Title :
Output feedback stabilization and approximate and restricted tracking for a class of cascaded systems
Author :
Astolfi, Alessandro ; Kaliora, Georgia ; Jiang, Zhong-Ping
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. London, UK
Abstract :
In this note, we discuss the problems of output feedback stabilization for a class of cascaded systems and of (approximate and restricted) output regulation for general nonlinear systems. It is shown that (global) output feedback stabilization for a class of systems in feedforward form can be achieved with a dynamic feedback law, yielding bounded control, and relying on the introduction of a reduced-order observer. The above result, together with standard tools borrowed from the output regulator theory, is instrumental to construct dynamic control laws achieving (approximate) disturbance rejection and output tracking in the presence of (small) disturbance/reference signals generated by a known exosystem.
Keywords :
cascade systems; feedback; feedforward; nonlinear control systems; nonlinear dynamical systems; observers; reduced order systems; stability; tracking; approximate disturbance rejection; approximate tracking; bounded control; cascaded systems; dynamic control laws; dynamic feedback law; feedforward; general nonlinear systems; output feedback stabilization; output regulation; output regulator theory; output tracking; reduced-order observer; restricted tracking; Adaptive control; Adaptive systems; Automatic control; Control systems; Error correction; Output feedback; Programmable control; Rivers; Tuning; Yield estimation; Cascaded systems; output feedback; output regulation;
Journal_Title :
Automatic Control, IEEE Transactions on
DOI :
10.1109/TAC.2005.854626