By Topic

1993 (25th) Southeastern Symposium on System Theory

7-9 March 1993

Filter Results

Displaying Results 1 - 25 of 122
  • Author index

    Publication Year: 1993
    Request permission for commercial reuse | PDF file iconPDF (186 KB)
    Freely Available from IEEE
  • 1993 (25th) Southeastern Symposium on System Theory

    Publication Year: 1993
    Request permission for commercial reuse | PDF file iconPDF (548 KB)
    Freely Available from IEEE
  • The effects of a nearby biological body on the parameters of a small hand-held radio operating in the H.F. band (3MHz-30MHz)

    Publication Year: 1993, Page(s):24 - 28
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The effects of a nearby biological body on the efficiency and radiation patterns of a small hand-held radio operating in the H.F. band are determined by computer modeling. The close proximity of the radio operator's body results in the scattered field from the body reradiating and perturbing the known free-space current distribution in the antennas to some extent. However, due to the extremely sma... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficient numerical evaluation of the Kirchhoff field scattered from a hollow circular cylinder

    Publication Year: 1993, Page(s):22 - 23
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    A convenient and simple algorithm is derived for computing the Kirchhoff approximation for the field scattered by an acoustically hard tubular obstacle. Special Weber function evaluations are explicitly avoided through the use of the fast Fourier transforms (FFT) approximation for Fourier coefficients. Selected scattered diagram predictions are contrasted with the accurate solution of the Neumann ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Approximation and control of systems using a neural net

    Publication Year: 1993, Page(s):594 - 598
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    The use of multilayer neural networks for approximating linear and nonlinear systems is demonstrated. The gradient method is discussed in detail. Single-input/single-output and double-input/single-output systems are considered, and gradient (backpropagation) methods are used to adjust the parameters of a three-layer neural network in order to optimize a performance function. The results of simulat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Quasi-static analysis of microstrip transmission line systems

    Publication Year: 1993, Page(s):16 - 20
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    A spectral domain method is employed for determining the capacitance per unit length of microstrip transmission lines. The equations that are enforced using the spectral domain method are derived, and the details of the numerical implementation of this technique are discussed. The numerical procedure converges very quickly, and the numerical results are in good agreement with those obtained from o... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simulation of target responses to high frequency ultra wideband radar signals using the physical optics impulse response

    Publication Year: 1993, Page(s):11 - 15
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    High-frequency ultrawideband radar signals are constructed by modulating a microwave or millimeter wave carrier with a broad bandwidth signal with the percentage bandwidth of the modulating signal being typically more than 20% of the carrier frequency. The wideband properties of the signal render the single-number radar cross section (RCS) inadequate for target response simulations. Instead, a cha... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamic modelling and link mechanism of mobile robot

    Publication Year: 1993, Page(s):368 - 372
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    After investigating muscle structures and their functions in insect legs, a four-legged mechanical model that completely describes any kinds of leg motion and structure is developed. Dynamic equations of motion, inverse kinematics, foot trajectory equations, and reaction forces are derived. To design a computationally efficient leg mechanism, a computer program called WALK is developed and used to... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A parallel architecture for performing real time multi-line optical character recognition

    Publication Year: 1993, Page(s):533 - 536
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The design of a multiprocessor parallel architecture for performing real-time multiline optical character recognition (MLOCR) is described. MLOCR is a computationally intensive application involving real-time digitization of images, pattern recognition, feature extraction, scaling, rotation and gray-scale thresholding, and character recognition. System organization, control and subsystem partition... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Application of PC-based measurement techniques to ASD performance evaluation

    Publication Year: 1993, Page(s):74 - 78
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    Two basic techniques that can be used in a laboratory environment to evaluate the performance of an adjustable speed drive (ASD) are discussed: sampling and direct. The sampling technology relies on computer technology, since it requires reliable, high-performance A/D converters along with sophisticated data interpretation techniques. While several sources of error are possible in the various isol... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An overview of methods for simulation of nonlinear IF radar hardware components at baseband frequencies

    Publication Year: 1993, Page(s):184 - 188
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    It is shown that the high sampling rate requirements of credible electronic countermeasure (ECM) simulations can be greatly reduced by developing baseband frequency models that are based on closed-form solutions, called nonlinear describing functions, which accurately define the effects that IF nonlinearities impose on realistic ECM signals. Two methods are given for obtaining the nonlinear descri... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of a programmable rainfall simulator

    Publication Year: 1993, Page(s):215 - 217
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    A programmable controller (PIC) was designed to provide a greater flexibility in rainfall simulator research. The PIC controlled the rainfall simulator using a process control board employing a microprocessor. This control board provided programmable capability previously unavailable in field research. Software to control the system was developed using assembly language and a microprocessor emulat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pixel-feature-controlling edge detection based on regularization (PEDBOR)

    Publication Year: 1993, Page(s):498 - 502
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    The PEDBOR algorithm, in which a threshold function is used for all images, is presented. The algorithm is iterative. In each iteration, pixels are first grouped into three categories: edge pixels, homogeneous region pixels, and noise pixels based on the magnitude of the gradient and the orientation distribution of the gradient in the neighborhood of each pixel. After grouping, a regularization pr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Coupling between two-conductor multi-layer shielded microstrip transmission line

    Publication Year: 1993, Page(s):6 - 10
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The quasi-static TEM mode of a shielded microstrip transmission line is analyzed. The transmission line consists of two perfectly conducting coplanar strips located between two ground planes. Four different dielectric regions are considered: two layers of substrates, a rectangular notch below the strips, and an overlay or a superstrate. The effects of the structure parameters of the shielded trans... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Invariant optimal control in linear dynamic systems

    Publication Year: 1993, Page(s):328 - 331
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    The invariant linear-quadratic regulator and servomechanism problem is considered. Solution techniques based on differential-algebraic equations solution are developed. It is not necessary to know the given trajectory and disturbance on the control interval ahead of time. It is enough to know them only at the current time. An example is given View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Model reference adaptive control system hyperstability analysis

    Publication Year: 1993, Page(s):307 - 309
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    The stability of the model reference adaptive control system with external disturbance and unmodeling is discussed. Instead of Lyapunov's method, more general results have been acquired for the analysis of hyperstability. It is shown that if only the linear forward block can be made strictly positive real, then the globally asymptotical hyperstability of the error model structure will be guarantee... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of a robotic feeder

    Publication Year: 1993, Page(s):363 - 367
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The use of US Office of Technology Assessment (OTA) recommendations to develop the design specifications of an inexpensive two-degree-of-freedom robot arm for use in rehabilitation applications is described. The current status of the robotic self-feeder is presented along with the mechanical, electrical, and control software design View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A simulation model for the analysis of a cluster-based multiprocessor system

    Publication Year: 1993, Page(s):457 - 461
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A cluster-based multiprocessor system that was introduced and analyzed by D. Agrawal and I. Mahgoub (1985, 1987) is considered. The analysis was based on an approximate analytical model, and the results were compared with those obtained for the crossbar and multiple-bus systems using the same model. A simulation model that relaxes two unrealistic assumptions of the approximate analytical model use... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On interacting finite state machine design with self-checking capability

    Publication Year: 1993, Page(s):418 - 422
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    A technique for designing interacting finite-state machines that will be totally self-checking for any single stuck-at fault is presented. M-out-of-n codes are used for both primary output and state assignments. The next state logic (NSL) for each submachine and the output logic (OL) realized are such that any single stuck-at fault results in either single bit error or unidirectional multibit erro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Artificial neural network for identification and tracking control of a flexible joint single-link robot

    Publication Year: 1993, Page(s):233 - 237
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    An artificial neural network for identification and tracking control of a nonlinear flexible joint robot with model reference adaptive control structure is developed. Neural network identification (NNI) is used to obtain a dynamic model of a flexible joint robot to be controlled. Once NNI has closely matched the dynamic model of a flexible joint robot, neural network control (NNC) of tracking traj... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Measured performance of an 1-persistent CSMA on the bus based on the discrete space-time model

    Publication Year: 1993, Page(s):560 - 564
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A study of 1-persistent carrier-sense multiaccess (CSMA) on the bus topology is reported. The discrete space-time model, which is represented by a spatial distribution of stations and a sequence of packet arrival time and its propagation delay is used. The throughput of the system with a finite number of stations is evaluated. Numerical results show that the throughput is much higher than for the ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Surface reconstruction of concealed objects

    Publication Year: 1993, Page(s):529 - 532
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    A methodology for surface reconstruction that uses distance as the metric in determining an appropriate solution is presented. This metric is used because the primary application of the method is for reconstructing objects inside luggage, which requires a fast solution. Corner points from one contour are mapped to the other contour. The results do not produce a Eulerian path. Additional span lengt... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Object-oriented programming for power engineering education

    Publication Year: 1993, Page(s):69 - 73
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The authors describe the object-oriented approach, which is currently being touted as a means of making programmers more productive but will require new approaches to viewing old problems. They discuss how object-oriented programming techniques can be applied to the development of power-engineering-related software. Segments of code that were used in a three-phase load flow program are used as exa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A heuristic approach to the computation of 3D-ray trajectories in step index optical fibers

    Publication Year: 1993, Page(s):179 - 183
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    Three-dimensional-ray trajectories in an optical fiber are derived using a simple correspondence principle. The ray trajectories are linked to the mode number of the exact waveguide solutions. The analysis and simulations presented are in terms of dimensionless parameters needed to characterize the optical fiber. Specifically, this includes the V-parameter, the core index of refraction, and the nu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An analytic study of porosity evolution in powder metallurgy forming process

    Publication Year: 1993, Page(s):210 - 214
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The behavior of a porous metal in a closed-die compression test is studied with the aid of a Gurson-type model, and the results are compared with the results obtained from its quadratic approximation and the yield functions of S. Shima and M. Oyane (1976) and S.M. Doraivelu et al. (1984). Once the initial porosity and the effective stress-strain relation for the matrix is provided, the response of... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.