The case considered is that in which two ships are located in a 2D Cartesian coordinate system, and radar measurements from one (remote) platform are used by another (local) platform to estimate the target position and velocity in the local... View full abstract»

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  • Development of a fuzzy expert system for power quality applications

    Publication Year: 1997, Page(s):239 - 243
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Power quality issues have become more important due to the proliferation of microcomputer-based systems that are sensitive to power disturbances. The loads in customer premises have also been the source of power quality problems. It has become important for the utilities to understand the causes for power quality problems and find ways to avoid them. The fuzzy expert system is an effort to underst... View full abstract»

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  • On a load balancing algorithm based on edge coloring

    Publication Year: 1997, Page(s):174 - 178
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    Load balancing is the process of enhancing the performance of a distributed system through a redistribution of loads among the processors. In our earlier work a load balancing algorithm based on graph coloring for link-oriented structures was proposed and studied in detail. In this paper we modify the algorithm by introducing an important factor known as the damping factor, D. This factor is used ... View full abstract»

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  • Air intake theoretical model and simulation of a turbocharger diesel engine

    Publication Year: 1997, Page(s):332 - 337
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    This paper presents a theoretical model for the air intake process of a turbocharger diesel engine. Global models taking into account thermodynamics of the different steps of the diesel cycle have been proposed in the literature. This is an attempt to describe the dynamics of the air into the manifold and the intake phase by physical equations. The study shows the role of the turbocompressor on th... View full abstract»

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  • A fast learning algorithm for adaptive linear combiner

    Publication Year: 1997, Page(s):399 - 403
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    The paper suggests a learning algorithm for adaptive systems and perceptrons different from traditional learning algorithms The weight updating is kept with “instant” input and output signals. The convergence property is discussed. Also, several examples including system identification are given to show its high convergence speed compared with the LMS algorithm View full abstract»

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  • Reactive power compensation on distribution feeders

    Publication Year: 1997, Page(s):366 - 371
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    The optimal sizing and placement of shunt capacitors on distribution feeders has received considerable attention from researchers for many years. This paper provides an analysis of several of the general solution methods found in such literature. The validity of certain simplifying assumptions are addressed and additional insights are provided View full abstract»

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  • On the design of simplex control for plants with bounded disturbances

    Publication Year: 1997, Page(s):108 - 111
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    Up till now, the selection of the magnitude and direction of the control vectors in a simplex type sliding mode control system has been based on trial and error. Typically, the control vector directions would be arbitrarily picked first and then the control vector magnitudes would be iteratively adjusted, based on simulations, to be as large as needed to demonstrate reaching of the desired sliding... View full abstract»

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