Search for dissertations about: "linear time-varying"

Showing result 1 - 5 of 51 swedish dissertations containing the words linear time-varying.

  1. 1. Linear Time-Varying Systems : : Modeling and Reduction

    University dissertation from Department of Automatic Control, Lund Institute of Technology (LTH)

    Author : Henrik Sandberg; Lund University.; Lunds universitet.; [2002]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; linear time-varying; model reduction; balanced truncation; error bounds; power converters; harmonics; periodic modeling; inverter locomotive;

    Abstract : Linear time-invariant models are widely used in the control community. They often serve as approximations of nonlinear systems. For control purposes linear approximations are often good enough since feedback control systems are inherently robust to model errors. In this thesis some of the possibilities for linear time-varying modeling are studied. READ MORE

  2. 2. Model Reduction for Linear Time-Varying Systems

    University dissertation from Department of Automatic Control, Lund Institute of Technology (LTH)

    Author : Henrik Sandberg; Lund University.; Lunds universitet.; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Model reduction; Linear systems; Time-varying systems; Error bounds; Frequency-domain analysis; Convergence analysis; Performance limitations; Automation; robotics; control engineering; Automatiska system; robotteknik; reglerteknik;

    Abstract : The thesis treats model reduction for linear time-varying systems. Time-varying models appear in many fields, including power systems, chemical engineering, aeronautics, and computational science. They can also be used for approximation of time-invariant nonlinear models. Model reduction is a topic that deals with simplification of complex models. READ MORE

  3. 3. Dynamic Programming and Time-Varying Delay Systems

    University dissertation from Department of Automatic Control, Lund Institute of Technology (LTH)

    Author : Bo Lincoln; Lund University.; Lunds universitet.; [2003]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; control engineering; Automatiska system; robotteknik; reglerteknik; robotics; Automation; Stability analysis; Time-varying delays; Dynamic programming; Switched linear systems;

    Abstract : This thesis is divided into two separate parts. The first part is about Dynamic Programming for non-trivial optimal control problems. The second part introduces some useful tools for analysis of stability and performance of systems with time-varying delays. READ MORE

  4. 4. On Parameter Estimation and Control of Time-Varying Stochastic Systems

    University dissertation from Department of Mathematical Statistics, Lund University

    Author : Bengt Lindoff; Lund University.; Lunds universitet.; [1997]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Statistics; Adaptive Predictive Control; Adaptive Stochastic Control; Dual Control; Convergence Analysis; Quadratic Forms; Forgetting Factor; Recursive Least Squares; Recursive Estimation; Linear Systems; Time-Varying Stochastic Systems; operations research; programming; actuarial mathematics; Statistik; operationsanalys; programmering; aktuariematematik;

    Abstract : This thesis is about parameter estimation and control of time-varying stochastic systems. It can be divided into two parts. The first part deals with an estimation algorithm commonly used when estimating parameters in time-varying stochastic systems, the Recursive Least Squares (RLS) algorithm with forgetting factor. READ MORE

  5. 5. Studies on identification of time-variant and time-varying nonlinear systems

    University dissertation from Stockholm : Signaler, sensorer och system

    Author : Anders Nordsjö; KTH.; [1998]
    Keywords : ;

    Abstract : This thesis addresses same aspects of nonlinear systemidentification. In par ticular, it is assumed that theconsidered systems can be described by the Wiener model whichconsists of a dynamit linear part followed by a nonbnear partor the Haxnmerstein model in which the order of these twoblocks is reversed. READ MORE