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Parallel nonlinear decoupling for process control — A NARMAX approach

✍ Scribed by B.A. Foss; T.A. Johansen

Book ID
104270080
Publisher
Elsevier Science
Year
1992
Weight
562 KB
Volume
17
Category
Article
ISSN
0066-4138

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✦ Synopsis

The contribution of this paper is twofold. First, we focus on the application ofa particular NARMAX (nonlinear ARMAX) model representation based on local models for adaptive decoupling. Second, in order to improve the robustness of the adaptive control algorithm we introduce a diagonal PI-controller in parallel with the adaptive decoupler, These controllers are separated in the frequency domain, such that the decoupler and PI-controller takes care of control actions at higher and lower frequencies, respectively. The parallel control structure supports incremental control design, in the sense that improved process knowledge is used to successively upgrade control performance. The concept is illustrated by a semi-realistic simulation example.

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