In this paper, an observer-based adaptive control
scheme is proposed for a class of uncertain nonlinear
systems, which are subjected to the norm-bounded
system parameter variation uncertainties and the
nonlinear sector-like bounded system input functions.
The proposed observer-based adaptive control method
can force the system outputs follow the desired
reference model outputs satisfactorily and ensure all the
signals bounded in the controlled system. Finally, some
simulation results are given to illustrate the control
effectiveness of the proposed control scheme.