Search for dissertations about: "Anna-karin Christiansson"

Showing result 1 - 5 of 12 swedish dissertations containing the words Anna-karin Christiansson.

  1. 1. A general framework for hybrid H-control

    Author : Anna-Karin Christiansson; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Riccati equation; discrete-time; hold-states; H-control; weight functions; lifting; output feedback; hybrid systems; samled-data;

    Abstract : .... READ MORE

  2. 2. A Unified Framework for Mixed Continuous/Discrete-time H_inf-Control

    Author : Anna-Karin Christiansson; Chalmers University of Technology; []
    Keywords : Riccati equation; output feedback; reduced controller order; mixed continuous discrete-time systems; sampled-data; lifting; loop-shaping; weight functions; H_inf-control;

    Abstract : This thesis presents a unified and general state-space framework for mixed continuous/discrete-time H_inf-controller design. H_inf-design considers robust and optimal control of multivariable systems. READ MORE

  3. 3. A unified framework for mixed continuous/discrete-time H_infinity -control

    Author : Anna-Karin Christiansson; Bengt Lennartson; Pertti Mäkillä; Högskolan Väst; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; H_inf-control; output feedback; Riccati equation; mixed continuous discrete-time systems; sampled-data; lifting; reduced controller order; loop-shaping; weight functions; Automatic control; Reglerteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : .... READ MORE

  4. 4. Feedback Control of Robotic Friction Stir Welding

    Author : Jeroen De Backer; Gunnar Bolmsjö; Anna-Karin Christiansson; Jorge Dos Santos; Högskolan Väst; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Friction stir welding; Process automation; Temperature control; Force control; Deflection model; Robotics; Svetsning; FSW; processtyrning; temperaturstyrning; robot; utböjning; kraftstyrning; Industriell arbetsvetenskap; Industrial engineering; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : The Friction Stir Welding (FSW) process has been under constant developmentsince its invention, more than 20 years ago. Whereas most industrial applicationsuse a gantry machine to weld linear joints, there are applications which consistof complex three-dimensional joints, requiring more degrees of freedom fromthe machines. READ MORE

  5. 5. Instrumentation and estimation for high temperature control

    Author : Petter Hagqvist; Bengt Lennartson; Anna-Karin Christiansson; Mikael Sjödahl; Högskolan Väst; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Additive Manufacturing; Automation; Emissivity; Emissivity Compensated Spectral Pyrometry; Laser Metal Wire Deposition; Metal Deposition; Pyrometry; Resistance Feedback Control; Thermometry; Varying Emissivity; Manufacturing and materials engineering; Produktions- och materialteknik; Physics; Fysik;

    Abstract : Within a variety of industrially relevant high temperature production processes such as welding, heat treatment and metal deposition, the quality of the manufactured component is largely affected by how well parameters can be controlled during processing. These parameters might be, in the case of metal deposition, power input, material feed, or a parameter which is common for all of the aforementioned processes: material temperature. READ MORE