ADAPTIVE-CONTROL OF CHAOS

We introduce an adaptive method for stabilizing the unstable periodic orbits embedded in a chaotic attractor. The control technique is based on a continuous correction of the dynamics with a forcing term driven by the local information extracted from the dynamics itself. The meth od easily controls systems in which more than one positive Lyapunov ex ponent is present and can be implemented even for experimental situati ons which are too fast for standard off-line control methods.