Faculty of Natural Sciences and Mathematics

Permanent URI for this communityhttps://repository.ukim.mk/handle/20.500.12188/16

Browse

Settings

End date: 2009Subject: search.filters.subject.Physics - General Physics

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Stabilization of unstable steady states by variable delay feedback control
    (IOP Publishing, 2008-05-27)
    ;
    Viktor Urumov
    We report on a dramatic improvement of the performance of the classical time-delayed autosynchronization method (TDAS) to control unstable steady states, by applying a time-varying delay in the TDAS control scheme in a form of a deterministic or stochastic delay-modulation in a fixed interval around a nominal value $T_0$. The successfulness of this variable delay feedback control (VDFC) is illustrated by a numerical control simulation of the Lorenz and R\"{o}ssler systems using three different types of time-delay modulations: a sawtooth wave, a sine wave, and a uniform random distribution. We perform a comparative analysis between the VDFC method and the standard TDAS method for a sawtooth-wave modulation by analytically determining the domains of control for the generic case of an unstable fixed point of focus type.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Einstein's mirror revisited
    (American Association of Physics Teachers (AAPT), 2007-01-19)
    ;
    We describe a simple geometrical derivation of the formula for reflection of light from a uniformly moving plane mirror directly from the postulates of special relativity.