Anticontrol of chaos in continuous-time systems via time-delay feedback

In this paper, a systematic design approach based on time-delay feedback is developed for anticontrol of chaos in a continuous-time system. This antic ontrol method can drive a finite-dimensional, continuous-time, autonomous s ystem from nonchaotic to chaotic, and can also enhance the existing chaos o f an originally chaotic system. Asymptotic analysis is used to establish an approximate relationship between a time-delay differential equation and a discrete map. Anticontrol of chaos is then accomplished based on this relat ionship and the differential-geometry control theory. Several examples are given to verify the effectiveness of the methodology and to illustrate the systematic design procedure. (C) 2000 American Institute of Physics. [S1054 -1500(00)00904-6].