Banafsheh Yeganegi - Department of Computer and Electrical Engineering Babol Noushirvani University of Technology Babol, Iran
a Ranjbar N. - Department of Computer and Electrical Engineering Babol Noushirvani University of Technology Babol, Iran
Jalil Sadati - Department of Computer and Electrical Engineering Babol Noushirvani University of Technology Babol, Iran

This paper presents an observer based control scheme to control chaos in a class of nonlinear systems in the presence of external disturbances. In order to control chaos, a sliding mode control is chosen as the control technique. The controller requires a measured signal and its time derivative which is built with the aid of super-twisting differentiator. This technique is of a sensor-less strategy to eliminate the need for extra sensors. The technique is shown to reduce complexity and the measurement noise. The effectiveness of the proposed control scheme, consisting of a sliding mode for control and super-twisting algorithm for differentiation is illustrated through simulation.

chaos; modified Duffing system; sliding mode control; super-twisting differntation