CONTROLLING CHAOS IN ELECTRONIC-CIRCUITS

Chaotic oscillations in electronic circuits are rather an unwanted phe nomenon. We describe various control concepts the goal of which is to suppress chaos and to achieve a desired type of dynamic behaviour such as stable fixed point or a periodic orbit. The control concepts descr ibed here include: (i) system parameter variation; (ii) chaotic oscill ation absorber; (iii) entrainment; (iv) linear feedback control; (v) t ime-delayed feedback, (vi) methods for stabilizing unstable periodic o rbits: occasional proportional feedback and sampled input waveform met hods. Advantages and drawbacks of these methods are described. Control towards chaotic states having several potential applications is also considered.