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Quan, Quan; Lin, Hai; Cai, Kai-Yuan

Output feedback tracking control by additive state decomposition for a class of uncertain systems. (English) Zbl 1290.93078

Int. J. Syst. Sci., Princ. Appl. Syst. Integr. 45, No. 9, 1799-1813 (2014).
Summary: Besides parametric uncertainties and disturbances, unmodelled dynamics and time delay at the input are often present in practical systems, and cannot always be ignored. This paper aims to solve the problem of output feedback tracking control for a class of nonlinear uncertain systems subject to unmodelled high-frequency gains and time delay in the input. By additive state decomposition, the uncertain system is transformed to an uncertainty-free system, in which the uncertainties, disturbances and effects of unmodelled dynamics along with time delay are lumped into a new disturbance at the output. Subsequently, additive state decomposition is used to decompose the transformed system to simplify the tracking controller design. The proposed control scheme is applied to three benchmark examples to demonstrate its effectiveness.

Cited in 3 Documents

MSC:

93B52 Feedback control
93C41 Control/observation systems with incomplete information
93C10 Nonlinear systems in control theory
93B17 Transformations
93C73 Perturbations in control/observation systems

Keywords:

additive state decomposition; tracking; input delay; unmodelled dynamics; output feedback; nonlinear systems
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