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24-26 April 1998

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Displaying Results 1 - 25 of 109
  • Proceedings IEEE Southeastcon '98 'Engineering for a New Era'

    Publication Year: 1998
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    Freely Available from IEEE
  • Finite element analysis and active vibration control of a cantilever beam

    Publication Year: 1998, Page(s):37 - 38
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (94 KB)

    Summary form only given. Finite element modeling of a cantilever beam and active vibration control are implemented within the MATLAB environment. Using classical root locus design techniques, a lead-lag compensator is designed to stabilize the beam and to eliminate the effect of a step disturbance. This utilization of the finite element method and control system theory in a common software environ... View full abstract»

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  • Temporal near fields of a missile structure under plane wave illumination

    Publication Year: 1998, Page(s):126 - 127
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (81 KB)

    Summary form only given. Discusses the interaction of a transient EM field with a conducting cylindrical body. The physical features of the body-of-revolution (BOR) model and the characteristics of the incident wave are of prime importance with regard to the means of interaction. The conducting BOR studied is a simplified missile structure consisting of a straight cylinder which is closed with an ... View full abstract»

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  • Two-part solution of Laplace's equation: an adaptive fuzzy system front-end with a Markov chain back-end

    Publication Year: 1998, Page(s):281 - 282
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (81 KB)

    Summary form only given. This paper illustrates the combination of a fuzzy inference system with a Monte Carlo method to solve Laplace's equation. Fuzzy inference systems are found to be widely used in the area of control systems. As a general remark, fuzzy system applications can occur where expert knowledge can be translated into a cognitive set of rules. This tool along with a Monte Carlo metho... View full abstract»

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  • Tutorial abstracts

    Publication Year: 1998, Page(s):413 - 414
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (159 KB)

    First Page of the Article
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  • Index of authors

    Publication Year: 1998, Page(s):415 - 416
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    Freely Available from IEEE
  • Analysis of series compensation from different aspects

    Publication Year: 1998, Page(s):100 - 104
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    This paper introduces methods to find the location and size of series capacitor. The methods use reactive power loss sensitivity index (RPLSI) to find the location of series capacitor, and calculate the degree of series compensation to maximize the power flow. It is also shown that series compensation can be represented in Zbus by adding a new parallel line. Finally the line flows of th... View full abstract»

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  • Optimal distribution of loads accounting the losses in electrical power systems

    Publication Year: 1998, Page(s):96 - 99
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    The problem of regime optimisation in an electrical power system with known equipment composition is formulated as a nonlinear mathematical programming problem. As an economic criteria of the solution the minimum of total fuel expense is approved. The technical constraints are presented like linear inequalities. The power losses in the electric network are counted off with approximate formulas. As... View full abstract»

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  • Effect of high magnetic field on transistor characteristics with applications to SEU testing

    Publication Year: 1998, Page(s):338 - 339
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    Transistor characteristics are modified by the application of high magnetic fields. These changes are due to Hall effect voltages or magnetoresistance. Translations of device characteristics can be modeled by connecting voltage or current sources in series/parallel with the device. These translations are similar to the effect of ionizing radiation creating a plasma column in the device. This resul... View full abstract»

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  • Optimal location of series capacitor for voltage instability problems

    Publication Year: 1998, Page(s):91 - 95
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    This paper introduces a method to find the location and the size of series capacitors to maximize the diagonal terms of the Jacobian submatrix. The obtained results are based on a newly defined d(∂Q i/∂Vi)/dKs criterion for voltage stability. The continuation method is used to update the bus voltage magnitudes and angles using the developed dV/dK... View full abstract»

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  • A convenient vehicular automation system in promoting bus services

    Publication Year: 1998, Page(s):153 - 157
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    We introduce a vehicular automation system to promote a bus service. The system provides two kinds of services to passengers. One is a voice announcing service. The other is an LED matrix display service. The voice announcing service reminds the passengers of the newly approaching station. The LED matrix not only displays the name of the station but also displays the driving status of the bus so t... View full abstract»

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  • Relative calibration of scatterometer antennas using land targets

    Publication Year: 1998, Page(s):334 - 337
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    In this paper a simple method for relative antenna calibration is applied to NSCAT (NASA Scatterometer), and the model used is described. Calibration data sets are extracted using high-resolution masks. Results are presented for the Amazon rain forest (traditionally used) and the Siberian plain. Beam correction tables are derived for balancing normalized radar backscatter coefficient measurements ... View full abstract»

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  • An enhanced detection of the evoked potential signal using a hybrid QMF algorithm

    Publication Year: 1998, Page(s):24 - 27
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    The authors introduce an efficient technique to detect the evoked potential, EP, transients. A hybrid algorithm using Daubechies (1990, 1994) as the father and Coiflet as the mother wavelet is employed on both a single and four-averaged EP sweeps. A 60% reduction in the number of sweeps with a high quality performance has been achieved when compared to traditional techniques View full abstract»

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  • A Matlab educational software tool for teaching complex analysis in engineering

    Publication Year: 1998, Page(s):204 - 207
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    This paper describes some features of an interactive educational tool developed for teaching complex analysis for engineering students. It focuses on the graphic representation of the operations of complex arithmetic and the images of complex domains under analytic function. Emphasizing the visualization of such topics, it is intended for use in a graduate engineering analysis course to provide st... View full abstract»

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  • Optimizing a coplanar waveguide-fed aperture coupled patch antenna for ease of manufacturing and elimination of back radiation problems

    Publication Year: 1998, Page(s):87 - 90
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    A compact CPW-fed aperture coupled patch antenna is modeled using the moment method code, IE3D. It is shown that improvements can be made be optimizing various parameters of the antenna, such as patch diameter, CPW slot width, etc. The improvements are an increase in the bandwidth of the antenna, in the return loss across the band, as well as in the design which yield a more practical antenna in t... View full abstract»

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  • Comparison of solid state, MPM, and TWT based transmitters for spaceborne applications

    Publication Year: 1998, Page(s):256 - 259
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    This study compares current and projected state-of-the-art microwave power amplifiers used in spaceborne transmitter technologies at frequencies through 100 GHz. Projected are future trends in power PHEMTs and in wide bandgap semiconductor devices such as GaN and SiC. Also, the more established InP HEMT low-noise devices are examined for possible power amp applications specifically in the millimet... View full abstract»

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  • A remote telephone-controlled home automation system

    Publication Year: 1998, Page(s):148 - 152
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    We present a home automation system using telephone lines. The system consists of two subsystems. One is the remote control system. The other one is the phone monitoring system. The remote control system used the dual tone multi-frequency signals to control the operations of various appliances. The hardware and software are designed based on the standard telephone system. The phone monitoring syst... View full abstract»

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  • Substrate noise coupling in mixed-signal ICs

    Publication Year: 1998, Page(s):166 - 169
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    In this paper, we investigate the substrate noise coupling in the mixed-signal IC and its effect on the analog/digital circuits. A proper simulation technique for mixed-signal circuits in SPICE, operating at high speeds and high frequencies, is developed View full abstract»

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  • A high DC-gain folded-cascode CMOS operational amplifier

    Publication Year: 1998, Page(s):176 - 177
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    The architecture of folded-cascode op-amp is commonly used in many analog applications. The cascode arrangement has high open-loop voltage gain in the low frequency range that make it easy to be designed as a high-speed operational amplifier. In this paper, we present the design of a fully differential folded-cascode operational amplifier that improves the limitation on the swing of the output sig... View full abstract»

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  • Spaceborne radar performance evaluation through computer simulation

    Publication Year: 1998, Page(s):330 - 333
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    Simulation plays an important role in the design and pre-launch evaluation of radar remote sensors. This involves both hardware and software emulation of the sensor operation in a space environment. This paper describes a space radar simulation developed as an engineering tool for radar sensor development at Raytheon E-Systems St. Petersburg View full abstract»

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  • Multiresolution decomposition techniques for robust signal processing

    Publication Year: 1998, Page(s):20 - 23
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    Signal decomposition is particularly important for representing the signal components whose localization in time and frequency vary widely. The complexity of structures encountered in some signals requires adaptive low level decomposition. Signal decomposition finds applications in a wide range of areas such as signal compression, denoising, separation and extraction. This paper describes some of ... View full abstract»

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  • Electromagnetic suspension system

    Publication Year: 1998, Page(s):202 - 203
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    An electromagnetic suspension system is used to demonstrate some concepts in electromagnetics, electronics and control. This educational approach combines classroom theories with practice View full abstract»

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  • The FDTD analysis of a microstrip patch antenna with dual feed lines

    Publication Year: 1998, Page(s):84 - 86
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    The finite difference time domain (FDTD) method is used for the analysis of a square microstrip patch antenna with two microstrip feed lines. Circular polarization is obtained by feeding the lines on adjacent sides of the antenna with Gaussian pulses that are 90° out of phase. The tuning characteristics of the antenna using two feed lines on opposite sides are presented View full abstract»

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  • A new technique to reduce line-current harmonics generated by a three-phase bridge rectifier

    Publication Year: 1998, Page(s):354 - 359
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    Three-phase bridge rectifiers are widely used in industry to interface DC loads to the electric utility because of their low ripple content output and high power-handling capability. The nonlinear nature of the diode type switching devices causes significant line-current harmonics resulting in increased distortion, malfunction of sensitive electronic equipment, increased losses, and contributes to... View full abstract»

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  • SeaWinds scatterometer instrument thermal control system

    Publication Year: 1998, Page(s):252 - 255
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    The Ku-band SeaWinds scatterometer, developed for NASA's Jet Propulsion Laboratory, is part of the Earth Observing System which will measure global environmental changes. Scheduled for launch on the Japanese Advanced Earth Observing Satellite (ADEOS) in the year 2000, the instrument measures wind data over the Earth's ice-free oceans every day. The development of the 110 watt peak power radar invo... View full abstract»

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