CONTROL OF CHAOS BY NONFEEDBACK METHODS IN A SIMPLE ELECTRONIC-CIRCUIT SYSTEM AND THE FITZHUGH-NAGUMO EQUATION

Various control algorithms have been proposed in recent years to contr ol chaotic systems. These methods are broadly classified into feedback and nonfeedback methods. In this paper, we make a critical analysis o f nonfeedback methods such as (i) addition of constant bias, (ii) addi tion of second periodic force, (iii) addition of weak periodic pulse, and (iv) entrainment control. We apply these methods to a simple elect ronic circuit, namely, the Murali-Lakshmanan-Chua circuit system and F itzHugh-Nagumo equation. We make a comparative study of the various fe atures associated with the algorithms. (C) 1997 Elsevier Science Ltd.