Numerical analysis of spatio-temporal chaos in specially extended systems and research on chaotic electrodissolution of metals

We report results (numerical and experimental) indicating control of the ob served oscillatory dynamics in an electrochemical system using external for cing and variable feedback. Under the influence of external forcing it was observed that the chaotic dynamics could be converted to periodic states. M oreover, regular states with different periodicities could be stabilized. U sing a continuous delayed feedback control strategy chaotic oscillations ar e suppressed via stabilization of fixed point steady states and/or periodic dynamics. Finally we report numerical results indicating control of spatio temporal chaos observed in a spatially extended chemical system. In one spa tial dimension the model dynamics under appropiate parameter conditions exh ibit chemical turbulence which is suppressed using feedback and forcing tec hniques.