Search for dissertations about: "Orbital"

Showing result 1 - 5 of 151 swedish dissertations containing the word Orbital.

  1. 1. Contributions to motion planning and orbital stabilization case studies: Furuta pendulum swing up, inertia wheel oscillations and biped robot walking

    University dissertation from Umeå : Umeå university

    Author : Pedro Xavier Miranda La Hera; Anton Shiriaev; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Under-actuated Systems; Orbital Exponential Stability; Motion Planning; Virtual Constraints; Walking robots; TECHNOLOGY Information technology Automatic control; TEKNIKVETENSKAP Informationsteknik Reglerteknik;

    Abstract : Generating and stabilizing periodic motions in nonlinear systems is a challenging task. In the control system community this topic is also known as limit cycle control. In recent years a framework known as Virtual Holonomic Constraints (VHC) has been developed as one of the solutions to this problem. READ MORE

  2. 2. Orbital floor fractures - aspects of diagnostic methods, treatment and sequelae

    University dissertation from Göteborg : Göteborg University

    Author : Lena Folkestad; Göteborgs universitet.; Gothenburg University.; [2006]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; orbital floor fracture: sequelae; patients experience; diplopia; entrapment; vertical eye motility; vertical electro-oculography vEOG ;

    Abstract : Despite surgical intervention, orbital floor fractures are associated with risks of persisting sensibility disturbances, enophthalmos and diplopia. Cheek asymmetry and trismus may result when the zygoma is dislocated. In evaluating the surgical results patients’ experiences of the outcomes have to be investigated. READ MORE

  3. 3. Development and application of Muffin-Tin Orbital based Green’s function techniques to systems with magnetic and chemical disorder

    University dissertation from Institutionen för fysik, kemi och biologi

    Author : Andreas Kissavos; Igor Abrikosov; Hubert Ebert; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mathematical physics; Theoretical Physics; Muffin-Tin Orbital method; Calculations; Magnetism; Lloyd’s formula; NATURAL SCIENCES Physics Other physics Mathematical physics; NATURVETENSKAP Fysik Övrig fysik Matematisk fysik;

    Abstract : Accurate electronic structure calculations are becoming more and more important because of the increasing need for information about systems which are hard to perform experiments on. Databases compiled from theoretical results are also being used more than ever for applications, and the reliability of the theoretical methods are of utmost importance. READ MORE

  4. 4. Multi-species systems in optical lattices From orbital physics in excited bands to effects of disorder

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Fernanda Pinheiro; Jonas Larsson; Jani-Petri Martikainen; Ehud Altman; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical Physics; teoretisk fysik;

    Abstract : In this thesis we explore different aspects of the physics of multi-species atomic systems in optical lattices. In the first part we will study cold gases in the first and second excited bands of optical lattices - the p and d bands. READ MORE

  5. 5. Principles for planning and analyzing motions of underactuated mechanical systems and redundant manipulators

    University dissertation from Umeå : Umeå universitet, Institutionen för tillämpad fysik och elektronik

    Author : Uwe Mettin; Anton Shiriaev; Alin Albu-Schäffer; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Motion Planning; Underactuated Mechanical Systems; Redundant Manipulators; Virtual Holonomic Constraints; Orbital Stabilization; Human Movement; Walking Robots; Hydraulic Manipulators; TECHNOLOGY Electrical engineering; electronics and photonics Electrical engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektroteknik; Automatic Control; reglerteknik;

    Abstract : Motion planning and control synthesis are challenging problems for underactuated mechanical systems due to the presence of passive (non-actuated) degrees of freedom. For those systems that are additionally not feedback linearizable and with unstable internal dynamics there are no generic methods for planning trajectories and their feedback stabilization. READ MORE