Robust output feedback tracking for a class of uncertain nonlinear systems
ZHANG Kan-jian
FENG Chun-bo
FEI Shu-min
Abstract：An output feedback tracking strategy for a class of uncertain nonlinear systems in strict feedback form is proposed. The uncertain nonlinearities of the system do not need to obey the linear growth conditions. A high-gain differential observer is used to estimate the derivatives of the tracking error. Instead of these signals themselves, their signs are used in a special variable structure observer. The controller is then designed via backstepping procedure. It can guarantee the boundedness of all signals in the whole closed-loop system. The tracking error can be limited in any desirable range.
Keywords：robust controluncertain nonlinear systemoutput feedbackvariable structure observerbackstepping procedure
Publication Date：2003-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 173-179 )