Results 11 to 20 of about 328 (44)
Sliding mode observers and observability singularity in chaotic synchronization
Mathematical Problems in Engineering, Volume 2004, Issue 1, Page 11-31, 2004., 2004 We present a new secured data transmission based on a chaotic synchronization and observability singularity. For this, we adopt an approach based on an inclusion of the message in the system structure and we use a sliding mode observer for system with unknown input in order to recover the information.
L. Boutat-Baddas +3 more
wiley +1 more source
Integral observability operators of nonlinear dynamical systems
International Journal of Mathematics and Mathematical Sciences, Volume 2003, Issue 55, Page 3519-3538, 2003., 2003 In terms of functional dependence, the description of observable functions in nonlinear dynamical systems, which are analytic with respect to phase variables, is obtained. For processing of measurements, integral operators are used, which provide certain noise stability of operation of phase state reconstruction.
Yury V. Zaika
wiley +1 more source
A hyperbolic system and the cost of null controllability for the Stokes system [PDF]
, 2014 This paper is devoted to study the cost of the null controllability for the Stokes system. Using the control transmutation method we show that the cost of driving the Stokes system to rest at time T is of order e^C/T when T -->0^+,i.e., the same order as
Chaves-Silva, F. W.
core +5 more sources
Interval estimates of functionals in time‐delay systems with uncertainty
International Journal of Mathematics and Mathematical Sciences, Volume 2003, Issue 56, Page 3573-3590, 2003., 2003 We consider a linear dynamical system with delay and uncertainty in initial data and movement and measurement equations. We present an algorithm of estimating an interval of possible values of functionals on solutions. We construct suboptimal weight functions in integral observation operators to minimize a sure estimation.
Yury V. Zaika
wiley +1 more source
Interior point control and observation for the wave equation
Abstract and Applied Analysis, Volume 1, Issue 2, Page 219-236, 1996., 1996 This paper is concerned with the approximate and exact controllability properties of the wave equation with interior point controls entering via the concentrated force, the velocity of the displacement and the moment. The emphasis is given to the moving point controls and their dual observations whose advantages and disadvantages, versus the static ...
A. Y. Khapalov
wiley +1 more source
Null controllability for a degenerate population model in divergence form via Carleman estimates
Advances in Nonlinear Analysis, 2019 In this paper we consider a degenerate population equation in divergence form depending on time, on age and on space and we prove a related null controllability result via Carleman estimates.
Fragnelli Genni
doaj +1 more source
Advances in Nonlinear Analysis, 2017 We establish Carleman estimates for singular/degenerate parabolic Dirichlet problems with degeneracy and singularity occurring in the interior of the spatial domain.
Fragnelli Genni, Mugnai Dimitri
doaj +1 more source
, 2016 This paper deals with a Luenberger Observer structure which is devoted to the identification of state variables of a Linear Time Invariant (LTI) system.
Paolo Mercorelli
semanticscholar +1 more source
Generic observability of dynamical systems
Documenta Mathematica, 2007 Received: January 18, 2005 Revised: July 3, 2007 Communicated by Ulf Rehmann Abstract. We deal with a ertain observation mapping de ned by means of weighted measurments on a dynami al system and give ne essary and su ient onditions, under whi h this ...
Esfandiar Nava Yazdani
semanticscholar +1 more source
Moving and oblique observations of beams and plates [PDF]
, 2019 We study the observability of the one-dimensional Schr{\"o}dinger equation and of the beam and plate equations by moving or oblique observations. Applying different versions and adaptations of Ingham's theorem on nonharmonic Fourier series, we obtain ...
Jaming, Philippe, Komornik, Vilmos
core +2 more sources