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Optimal periodic forcing of nonlinear chemical processes for performance improvements
Author(s) -
Chen ChienChong,
Hwang Chyi,
Yang Ray Y. K.
Publication year - 1994
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450720417
Subject(s) - forcing (mathematics) , optimal control , nonlinear system , control theory (sociology) , parametrization (atmospheric modeling) , nonlinear programming , process (computing) , mathematical optimization , computer science , state (computer science) , control (management) , chemical process , mathematics , engineering , algorithm , mathematical analysis , physics , quantum mechanics , artificial intelligence , chemical engineering , radiative transfer , operating system
Unsteady‐state periodic operations can improve the optimal steady‐state performance of nonlinear chemical processes. To examine if the optimal periodic operation is proper and to obtain the optimal forcing functions subject to various control and state constraints it is suggested in this paper to convert the problems into a form which is suitable for constrained nonlinear programming. The adopted numerical optimization method is based on employing the control parametrization technique and is thus capable of dealing with the problem of multiple input forcings and obtaining optimal forcing functions and/or parameters while subject to general constraints. Besides, it provides information about to what extent the process performance can be improved by adopting the optimal periodic control.