| Abstract: | In this paper, a close-loop feedback control is imposed locally on the Fitzhugh-Nagumo (FHN) system to suppress the stable spirals and spatiotemporal chaos according to the principle of self-adaptive coupling interaction. The simulation results show that an expanding target wave is stimulated by the spiral waves under dynamic control period when a local area of 5×5 grids is controlled, or the spiral tip is driven to the board of the system. It is also found that the
spatiotemporal chaos can be suppressed to get a stable homogeneous state
within 50 time units as two local grids are controlled mutually. The
mechanism of the scheme is briefly discussed. |
