Feedback control of wave propagation patterns in excitable media

2003 ◽  
Author(s):  
Florin Chirila
Keyword(s):  
Wave Propagation ◽  
Feedback Control ◽  
Excitable Media

Electro-magneto wave propagation analysis of viscoelastic sandwich nanoplates considering surface effects

2016 ◽  
Vol 231 (2) ◽  
pp. 387-403 ◽  
Author(s):  
A Ghorbanpour Arani ◽  
M Jamali ◽  
AH Ghorbanpour-Arani ◽  
R Kolahchi ◽  
M Mosayyebi
Keyword(s):  
Zinc Oxide ◽  
Wave Propagation ◽  
Feedback Control ◽  
Graphene Sheet ◽  
Surface Effects ◽  
Structural Damping ◽  
Sensors And Actuators ◽  
Velocity Feedback ◽  
Oxide Layers ◽  
Propagation Analysis

The original formulation of the quasi-3D sinusoidal shear deformation plate theory (SSDPT) is here extended to the wave propagation analysis of viscoelastic sandwich nanoplates considering surface effects. The sandwich structure contains a single layered graphene sheet as core integrated with zinc oxide layers as sensors and actuators. The single layered graphene sheet and zinc oxide layers are subjected, respectively, to 2D magnetic and 3D electric fields. Structural damping and surface effects are assumed using Kelvin–Voigt and Gurtin–Murdoch theories, respectively. The system is rested on an elastic medium which is simulated with a novel model namely as orthotropic visco-Pasternak foundation. An exact solution is applied in order to obtain the frequency, cut-off and escape frequencies. A displacement and velocity feedback control algorithm is applied for the active control of the frequency through a closed-loop control with bonded distributed zinc oxide sensors and actuators. The detailed parametric study is conducted, focusing on the combined effects of the nonlocal parameter, magnetic field, viscoelastic foundation, surface stress, applied voltage, velocity feedback control gain and structural damping on the wave propagation behavior of nanostructure. Results depict that with increasing the structural damping coefficient, frequency significantly decreases.

Asymptotic wave propagation in excitable media

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
Olivier Bernus ◽  
Edward Vigmond
Keyword(s):  
Wave Propagation ◽  
Excitable Media

A Simple Three-States Cellular Automaton for Modelling Excitable Media

1998 ◽  
Vol 12 (05) ◽  
pp. 601-607 ◽  
Author(s):  
M. Andrecut
Keyword(s):  
Wave Propagation ◽  
Partial Differential Equations ◽  
Cellular Automata ◽  
Differential Equations ◽  
Cellular Automaton ◽  
Cellular Automaton Model ◽  
Excitable Media ◽  
Self Organization ◽  
Partial Differential ◽  
Bz Reaction

Wave propagation in excitable media provides an important example of spatiotemporal self-organization. The Belousov–Zhabotinsky (BZ) reaction and the impulse propagation along nerve axons are two well-known examples of this phenomenon. Excitable media have been modelled by continuous partial differential equations and by discrete cellular automata. Here we describe a simple three-states cellular automaton model based on the properties of excitation and recovery that are essential to excitable media. Our model is able to reproduce the dynamics of patterns observed in excitable media.

Wave Propagation in Spatially Distributed Excitable Media

2003 ◽  
Vol 63 (2) ◽  
pp. 485-509 ◽  
Author(s):  
Jianbo Yang ◽  
John H. Merkin ◽  
Serafim Kalliadasis ◽  
Stephen K. Scott
Keyword(s):  
Wave Propagation ◽  
Excitable Media ◽  
Spatially Distributed

scholarly journals Diffusion and wave propagation in cellular automaton models of excitable media

1992 ◽  
Vol 55 (3-4) ◽  
pp. 309-327 ◽  
Author(s):  
Jörg R. Weimar ◽  
John J. Tyson ◽  
Layne T. Watson
Keyword(s):  
Wave Propagation ◽  
Cellular Automaton ◽  
Excitable Media

DEFECT-INDUCED PROPAGATION IN EXCITABLE MEDIA

2003 ◽  
Vol 13 (10) ◽  
pp. 3125-3133 ◽  
Author(s):  
ZHIGANG ZHENG ◽  
MICHAEL C. CROSS
Keyword(s):  
Wave Propagation ◽  
Coupling Strength ◽  
Excitable Media ◽  
Dynamical Transition ◽  
Wave Dynamics ◽  
Propagation Failure ◽  
Local Wave

Wave dynamics in the coupled FitzHugh–Nagumo oscillators with pacemaker defects is studied. It is found that with increasing the coupling strength, the lattice experiences a dynamical transition from a local wave to the global propagation. For large enough coupling, a transition from global wave propagation to the propagation failure can be observed. Noise-enhanced wave propagation in the propagation-failure regime is revealed.

Resonance Induced Pacemakers: A New Class of Organizing Centers for Wave Propagation in Excitable Media

2001 ◽  
Vol 87 (23) ◽  
Author(s):  
P. Parmananda ◽  
Hitoshi Mahara ◽  
Takashi Amemiya ◽  
Tomohiko Yamaguchi
Keyword(s):  
Wave Propagation ◽  
Excitable Media ◽  
New Class
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