Control Quality Assessment for Processes With Asymmetric Properties and its Application to pH Reactor
Paweł Domański , Maciej Ławryńczuk
AbstractThe majority of processes in chemical industry is nonlinear. However we often take advantage of linear approximation and analysis as the useful simpli�cation. Nonetheless, one has to remember that the reality is often complex, nonlinear and full of unknown unknowns. One of the forgotten aspects in control engineering is connected with the symmetricity. Asymmetric properties appear, when the process or instrumentation introduces nonlinearities. Control systems are then exposed to the asymmetrical behavior and should properly react, while their performance measures have to take them into account. This paper proposes robust control performance indexes in form of the M-estimator using logistic function denoted �H and �-stable distribution scale factor . Additionally, their application procedure in industrial chemical engineering environment is proposed. The approach is illustrated with an example of the pH neutralization process.
|Journal series||IEEE Access, ISSN 2169-3536|
|Publication size in sheets||0.55|
|Keywords in English||Asymmetry, control performance assessment, fat-tails, MPC, pH neutralization|
|ASJC Classification||; ;|
|Score||= 100.0, 17-06-2020, ArticleFromJournal|
|Publication indicators||= 0; : 2018 = 1.718; : 2018 = 4.098 (2) - 2018=4.54 (5)|
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