Open AccessRobust Output Feedback of Minimum Phase Nonlinear Systems
Author(s) -
Emrod Elisante
Publication year - 2007
Publication title -
tanzania journal of engineering and technology/tanzania journal of engeering and technology
Language(s) - English
Resource type - Journals
eISSN - 1821-536X
pISSN - 2619-8789
DOI - 10.52339/tjet.v30i2.401
Subject(s) - control theory (sociology) , multivariable calculus , minimum phase , nonlinear system , observer (physics) , controller (irrigation) , robust control , robustness (evolution) , output feedback , computer science , nonlinear control , simple (philosophy) , internal model , control engineering , phase (matter) , engineering , control (management) , physics , artificial intelligence , chemistry , agronomy , quantum mechanics , biology , biochemistry , philosophy , epistemology , gene
A robust output feedback controller is synthesized for minimum phase multivariable nonlinear systems based on thedifferential geometry approach. Using the internal model control structure within the input-output (I/O) linearizationframework, the controller is combined with a closed-loop observer to estimate transformed states in the outer-loop. It isshown that the controller-observer combination achieves robust tracking and estimation using simple tuningparameters. The effectiveness of the proposed system is illustrated by a simulation example for control of concentrationin a chemical reactor.