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Browsing EECS Faculty Publications by Issue Date

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Browsing EECS Faculty Publications by Issue Date

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  • On Schwarz canonical form for large system simplification
    Lal, M.; Mitra, R.; Jain, A. (IEEE, 1975-04-01)
    Recently a new technique for the reduction of a large-order dynamical system, using Schwarz canonical form, has been proposed [1]. It is presently shown that the above is essentially a frequency domain technique for which ...
  • Identification of nonlinear systems in frequency domain
    Shanmugam, K. Sam; Jong, M.T. (IEEE, 1975-11-01)
    A frequency domain technique for identifying a class of nonlinear systems is presented. The class of nonlinear systems we consider in this paper consists of a power series nonlinearity sandwiched between two linear systems ...
  • Experimental results of the remote sensing of sea-surface salinity at 21-cm wavelength
    Thomann, Gary C. (IEEE, 1976-07-01)
    The complex dielectric constant of sea water is a function of salinity at 21-cm wavelength, and sea-water salinity can be determined by a measurement of radiometric temperature at 21 cm along with a measurement of thermodynamic ...
  • Authors' reply
    Lal, M.; Mitra, R. (IEEE, 1976-08-01)
  • The zoom FFT using complex modulation
    Hoyer, E.A.; Stork, R. (IEEE, 1977-05-01)
    A recent paper by Yip discussed the zoom transform as derived from the defining equation of the FFT. This paper simplifies the concepts and removes some of the restrictions assumed by Yip; ie., the total number of points ...
  • An algorithm for the two dimensional FFT
    Hoyer, E.A.; Berry, W. (IEEE, 1977-05-01)
    Conventional two dimensional fast Fourier transforms become very slow if the size of the matrix becomes too large to be contained in memory. This is due to the transposition of the matrix that is required. This new algorithm ...
  • Two-dimensional zoom FFT
    Stork, R.; Hoyer, E.A. (IEEE, 1978-04-01)
    The concept of the zoom FFT (a more efficient algorithm which allows zooming in on a narrow segment of the spectrum while preserving its frequency content) is extended to the two-dimensional case. The technique is further ...
  • An optimal frequency domain filter for edge detection in digital pictures
    Shanmugam, K. Sam; Dickey, Fred M.; Green, James A. (IEEE, 1979-01-01)
    Edge detection and enhancement are widely used in image processing applications. In this paper we consider the problem of optimizing spatial frequency domain filters for detecting edges in digital pictures. The filter is ...
  • Optimal control systems with low sensitivity to small time delays
    Sawan, M. Edwin; Cruz, J. B. (IEEE, 1979-12-01)
    The problem of reducing trajectory sensitivity to small time delays is considered. State and output feedback gains are computed, so that the system performs optimally with low sensitivity. The delay is assumed to be expected ...
  • A digital quarter square multiplier
    Johnson, Everett L. (IEEE, 1980-03)
    An application of the quarter square multiplication technique used in analog computing is proposed for digital multiplication. Significant savings in storage requirements for ROM- implemented product tables are demonstrated. ...
  • Decoupling of large scale systems
    Shah, Dipak C.; Sawan, M. Edwin; Tran, Minh T. (IEEE, 1984-06-06)
    Linear shift invariant large scale discrete-time multivariable systems whose inputs and outputs are strongly interacted, are considered. The designing of compensators to decouple these systems is presented.
  • On the eigenvalue placement of discrete-time systems with slow and fast modes
    Shah, Dipak C.; Sawan, M. Edwin; Tran, Minh T. (IEEE, 1984-06-06)
    Linear shift invariant discrete-time systems with slow and fast modes are considered. Singular perturbation techniques are used to obtain the slow subsystem and the fast subsystem. A reduced-order control is designed for ...
  • Measurement of Gaussian beam diameter using ronchi rulings
    Karim, M.A. (IEEE, 1985-05-09)
    The analytical and experimental scope of the generalised Ronchi ruling method for the measurement of Gaussian laser beam diameter is presented. The effects of the ruling periodicity, ruling duty cycle, ruling type and the ...
  • Estimation of maximum amplitudes of conductor galloping by describing function analysis
    Egbert, Robert I (IEEE, 1986-01-01)
    Estimates of maximum amplitudes of conductor galloping are needed in order to determine appropriate phase-to-phase clearances on overhead lines. A new method for computing these estimates is presented. The method gives ...
  • Estimation of maximum amplitudes of conductor galloping by describing function analysis
    Egbert, Robert I (IEEE, 1986-01-01)
  • Output feedback design of singularly perturbed discrete-time systems
    Oloomi, Hossein; Alyatim, Amjad; Sawan, M. Edwin (IEEE, 1986-06-18)
    The output feedback regulator design for linear shift-invariant discrete-time systems possessing the two-time-scale property is considered. An approximating quadratic performance index is derived, reflecting a two-time-scale ...
  • The observer-based controller design of the discrete-time singularly perturbed systems
    Oloomi, Hossein; Sawan, M. Edwin (IEEE, 1986-06-18)
    The dynamic feedback control for a class of linear shift-invariant discrete-time singularly perturbed systems with inaccessible states is considered through a separate observer-based controller design for two lower-dimensional ...
  • The observer-based controller design of discrete-time singularly perturbed systems
    Oloomi, Hossein; Sawan, M. Edwin (IEEE, 1987-03-01)
    A class of linear shift-invariant discrete-time singularly perturbed systems with inaccessible states is considered. A design technique is formulated by which the stabilizing controller can be formed through the controllers ...
  • On the robustness of observer-based controllers
    Beheshti, M. T.; Sawan, M. E. (IEEE, 1987-06-10)
    In this paper, we investigate the robustness of the observer-based controller under Parameter perturbations. Our goal is to find the conditions for insensitivity of the optimal observer-based controller to parameter ...
  • On the design of high gain feedback sampled-data systems
    Oloomi, Hossein; Sawan, M. Edwin (IEEE, 1987-12-01)
    Disturbance decoupling problem for a class of sampled-data systems with small sampling periods is investigated using singular perturbation methods

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