(371o) Adaptive Fuzzy Controller for Uncertain Nonlinear Systems with unmeasured states

In this paper an adaptive Fuzzy dynamic surface controller for two series of CSTRs with nonlinear dynamic in presence of input saturation is investigated. Dynamic model of these reactors is unknown and a FF has been used for the estimating of unknown system dynamics. An observer is designed to estimate the unmeasured concentration of the first reactor and the backstepping technique has been applied for controller design. The proposed controller is singularity free. It is proven that all closed loop signals are semi-globally uniformly ultimately bounded (SGUUB) and the output concentration tracking error of second reactor converges to a small neighborhood of the origin by choosing the design parameters appropriately.