Search for dissertations about: "Henrik Sandberg"

Found 4 swedish dissertations containing the words Henrik Sandberg.

  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. Security metrics and allocation of security resources for control systems

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Jezdimir Milošević; Henrik Sandberg; Ling Shi; [2020]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cyber-Security; Cyber-Attacks; Cyber-Physical Systems; Networked Control Systems; Model Based Impact Analysis; Security Metrics; Risk Management; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Achieving a sufficient level of security of control systems is very important, yet challenging. Firstly, control systems operate critical infrastructures vital for our society. Hence, attacks against them can result in dire consequences. READ MORE

  4. 4. Nonlinear optimization approaches to H2-norm based LPV modelling and control

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Daniel Petersson; Lennart Ljung; Johan Löfberg; Henrik Sandberg; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Information technology Automatic control; TEKNIKVETENSKAP Informationsteknik Reglerteknik;

    Abstract : To be able to analyze certain classes of non-linear systems, it is necessary to try to represent them as linear parameter varying systems or even as linear fractional representations. For linear parameter varying systems and linear fractional representations of systems there exists many advanced analysis methods such as IQC-analysis and μ-analysis. READ MORE