Adaptive Tracking Control of Periodic Signals for a Class of Uncertain Nonlinear Systems

The paper considers the problem of tracking of periodic signals generated by a nonlinear system for a class of uncertain nonlinear systems.The uncertainty of the system is not parameterizable.An adaptive control law for the tracking is presented.The control law can guarantee that all the signals in the closed loop system are bounded and that the tracking error converges to zero.The tracking control laws in the previous related studies only guarantee that the integral of square of the tracking error over a period converges to zero.