Sökning: "Keywords: system dynamics"

Visar resultat 1 - 5 av 18 avhandlingar innehållade orden Keywords: system dynamics.

  1. 1. Carbody and Passengers in Rail Vehicle Dynamics

    Författare :Pelle Carlbom; KTH; []
    Nyckelord :Rail-Vehicle Dynamics; Human-Body Dynamics; Ride Comfort; Structural Dynamics;

    Sammanfattning : The carbody plays an important role in rail vehicle dynamics.This thesis aims atdeveloping validated modelling methods tostudy its dynamics, how it is excited on trackand how itinteracts with the passengers. The primary interest is ridecomfort,considering vibrations up to 20 Hz. LÄS MER

  3. 2. Design and evaluation of stationary polymer electrolyte fuel cell systems

    Författare :Cecilia Wallmark; KTH; []
    Nyckelord :Small-scale; stationary; fuel cell system; polymer electrolyte fuel cell; PEFC system; reformer; thermodynamic modelling; pinch technology; exergy analyses; system configuration; test facility; experiments; application; simulation; installation; ener;

    Sammanfattning : The objectives of this doctoral thesis are to give a basisincluding methods for the development of stationary polymerelectrolyte fuel cell (PEFC) systems for combined heat andpower production. Moreover, the objectives include identifyingprerequisites, requirements and possibilities for PEFC systemsproducing heat and power for buildings in Sweden. LÄS MER

  4. 3. The Dynamics of Firm and Industry Growth : The Swedish Computing and Communications Industry

    Författare :Dan Johansson; KTH; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; The experimentally organised economy; Competence blocs; Industrial Dynamics; Industrial Transformation; Firm age; Small-firm growth; Turnover of firms; Computing and Communications industry; IT industry; Institutions;

    Sammanfattning : The growth of the Swedish Computing and Communicationsindustry is studied in this thesis. Growth is seen as a dynamicprocess moved by the entry, expansion, contraction and exit offirms.The analysis is founded on the theory of the ExperimentallyOrganised Economy, which views the economy as an experimentalprocess. LÄS MER

  5. 4. Synchronous Voltage Reversal Control of Thyristor Controlled Series Capacitor

    Författare :Lennart Ängquist; KTH; []
    Nyckelord :ThyristorControlled Series Capacitor; TCSC; FACTS; reactive power compensation; boost control; phasor estimation; Quantitative Feedback Theory; subsynchronous resonance; SSR;

    Sammanfattning : Series compensation of transmission lines is an effectiveand cheap method of improving the power transmission systemperformance. Series capacitors virtually reduces the length ofthe line making it easier to keep all parts of the power systemrunning in synchronism and to maintain a constant voltage levelthroughout the system. LÄS MER

  7. 5. Valve-less diffuser micropumps

    Författare :Anders Olsson; KTH; []
    Nyckelord :;

    Sammanfattning : Today there is growing interest in research on microfluidicsystems, e.g., for chemical analysis systems and microdosagesystems. One of the basic components in microfluidic systems ismicropumps. LÄS MER