Search for dissertations about: "Anna Christiansson"

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

  2. 1. An inductive gap measurement method for square butt joints

    Author : Edvard Svenman; Anna-Karin Christiansson; Anna Runnemalm; Johan Carlsson; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Eddy current; Seam tracking; Measurement; Laser beam welding; gap geometry; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : A recent method in aero engine production is to fabricate components from smaller pieces, rather than machining them from large castings. This has made laser beam welding popular, offering high precision with low heat input and distortion, but also high productivity. READ MORE

  4. 2. Synthesis of highly brominated diphenyl ethers and aspects on photolysis and indoor spreading

    Author : Anna Christiansson; Åke Bergman; Eva Jakobsson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Miljökemi; Environmental Chemistry; miljökemi;

    Abstract : Adding chemicals to materials to decrease flammability can be dated back to as early as 450 BC when the Egyptians used alum to reduce flammability of wood. Almost 2500 years later brominated flame retardants (BFRs) are used to prevent ignition of textiles, electronics and polymers. READ MORE

  5. 3. A general framework for hybrid H-control

    Author : Anna-Karin Christiansson; Chalmers tekniska högskola; []
    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

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

    Author : Anna-Karin Christiansson; Bengt Lennartson; Pertti Mäkillä; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 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

  7. 5. Feedback Control of Robotic Friction Stir Welding

    Author : Jeroen De Backer; Gunnar Bolmsjö; Anna-Karin Christiansson; Jorge Dos Santos; Högskolan Väst; []
    Keywords : 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