SELF-TUNING CONTROL SYSTEM ALGORITHMS IMPROVEMENT FOR PROVIDING EFFICIENCY OF ITS STARTING REGIMES
Keywords:ACS with self-tuning, gain, own motion component, start-up period
AbstractContext. A whole series of technological type control objects have substantially nonlinear static characteristic, when gain
through control channel changes in ten or more times. At the same time typical control systems with unchanged controller parameters
lose their stability and switch to the position mode of operation. Automatic control systems (ACS) with self-tuning of the controller
parameters allow to save a compromise between quality indicators and processes stability in the systems with such objects. Their
algorithms should provide effective system functioning not only in steady-state, but also in transient modes, when set point changes,
when control object is being transferred from the initial state, more often from idling, to the state of nominal load. The controlled
variable in the start-up modes must not violate the procedural limits of the technological process, since it can lead to emergency
Objective. To improve the ACS algorithms with self-tuning for the start-up conditions of the control object, ensuring the completion
of the self-tuning procedure during the start-up period and lowering the possibility of emergency situations.
Method. Utilizing analysis of the advantageous and disadvantageous factors for the self-tuning procedure, using heuristic
method, correction for the algorithms, which were developed earlier for steady-states, was proposed for the start-up period. Algorithms
correction efficiency is verified by simulation of the system in the Simulink environment of the MatLab software package.
Results. Computer experiments with models of alternative structures of the self-tuning system were planned and conducted. Obtained
figures and numerical values characterize the efficiency of its operation in the start-up modes.
Conclusions. To complete the self-tuning procedure during the start-up period and to prevent unacceptable dynamic control errors,
it is necessary to: a) increase the controller gain and decrease the persistence of the filters in the self-tuning loop during the startup
period; b) set the initial value of the control object model gain at the maximum possible level.
Landau I. D. Adaptive Control. London, Springer-Verlag
London Limited, 2011, 234 p. DOI: 10.1007/978-0-85729-
Isermann R. Digital Control Systems. Berlin, Springer-
Verlag Berlin Heidelberg, 1991, 325 p. DOI: 10.1007/978-
Astrom K., Hagglund T. The Future of PID Control, IFAC
Proceedings Volumes, April 2000, Volume 33, Issue 4,
рр. 19–30. DOI: 10.1016/S1474-6670(17)38216-2
Khobin V. A., Levinskyi M. V. Optimizacija fil’trov
sobstvennogo dvizhenija samonastrai-vajushhejsja SAU
objektom tehnologicheskogo tipa, Radio Electronics, Computer
Science, Control, 2016, No. 4, pp. 120–129. DOI:
Khobin V. A., Levinskyi M. V. Principi, algoritmi і
rezul’tati pіdvishhennja efektivnostі samonalagodzhuval’noї
sistemi keruvannja ob’єktom tehnologіchnogo tipu, Radio
Electronics, Computer Science, Control, 2017, No. 2,
pp. 172–181. DOI: 10.15588/1607-3274-2017-2-19
Landau I. D., Lozano R., M’Saad M., Karimi A. Adaptive
Control. Algorithms, Analysis and Applications. New York,
Springer London Dordrecht Heidelberg, 2011, 610 p. DOI:
Maggio M., Leva A. The PID+p controller structureand its
contextual model-based tuning, IFAC Proceedings Volumes,
January 2011, Volume 44, Issue 1, pp. 4101–4106. DOI:
Kolaj W., Syfert M. PLC-PIDTuner: Application for PID
Tuning with SIMATIC S7 PLC Controllers, IFAC Proceedings
Volumes, 2010, Volume 43, Issue 2, pp. 343–348. DOI:
Xue D., Chen Y., Atherton D. Linear feedback control:
analysis and design with MATLAB, Philadelphia, Siam,
, 356 p. DOI: 10.1137/1.9780898718621
Higham D., Higham N. MATLAB Guide, Third Edition.
Philadelphia, Siam, 2016, 462 p. DOI:
How to Cite
Copyright (c) 2018 V. A. Khobin, V. M. Levinskyi, M. V. Levinskyi
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Creative Commons Licensing Notifications in the Copyright Notices
The journal allows the authors to hold the copyright without restrictions and to retain publishing rights without restrictions.
The journal allows readers to read, download, copy, distribute, print, search, or link to the full texts of its articles.
The journal allows to reuse and remixing of its content, in accordance with a Creative Commons license СС BY -SA.
Authors who publish with this journal agree to the following terms:
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License CC BY-SA that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.