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Robust output regulation for nonlinear chemical processes with unmeasurable disturbances
Author(s) -
Wu Wei,
Chou YiShyong
Publication year - 1995
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690411207
Subject(s) - control theory (sociology) , nonlinear system , internal model , linearization , controller (irrigation) , lyapunov function , chemical reactor , continuous stirred tank reactor , offset (computer science) , nonlinear control , attenuation , feedback linearization , control engineering , engineering , computer science , control (management) , physics , quantum mechanics , artificial intelligence , optics , chemical engineering , agronomy , biology , programming language
It becomes a problem when the input‐output feedback linearization of nonlinear processes presents unmeasurable disturbances that appear linear in the model and are not in the span of control input space. The prcsented hybrid nonlinear controller, which consists of a nonlinear static state fredback with a series of a adjustable parameters and an internal model, can achieve disturbance attenuation and offset‐free performance. The major advantage of the proposed control system design is to reject disturbance without producing a vigorous control action. A simple estimation method of computing a single parameter that replaces a series of adjustable parameters of the controller is developed. The proposed estimation strategy of computing a single parameter is based on the Lyapunov stability theory. These control schemes are illustrated by an example of a chemical reactor to obtain satisfactory control.