Controlling oscillation amplitudes via feedback

This paper studies feedback control of limit cycle amplitudes in nonlinear systems. A graphical approach to bifurcation control is first briefly intro duced, followed by the derivation of a nonlinear control law. Then, a suita ble implementation of the design is developed via an approximation of the t ime-derivative term in the nonlinear state feedback controller. A classical model is finally simulated for illustration of the proposed control method .