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  • Articles  (39,800)
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  • Articles  (39,800)
Source
  • Articles: DFG German National Licenses  (23,246)
  • Latest Papers from Table of Contents or Articles in Press  (16,554)
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  • 2020-2024
  • 2015-2019
  • 1985-1989  (21,865)
  • 1980-1984
  • 1970-1974  (16,737)
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  • 1
    Electronic Resource
    Electronic Resource
    A survey of linear singular systems (1986)
    Springer
    Circuits, systems and signal processing 5 (1986), S. 3-36 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract This paper is a brief historical review of linear singular systems, followed by a survey of results on their solution and properties. The frequency domain and time domain approaches are discussed together to sketch an overall picture of the current status of the theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01600184
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  • 2
    Electronic Resource
    Electronic Resource
    Decentralized variable structure control of interconnected multi-input/ multi-output nonlinear systems (1987)
    Springer
    Circuits, systems and signal processing 6 (1987), S. 363-387 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract For a broad class of interconnected nonlinear systems, this paper develops a complete design methodology for decentralized variable structure control. Specifically, the paper sets forth design schemes for local switching surfaces and the related local switched feedback gains which together force the original nonlinear interconnected system to behave as a reduced order interconnected equivalent system having a desired response such as stability, tracking, or prespecified eigenvalues. Also developed is a numerical algorithm for constructing the switched local feedback gains. A simple nonlinear example illustrates the control strategy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01600000
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  • 3
    Electronic Resource
    Electronic Resource
    On decentralized hierarchic stabilization of a large-scale system with constraints (1987)
    Springer
    Circuits, systems and signal processing 6 (1987), S. 391-419 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract A new stabilization method of a large-scale dynamic system, consisting of a set of interconnected subsystems, is presented in this paper. The topology of the interconnected subsystems is given as a network containing nodes with only one ingoing link, and none, one, or more outgoing links. Here, when the notion “node” is used a subsystem is assumed, and the links stand for the subsystem interconnections. The stabilization method is made only by the use of local linear state feedback around each subsystem, in order to satisfy constraints given in the problem. The interconnections among the subsystems are assumed to be nonlinear, time-varying. According to the topology of the large-scale system, the method of stabilization is hierarchic, one proceeds from node to node, and is applicable from a computer standpoint. A design algorithm follows directly, and can be made using the Generate and Test method for each subsystem independently, thus enabling designers to use a computer which has a video terminal as a peripheral unit and providing a possibility for interactive applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01600232
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  • 4
    Electronic Resource
    Electronic Resource
    Estimation of structured covariances with application to array beamforming (1987)
    Springer
    Circuits, systems and signal processing 6 (1987), S. 421-447 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The estimation of covariance matrices which are structured, for example, of Toeplitz type, from measurement data is considered. The problem is considered in the context of array beamforming, and various methods of estimation are derived and compared, such comparison including consideration of the behavior of the estimate in beamforming applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01600233
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  • 5
    Electronic Resource
    Electronic Resource
    Formation of the block toeplitz matrix for two-dimensional PLSI Polynomials (1987)
    Springer
    Circuits, systems and signal processing 6 (1987), S. 449-456 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The planar least-squares inverse (PLSI) polynomials are used for stabilization of two-dimensional unstable recursive filters. In order to obtain the PLSI polynomials, the main work involved consists in forming a set of linear equations and then solving them. In this paper we present an efficient and simple method to form the necessary set of linear equations (i.e., the required coefficient matrix) for a chosen pattern and order of the desired PLSI polynomial, starting from the denominator polynomial of a two-dimensional unstable recursive filter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01600234
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  • 6
    Electronic Resource
    Electronic Resource
    System inversion using orthogonal functions (1987)
    Springer
    Circuits, systems and signal processing 6 (1987), S. 347-362 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract This paper shows how to use orthogonal functions to invert singular (i.e., generalized state-space) systems. The approach is to express the inverse system itself as a singular system, and then to apply the theory of orthogonal functions to convert that differential-algebraic system to a purely algebraicgeneralized Lyapunov equation whose solution yields the input of the original system given its output. Both left and right inversion are treated. Necessary and sufficient conditions for the existence and uniqueness of the generalized Lyapunov equation are derived, and a generalizedQZ algorithm is given for its efficient solution. It is also shown that the coefficients in the Walsh function expansion may be approximately found using an FFT-type butterfly network. These results provide both an extension in theory, by investigating the properties of a new Lyapunov equation, and an extension in the implementation of system inversion, by providing a scheme which applies to generalized state-space systems and uses an unconventional approach which may prove to be a useful contribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01599999
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  • 7
    Electronic Resource
    Electronic Resource
    Call for papers (1987)
    Springer
    Circuits, systems and signal processing 6 (1987), S. I 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01600237
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  • 8
    Electronic Resource
    Electronic Resource
    Decoupling of the overflow and quantization phenomena in orthogonal biquad recursive digital filters (1987)
    Springer
    Circuits, systems and signal processing 6 (1987), S. 457-470 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract In digital communication networks, a special class of complex biquad recursive digital filters called orthogonal filters is increasingly being used. The separate effects of the overflow and quantization nonlinearities on these orthogonal filters' responses have been investigated [5], [6]. In this paper we examine the zero-input stability properties of the actual orthogonal filter having both overflow and quantization nonlinearities. The overflow nonlinearities considered include saturation, bit-by-bit inversion, zeroing, and modulo 2 arithmetic. The quantization techniques used may be roundoff, magnitude, or value truncation. An example demonstrates the adverse coupling effect between the overflow and quantization nonlinearities. Two criteria are therefore derived to ensure asymptotic overflowstability of the filter in the presence of quantization. These criteria have been translated to the coefficient plane; various regions corresponding to different minimum wordlengths required to ensure decoupling of the overflow and quantization phenomena have been derived.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01600235
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  • 9
    Electronic Resource
    Electronic Resource
    An output error model and algorithm for electromagnetic system identification (1987)
    Springer
    Circuits, systems and signal processing 6 (1987), S. 471-505 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The identification problem for electromagnetic objects excited by transients is discussed. Several classes of models are reviewed, and an output error model is selected. An algorithm for solving the transient identification problem using this model is presented, and some of the issues connected with its use are considered. Examples of the application of this algorithm to electromagnetic data are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01600236
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  • 10
    Electronic Resource
    Electronic Resource
    Some properties of solutions of the semi-state model for nonlinear nonstationary systems (1986)
    Springer
    Circuits, systems and signal processing 5 (1986), S. 109-123 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Certain properties of solutions similar to set invariance, set attractivity, boundedness, BIBO stability, etc. are investigated for the semistate model $$P(t)\dot x = M(t,x)x + D(t,x)u,y = q(t,x,u).$$ For systems considered, it is assumed that the reduction to a normal form of lower order is not possible. Using the direct method of Liapunov, the properties of solutions are investigated without actual knowledge of solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01600190
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