Search for dissertations about: "Feed-back loop"

Showing result 1 - 5 of 10 swedish dissertations containing the words Feed-back loop.

2. 1. Nonaxisymmetric experimental modal analysis and control of resistive wall MHD in RFPs : System identification and feedback control for the reversed-field pinch

   Author : K Erik J Olofsson; Per Brunsell; Marco Ariola; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Magnetic confinement fusion; Reversed-field pinch; System identification; Magnetohydrodynamics; Modal analysis; Automatic control; Resistive wall modes;

   Abstract : The reversed-field pinch (RFP) is a device for magnetic confinement of fusion plasmas. The main objective of fusion plasma research is to realise cost-effective thermonuclear fusion power plants. The RFP is highly unstable as can be explained by the theory of magnetohydrodynamics (MHD). READ MORE

4. 2. Fixed-Feedback SISO Adaptive Control

   Author : Magnus Nilsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Two-Degrees-of-Freedom Control; Feedforward Control; Adaptive Control;

   Abstract : Adaptive control is an attractive method to solve control problemssince the tedious task of identifying process behavior to find asuitable design for the controller is taken care of by the adaptivecontroller itself. It may be difficult, however, to guaranteerobustness (in the sense of desired disturbance attenuation andstability margins) for traditional adaptive schemes since theircorresponding loop gain is time varying. READ MORE

5. 3. The impact of cormorant nesting colonies on plants and arthropods

   Author : Gundula S. Kolb; Peter Hambäck; Lenn Jerling; Post David; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; seabirds; cormorants; islands; nitrogen; phosphorus; plants; arthropods; δ15N; Baltic Sea; ecological stoichiometry; species richness; species composition; numeric response; Biology; Biologi; Plant Ecology; växtekologi;

   Abstract : Seabirds concentrate large amounts of marine nutrients on their nesting islands. This nutrient input can have large consequences for island food webs and community structure. The high nutrient load may also cause runoff into surrounding waters and affect marine communities. READ MORE

6. 4. Extending Opera - Artist-led Explorations in Operatic Practice through Interactivity and Electronics

   Author : Carl Unander-Scharin; Kristina Höök; Wendy Mackay; Stockholms konstnärliga högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Medieteknik; Opera; Performativa och mediala praktiker; med inriktning mot film och media koreografi opera scen; Performative and mediated practices; with specializations in choreography film and media opera performing arts; Media Technology;

   Abstract : How can we re-empower opera singers, extending their control over accompaniment and vocal expressivity? To answer this question, I have opened a novel design space, Extending Opera, consisting of interactive artist–operated tools to be used on-stage. The research has its methodological groundings in Research through Design (RtD) and Research through the Arts (RttA). READ MORE

7. 5. Leukotriene C4 synthase : studies on oligomerization and subcellular localization

   Author : Jesper Svartz; Mats Söderström; Sven Hammarström; Colin Funk; Linköpings universitet; []
   Keywords : MEDICINE; MEDICIN;

   Abstract : Leukotrienes (LTs) are polyunsaturated fatty acid derivatives formed by oxygenation of arachidonic acid via the 5-lipoxygenase (5-LO) pathway. Upon activation of inflammatory cells 5-LO is translocated to the nuclear envelope where it converts arachidonic acid to the unstable epoxide LTA4. READ MORE