Passive Identification is Non Stationary Objects with Closed Loop Control

Valeriy F. Dyadik, Igor S. Nadezhdin, Alexey G. Goryunov, Flavio Manenti

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Typically chemical processes have significant nonlinear dynamics, but despite this, industry is conventionally still using PID-based regulatory control systems. Moreover, process units are interconnected, in terms of inlet and outlet material/energy flows, to other neighbouring units, thus their dynamic behaviour is strongly influenced by these connections and, as a consequence, conventional control systems performance often proves to be poor. However, there a hybrid fuzzy PID control logic, whose tuning parameters are provided in real time. The fuzzy controller tuning is made on the basis of Mamdani controller, also exploiting the results coming from an identification procedure that is carried on when an unmeasured step disturbance of any shape affects the process behaviour. This paper presents procedure for identifying technological object control in a closed loop, i. e. that operates the automated control system. The variation in the controlled variable, caused by the change of the nonmeasurable disturbance, is considered the initial signal for the identification procedure. The parameters of the control object are found by optimization method Levenberg-Marquardt.

Original languageEnglish
Article number012047
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 2 Sep 2016
Event7th International Scientific Practical Conference on Innovative Technologies in Engineering - Yurga, Russian Federation
Duration: 19 May 201621 May 2016

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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