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System Theory, 1998. Proceedings of the Thirtieth Southeastern Symposium on

Date 10-10 March 1998

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Displaying Results 1 - 25 of 108
  • Proceedings of Thirtieth Southeastern Symposium on System Theory

    Publication Year: 1998
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    Freely Available from IEEE
  • Authors index

    Publication Year: 1998, Page(s):555 - 556
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    Freely Available from IEEE
  • An extension of the tracking index concept to non-Kalman filter selection techniques

    Publication Year: 1998, Page(s):373 - 376
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    In this note, we determine several different ways of relating the tracking index of Kalata (1984) to a cost function optimization method of calculating the filter coefficients. The cost function method can be used to define a tracking index. Thus, we demonstrate the relationship between the two methods View full abstract»

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  • A dynamic simulation model of magnetization reversal

    Publication Year: 1998, Page(s):93 - 97
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    Some preliminary simulation results of a new dynamic micromagnetic model are presented. The model is based on a dynamic interpretation of an energy minimization process. It is used to study magnetization reversal and hysteresis. Our simulation results are compared with those generated by solving a traditional gyromagnetic dynamic equation coupled with the phenomenological Landau-Lifshitz damping View full abstract»

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  • Propagation properties of a wedge-shape waveguide with conductor and dielectric boundaries

    Publication Year: 1998, Page(s):447 - 451
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    Attention is focused on a wedge-shape waveguide consisting of two conducting plane boundaries with the interior of the wedge partially filled with a dielectric material. The remaining portion of the wedge interior is free space or is occupied by another dielectric material of lower dielectric constant. The dielectric-free space boundary is assumed to be circularly cylindrical. A special case of th... 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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  • A study on the application of wavelet analysis to power quality

    Publication Year: 1998, Page(s):350 - 353
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The quality of electric power is a major concern, since poor electric power quality results in malfunctions, instabilities and shorter lifetime of the load. The poor quality of electric power can be attributed to power line disturbances such as waveshape faults, overvoltages, capacitor switching transients, harmonic distortion and impulse transients. For diagnosing power quality problems, the caus... View full abstract»

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  • Using PSpice to model the cooling performance of convective surfaces

    Publication Year: 1998, Page(s):85 - 89
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    The electronic circuit simulator PSpice can provide the means of obtaining numerical non-analytic solutions to thermal heat flow problems which would otherwise be difficult or impossible to derive. Rules for relating physical heat flow parameters to equivalent distributed lossy transmission line parameters are derived. This method for numerical evaluation of the heat dissipating performance of com... View full abstract»

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  • 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 (452 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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  • 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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  • An optical Aharonov-Albert-Vaidman effect

    Publication Year: 1998, Page(s):441 - 446
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    The notion of the weak value of a quantum mechanical observable has recently been introduced by Aharonov et al. (Phys. Rev A 41,11 (1990)), hereafter referred to as AAV. We have performed an experiment similar to one proposed by Knight et al. (1990) and demonstrated that weak values can be observed and that they exhibit the properties described by AAV within the regime of validity. We suggest that... View full abstract»

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  • Management Science Applications Of Optimal Control Theory

    Publication Year: 1998, Page(s): 3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    First Page of the Article
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  • Decentralized estimation: an indirect method

    Publication Year: 1998, Page(s):366 - 369
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    Presents an indirect method for decentralized estimation of interconnected large scale systems. The estimators are obtained in two steps: an approximate model for the desired local variables, using optimal aggregation techniques, is derived in the first step and in the second step a local filter is derived using the model obtained in the first step and local measurements. Kalman filtering and H-&i... View full abstract»

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  • SEDSAT solar array output power analysis

    Publication Year: 1998, Page(s):345 - 349
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    This paper analyzes SEDSAT's solar array's illumination and power conditions. It uses the method of coordinate frame transformation to compute the sun angles on the solar arrays. It defines the solar array's normal direction in the geocentric orbital coordinate So, and then gets the new normal direction of solar array at the viewer frame (from the sun). The method can be applied on any kind of orb... View full abstract»

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  • Switching direct tracking adaptive control for unknown systems

    Publication Year: 1998, Page(s):160 - 164
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    In this paper, a new robust switching direct tracking adaptive control law (SDTACL) for a class of vector systems with unknown constant parameters and bounded disturbances is developed. The proposed SDTACL can overcome the drawbacks of dead-zone adaptive control and σ-modification adaptive control laws. Compared with switching-Σ adaptive control law (SSACL), it needs fewer free design ... 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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  • 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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  • Generation of a short pulse by optical free induction decay (OFID) using the rising edge of a TEA CO2 laser pulse for excitation

    Publication Year: 1998, Page(s):460 - 463
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    The generation of short CO2 laser pulses is achieved in several ways such as the optical free induction decay (OFID) technique. The OFID technique is a relatively simpler mechanism of generating short pulses and easily invites further study of the technique. The present work involves the interaction of the rising edge of a pulsed CO2 laser with ammonia and Dymel in an effort... View full abstract»

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  • Visualization of complex physical phenomena with Mathematica(R): opportunities for use in education

    Publication Year: 1998, Page(s):15 - 19
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Classroom instruction in the physical sciences and engineering entails the introduction of complex principles that can be extremely difficult to relate to one's past experiences. These principles are most often set forth as mathematical equations, which can be manipulated and solved to arrive at a particular result, and so come to describe and predict the behavior of the systems they represent. Ce... View full abstract»

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  • Automated lumber processing system (ALPS): an industrial prototype

    Publication Year: 1998, Page(s):476 - 479
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    For the past few decades, researchers have devoted time and effort to applying automation and modern computer technologies to improving the productivity of traditional industries. To be competitive, one must streamline operations and minimize the production costs while maintaining an acceptable margin of profit. This paper describes the effort of one such endeavor directed towards improving the ha... View full abstract»

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  • Vector quantization of LSP parameters by split

    Publication Year: 1998, Page(s):434 - 437
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    An important problem in speech coding is the quantization of the linear predictive coefficients (LPC) with the smallest possible number of bits. Since the direct quantization of LPC coefficients is known to be unsatisfactory, we consider this problem for an equivalent representation namely the line spectrum pairs (LSPs). The performance of two algorithms for the quantization of the LSP parameters ... View full abstract»

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  • A neural network based parametrization method for distributed parameter identification

    Publication Year: 1998, Page(s):361 - 365
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    We consider distributed parameter systems governed by elliptic or parabolic partial differential equations with an unknown coefficient that is spatially varying over a certain domain. We propose an identification procedure that combines neural classification, zonation, function interpolation, and optimization search. There are at least two major advantages of this approach: classification capabili... View full abstract»

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  • Meeting increasing electric load demand in a deregulated utility; an economic comparison

    Publication Year: 1998, Page(s):341 - 344
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Wind power is considered as one of the cheapest and most environmental friendly renewable energy sources available today. The use of this energy source in distribution systems has increased considerably since 1986 due to technological advances. Hybrid wind electric energy generators consist of one or more wind generators and either standby diesel generators or other energy conversion systems or en... View full abstract»

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  • Extension of the partial state feedback approach to the control of robotic manipulators

    Publication Year: 1998, Page(s):297 - 301
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    This work proposes a simple robot control algorithm requiring position measurements only. The control scheme is shown to be suitable for point-to-point tasks of rigid-link robots with gravity compensation and for flexible joint robots with no gravitational effects. Lyapunov stability analyses show global asymptotic error convergence for both cases. In addition, the proposed controller does not req... View full abstract»

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  • Application of change detection technique to ultrasound signal processing. Use of spectral parametric estimation, time-frequency and wavelet

    Publication Year: 1998, Page(s):203 - 207
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    Concerns the use of parametric-adaptive tools for ultrasound signal processing in nondestructive materials testing. A wave generated by a piezoelectric transducer is propagated across a sample, and the response signal is processed. The spectral ratio method used for calculating the quality factor of a material is not very accurate when Fourier analysis is used. We show that determination of the qu... View full abstract»

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