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[Proceedings] 1992 IEEE International Symposium on Circuits and Systems

10-13 May 1992

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Displaying Results 1 - 25 of 103
  • New results for the design of robust strict positive real systems

    Publication Year: 1992, Page(s):2729 - 2732 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (269 KB)

    The design of filters ensuring convergence of algorithms in the presence of uncertainty in the plant model is a key problem in the area of identification and adaptive control. The authors provide design criteria for filters which yield a family of uncertain discrete time polynomials that are strict positive real over an assigned region of the complex plane. The family of polynomials is defined in ... View full abstract»

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  • Interval trigonometric polynomials and wavenumber response of n-D FIR digital filters

    Publication Year: 1992
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (33 KB)

    Summary form only given. The scope for determining the lower and upper bounds for the wavenumber response of a multidimensional interval finite impulse response (FIR) filter from the corresponding bounds for each element of a subset of extreme filters is investigated.<> View full abstract»

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  • An interactive object-oriented neural network simulator applied to the recognition of acoustical signals

    Publication Year: 1992, Page(s):2937 - 2940 vol.6
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    An interactive object-oriented layer-based simulator is presented. It is intended for large-scale investigations of artificial neural networks (ANNs), and consists of two parts. The first is a simulation kernel, whose underlying base model is a layer of units, processing inputs to outputs. The core model has no knowledge of the ANN, but serves as a base for specialized layers. The second is the in... View full abstract»

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  • An error-detectable array for all-substring comparison

    Publication Year: 1992, Page(s):2941 - 2944 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    All-substring comparison for pattern P and string S gives the minimum distance between P and all the consecutive substrings in S, which is more general than usual string comparison problems. Run-time error detection is a desirable property in practice. The author designs an error-detectable systolic array for the problem of all-substring comparison, and analyzes the performance of the design. He i... View full abstract»

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  • Parallel encoder, decoder, detector, corrector for cyclic redundancy checking

    Publication Year: 1992, Page(s):2945 - 2948 vol.6
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    Redesigning the linear feedback shift register so that syndrome calculations can be performed in one sweep allows for fast error control in high-speed computer networks. The resulting structure forms the basis of the PEDDC (parallel encoder, decoder, detector, corrector) which replaces the conventional SEDDC (serial encoder, decoder, detector, corrector) for generation and utilization of cyclic co... View full abstract»

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  • Design of piecewise-linear Markov maps generating white chaos: an inverse problem of dynamical systems

    Publication Year: 1992, Page(s):2805 - 2808 vol.6
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    Discusses the design of a discrete dynamical system generating chaos with a white spectrum. This chaos is referred to as white chaos. The results on the design of a piecewise-linear Markov map generating white chaos are summarized. For any number of subintervals of maps, maps always exist if the rank of the incident matrix is equal to 1. However, no piecewise linear Markov map whose incident matri... View full abstract»

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  • The real homotopy-based method for computing solutions of electric power systems

    Publication Year: 1992, Page(s):2737 - 2740 vol.6
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Presents a real homotopy-based method to calculate the roots of any system of polynomial equations in n real variables. This method eliminates some of the computational effort required in the existing homotopy- and imbedding-based continuation methods. The method allows for the computation of real solutions of even large-sized deficient polynomial systems. As an example, the method is app... View full abstract»

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  • Stability under sensor or actuator failures

    Publication Year: 1992, Page(s):2712 - 2715 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The authors consider the standard linear, time-invariant, multi-input multi-output unity-feedback system with possible failures in the sensor or actuator connections. They parametrize the set of all controllers such that the closed-loop system is stable when sensors or actuators fail. Two classes of failures are considered: the failure of one connection and the failure of any number of connections... View full abstract»

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  • A general purpose VLSI chip for robot axis motion controller

    Publication Year: 1992, Page(s):3005 - 3008 vol.6
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    A VLSI-based realization and implementation of an entire robot axis controller is proposed as a single-chip joint controller. This chip requires a 68000-bus family microprocessor (MP) and a power transistor module. It forms a three-component complete robot servo-level controller which correlates all joint electromechanical activities with the supervisor level (main robot CPU). The proposed chip is... View full abstract»

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  • Chaotic behaviour of distributed nonlinear circuits

    Publication Year: 1992, Page(s):2809 - 2812 vol.6
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A detailed procedure for analyzing the chaotic behavior of a second-order negative resistance distributed oscillator is presented. Both cases of commensurate transmission lines and noncommensurate transmission lines are considered. The negative resistance characteristics as well as the relative length of the transmission lines play an important role in the qualitative behavior of the circuit. The ... View full abstract»

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  • Adaptive estimation of frequency in power networks

    Publication Year: 1992, Page(s):2741 - 2744 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    A common problem in power networks is the estimation of the fundamental frequency of harmonic signals. The authors propose and examine two related methods that use the autoregression as an underlying model, avoid the estimation of its parameters, and determine the fundamental frequency directly. They are intended to operate on signals which, besides the fundamental, may contain harmonic components... View full abstract»

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  • Robust lead-lag compensation for a family of uncertain linear systems

    Publication Year: 1992, Page(s):2716 - 2719 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    The authors describe a new control design technique for interval systems whose transfer function coefficients are described by some prescribed intervals. The objective of design is to obtain a lead-lag compensator for the given interval system so that the entire family of systems meets given design requirements. The design method is based on new frequency domain tools for such uncertain systems. A... View full abstract»

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  • Ties between classical energy based Lyapunov functions in nonlinear circuits and power systems

    Publication Year: 1992, Page(s):3009 - 3012 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Lyapunov and energy-based stability analysis for estimating regions of attraction for stable equilibria in power system models has a very long history. The author provides tutorial background on the development of such energy analysis with the goal of establishing connections between the types of energy functions employed in power systems and classical energy based Lyapunov functions in circuits. ... View full abstract»

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  • Dynamic behaviors in two novel autonomous circuits with a physical negative resistor characterized by nonsymmetric function

    Publication Year: 1992, Page(s):2813 - 2816 vol.6
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    Presents two novel three-order autonomous circuits. The nonlinear element in the circuits may be any physical negative resistor, either piecewise-linear or irregular. Using a type-S negative resistance element, the authors observed the double scroll attractors similar to that in Chua's circuit. Using an avalanche transistor, they observed more complicated dynamic behaviors than in other autonomous... View full abstract»

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  • A computation of power system characteristic by general homotopy and investigation of its stability

    Publication Year: 1992, Page(s):2745 - 2748 vol.6
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    Presents an application of a general homotopy method to the computation of the characteristics of a power system such as PV curves. The load flow equations are derived from a set of nonlinear differential and algebraic equations. A homotopy continuation method is used for following the characteristics of the power system. The stability of the load flow solutions is discussed by deriving the variat... View full abstract»

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  • Wave-domino logic: timing analysis and applications

    Publication Year: 1992, Page(s):2949 - 2952 vol.6
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Wave-pipelining has been investigated extensively as a design method to increase clock frequencies of digital systems. The authors explore wave-pipelining of domino CMOS circuits because of their compact layouts and shorter delay time. A timing model and constraints are given for deriving the minimal period. Partitioning and restructuring of circuits for wave-pipelining are discussed. A test chip ... View full abstract»

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  • Minimality, stabilizability and strong stabilizability of uncertain plants

    Publication Year: 1992, Page(s):2720 - 2722 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    The authors consider a set of uncertain transfer functions whose numerators and denominators belong to independent polytopes. It is shown: (1) that the members of this set are free from pole-zero cancellations if all the ratios of numerator edges and denominator edges are free from pole-zero cancellations and the numerator and denominator corners evaluated at a finite number of points satisfy cert... View full abstract»

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  • Adaptive FIR-WOS hybrid filtering

    Publication Year: 1992, Page(s):2637 - 2640 vol.6
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    Through the combination of linear finite impulse response (FIR) filters and weighted order statistic (WOS) filters, the authors introduce a new class of nonlinear filters called FIR-WOS hybrid (FWH) filters. This class of filters, including FIR filters, WOS filters, and various kinds of FIR median hybrid (FMH) filters, consists of a few linear FIR subfilters and a WOS filter operated over the outp... View full abstract»

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  • Monolithic CMOS compandors based on Σ-Δ oversampling

    Publication Year: 1992, Page(s):2649 - 2652 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The CMOS compandor circuit presented is based on sigma-delta (Σ-Δ) oversampling. The Σ-Δ modulator converts an analog signal into a binary sequence, so that it can multiply another signal by on-and-off switching. Continuous-time CMOS multipliers, which are difficult to implement with high linearity, are not required in such a compandor configuration. Simulation results of a... View full abstract»

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  • Nonlinear static and dynamical aspects of power systems: a bifurcation approach

    Publication Year: 1992, Page(s):3013 - 3016 vol.6
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    The author presents basic concepts in bifurcation theory which can be applied to study the voltage stability and nonlinear oscillations of power system networks. Dynamical systems are considered with one parameter. Changing the parameter may drive the system from one asymptotic behavior to another and result in different bifurcations. Typical static bifurcations are (i) saddle-node or fold bifurca... View full abstract»

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  • A novel neural network for object recognition with blurred shapes

    Publication Year: 1992, Page(s):2901 - 2904 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Presents a neural network approach to shape recognition. The emphasis is on the development of an effective representation method to increase the degree of robustness in recognition of shapes which may be blurred by noise. A space-perturbation neural network is described which is characterized by two important properties. (1) The network can be trained using error back-propagation with only noise-... View full abstract»

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  • A new approach to global optimization using ideas from nonlinear stability theory

    Publication Year: 1992, Page(s):2817 - 2820 vol.6
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Describes a method for determining the global optimum of a function on a compact manifold. The method determines and connects all the local minima and local maxima of a function on a compact manifold. The method is based on properties of stability regions associated with the equilibria of the gradient vector field. Applications of the method include global optimization and nonlinear equation solvi... View full abstract»

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  • A model for the inclusion of reactive constraints in a linearized optimal active power flow

    Publication Year: 1992, Page(s):2749 - 2752 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    Presents a model for considering voltage and reactive injection limits within a linearized active DC power flow. An extension of the Benders decomposition algorithm is used to express reactive constraints as a function of the active control variables. The authors describe a new model for the representation of reactive constraints as linear functions of the active power injections. The proposed app... View full abstract»

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  • Image restoration using a multilayer perceptron with a multilevel sigmoidal function

    Publication Year: 1992, Page(s):2917 - 2920 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The problem of restoring a blurred and noisy image having many gray levels, without any knowledge of the blurring function and the statistics of the additive noise is considered. A multilevel sigmoidal function is used as the node linearity. Restoration is achieved by exploiting the generalization capabilities of the multilayer perceptron network. To overcome the burden of training time a segmenta... View full abstract»

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  • An on-line reconfiguration algorithm of WSI processor arrays

    Publication Year: 1992, Page(s):2953 - 2956 vol.6
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The authors propose an on-line reconfiguration algorithm for WSI processor arrays. An on-line reconfiguration algorithm requires the ability to reconfigure itself automatically without an external control. The proposed reconfiguration is guided by the assignment rules. The assignment rules are established based on the available interconnection resources. The algorithm achieves high reliability as ... View full abstract»

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