Self-tuning controllers for nonlinear systems

Abstract Two new self-tuning control (STC) strategies for nonlinear control problems are proposed. These strageties are applicable to a broad class of nonlinear single-input, single-output systems which can include arbitrary nonlinear functions of the output and the old inputs as well as the products of these functions and any power of the most recent input. Simulation results for a stirred-tank chemical reactor demonstrate that the new nonlinear STC strategy provides significant improvement over conventional STC's based on linear models