Adaptive Robust Stabilization of Output Feedback Systems With Application to Chua's Circuit

Abstract

This brief studies the adaptive robust stabilization problem for nonlinear systems in output feedback form with the high-frequency gain sign unknown. The problem is solved by integrating the robust control method and the Nussbaum gain technique. Also, we show that the celebrated Chua's circuit is a nonlinear system in output feedback form, and apply our approach to design a control law to achieve global stability of the closed-loop system in the presence of uncertain parameters and unknown high-frequency gain sign