Sökning: "Ride"

Visar resultat 11 - 15 av 98 avhandlingar innehållade ordet Ride.

  1. 11. Voltage sag ride-through of AC drives : control and analysis

    Författare :Kai Pietiläinen; Hans-Peter Nee; Olli Pyrhönen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronic measurement and instrumentation; Elektronisk mät- och apparatteknik;

    Sammanfattning : This thesis focuses on controller design and analysis for induction motor (IM) drives, flux control for electrically excited synchronous motors with damper windings (EESMs), and to enhance voltage sag ride-through ability and analysis for a wind turbine application with a full-power grid-connected active rectifier. The goal is to be able to use the existing equipment, without altering the hardware. LÄS MER

  3. 12. Difficulties to Read and Write Under Lateral Vibration Exposure : Contextual Studies Of Train Passengers Ride Comfort

    Författare :Jerker Sundström; Shafiquzzaman Khan; Neil J. Mansfield; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lateral vibrations; passenger activities; reading; writing; sitting posture; frequency weighting; rated difficulty; field study; laboratory study; transient vibrations; stationary vibrations.; Vehicle engineering; Farkostteknik;

    Sammanfattning : Many people use the train both as a daily means of transport as well as a working place to carry out activities such as reading or writing. There are, however, several important factors in this environment that will hamper good performance of such activities. LÄS MER

  4. 13. From stem cells to neurons : a BMPy ride

    Författare :Therese Andersson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Pinpointing the mechanisms behind the formation of the vertebrate development has been an intriguing and challenging task for researchers for several decades. In the 1980s two independent groups managed to isolate cells from the inner cell mass of a mouse blastocyst and to culture and expand them in vitro, while maintaining their pluripotency. LÄS MER

  5. 14. Voltage sag ride-through control of induction motor drives

    Författare :Kai Pietiläinen; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 15. 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