Eur. Phys. J. B 58, 331-336 (2007)
https://doi.org/10.1140/epjb/e2007-00220-6

Eliminating spiral waves and spatiotemporal chaos using feedback signal

¹ Department of Physics, Hebei Normal University, Shijiazhuang, 050016, P.R. China
² Institute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beijing, 100088, P.R. China

Corresponding author: ^a g-y-y1975@sohu.com

Received: 21 January 2007
Revised: 7 July 2007
Published online: 15 August 2007

Abstract

Spiral waves and spatiotemporal chaos are sometimes harmful and should be controlled. In this letter we present a feedback scheme to eliminate them. We first collect feedback signals at a certain time t₀. Then wait for the system at the excitable position to enter the recovering state. When the time comes, the feedback signals are added. This scheme has two advantages. Firstly, the tip can be eliminated together with the body of spiral wave. Secondly, the injected feedback signals can be very weak and the duration can be very short so that the original system is nearly not to be affected, which is important for practical applications.