in this paper, we try to use modeling based on singular perturbation theory, in order to control satellite attitude during the wide rolling angle maneuvering through nonlinear h∞ control strategy. differential equations describing dynamics of the satellite are presented first, and by choosing the appropriate dynamic model for actuators and based on the standard singular perturbation model, the ...

In this paper, vibration control is performed by using piezoelectric elements which are one of the smart actuator. An operator-based robust nonlinear control system by using robust right coprime factorization approach and a nonliliner property of hysteresis model is proposed. Considering the hysteresis in the piezoelectric actuator, assuming that an aircraft vertical tail is forced vibration mo...

of counterpropagating pulses in random media Robert Fischer, Dragomir N. Neshev, Solomon M. Saltiel, Andrey A. Sukhorukov, Wieslaw Krolikowski, and Yuri S. Kivshar Nonliner Physics Centre and Laser Physics Centre, Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital ...

The effort to make efficient Retinex engines motivated the research reported in this paper. In most Retinex-type algorithms the computational engine is some (possibly nonlinear) variant of a large support low-pass filter. The presented work relies on the fact that recursive (2D IIR) filtering is an efficient method to implement such large support linear space invariant filters. We propose a gen...

A shock driven material interface between two fluids of different density is unstable. This instability is known as Richtmyer-Meshkov (RM) instability. In this paper, we present a quantitative nonlinear theory of compressible Richtmyer-Meshkov instability in two dimensions. Our nonlinear theory contains no free parameter and provides analytical predictions for the overall growth rate, as well a...