Search for dissertations about: "friction"

Showing result 1 - 5 of 631 swedish dissertations containing the word friction.

  1. 1. Control Systems with Friction

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

    Author : Henrik Olsson; Lunds universitet.; Lund University.; [1996]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; control engineering; Automatiska system; Automation; robotics; Friction Observer; Friction Compensation; Describing Function Analysis; Limit Cycles; Friction Modeling; Friction; Control Systems; robotteknik; reglerteknik;

    Abstract : Popular Abstract in Swedish Avhandlingen behandlar reglertekniska problem orsakade av friktion. Tre aspekter behandlas: modellering, analys av självsvängningar orsakade av friktion och friktionskompensering. En ny relativt enkel matematisk modell för friktion presenteras och studeras. READ MORE

  2. 2. Gear tribology : friction and surface topography

    University dissertation from Göteborg : Chalmers university of technology

    Author : Li Xiao; Högskolan i Halmstad.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY; TEKNIKVETENSKAP; Friction; Surface topography; Toughness; Lay; Gears; Power transmission; surface topography; lay; toughness; power transmission; wfficiency; gears; friction;

    Abstract : The quest for energy efficiency leads to the development of highly efficient power transmissions for vehicles. Gears are some of the most rugged and durable torque transmitters among machine elements. Friction between sliding surfaces at gear teeth is one major source of power loss. READ MORE

  3. 3. Surfaces Designed for High and Low Friction

    University dissertation from Uppsala : Institutionen för teknikvetenskaper

    Author : Ulrika Pettersson; Uppsala universitet.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; tribology; friction; surface texture; surface design; low friction; high friction; boundary lubrication; DLC; embossing; Materialvetenskap; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap;

    Abstract : This thesis comprises tribological studies of extremely well-defined surfaces of different designs. Both low-friction and high-friction surfaces were manufactured and experimentally evaluated.In the low-friction studies, lithography and anisotropic etching of silicon was first used as a texturing technique. READ MORE

  4. 4. Tactile Perception Role of Friction and Texture

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Lisa Skedung; KTH.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; human skin; tactile friction; finger friction; skin friction; skin tribology; biotribology; tactile perception; haptic perception; psychophysics; haptics; surface roughness; surface texture; contact area; nanostructure; model surfaces; surface wrinkling; printing paper; tissue paper; magnitude estimation; multidimensional scaling; tactile threshold; psychophysical relations; smoothness; coolness; coarseness; softness; force sensor; skin lipids; topical formulations; skin creams; taktil friktion; fingerfriktion; hudfriktion; hudtribologi; biotribologi; taktil perception; psykofysik; haptik; ytråhet; ytstruktur; ytveckning; nanostruktur; kontaktarea; modellytor; friktionskoefficient; kraftmätare; bestruket papper; obestruket papper; tryckpapper; mjukpapper; multidimensionell skalning; magnitud estimation; taktilt tröskelvärde; lenhet; mjukhet; svalhet; strävhet; hudlipider; topikala beredningar; hudkräm;

    Abstract : Tactile perception is considered an important contributor to the overall consumer experience of a product. However, what physical properties that create the specifics of tactile perception, are still not completely understood. READ MORE

  5. 5. Surface Force and Friction effects of adsorbed layers and surface topography

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Xiaoyan Liu; KTH.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Friction; nanotribology; surface forces; diblock copolymer; lipid; QCM-D; AFM; optical reflectometry; neutron reflectivity; X-ray reflectivity; micro-patterned surface; Kemi; Chemistry;

    Abstract : Interfacial features of polymers are a complex, fascinating topic, and industrially very important. There is clearly a need to understand interactions between polymer layers as they can be used for controlling surface properties, colloidal stability and lubrication. The aim of my Ph. READ MORE