A robust control scheme for synchronizing fractional order disturbed chaotic systems with uncertainty and time-varying delay

In this paper, a new method is presented for synchronization between two fractional order delayed chaotic systems, while there uncertainty on the models and external disturbances enter systems at same time. The considered delay in system unspecified varied with time, of course it present different forms master slave systems. External master–slave finite manner, albeit an undetermined upper bound, nonlinear functions goal synchronizing particular class achieved through combination adaptive sliding mode techniques. has been used to cover effects uncertainties functions, applied ensure stability proposed technique, disturbance bound estimation overcoming variability. A practical example innovative simulated MATLAB environment obtained results confirm optimal efficiency method.