Dynamics of Spiral Waves under Phase Feedback Control in a Belousov-Zhabotinsky Reaction

Feedback control of spiral waves by the phases of the spiral tip is investigated experimentally in a light-sensitive Belousov-Zhabotinsky reaction. The phases of rotation ([Formula presented]) and meandering ([Formula presented]) of the spiral tip are obtained in real time during experiments. It is found that, for both meandering and rigid rotating spirals, one can manipulate the spirals to move with any arbitrary paths by the feedback signals derived from [Formula presented]. Synchronization between meandering and rotation dynamics can be induced when both [Formula presented] and [Formula presented] are used simultaneously as control signals. Experimental findings are compared well with numerical simulations of the Oregonator model. © 2002 The American Physical Society.