SELF-TUNING CONTROL SYSTEM ALGORITHMS IMPROVEMENT FOR PROVIDING EFFICIENCY OF ITS STARTING REGIMES
Науковий журнал «Радіоелектроніка, інформатика, управління»
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SELF-TUNING CONTROL SYSTEM ALGORITHMS IMPROVEMENT FOR PROVIDING EFFICIENCY OF ITS STARTING REGIMES |
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Khobin, V. A.; Odessa National Academy of Food Technologies, Odessa, Ukraine Levinskyi, V. M.; Odessa National Academy of Food Technologies, Odessa, Ukraine Levinskyi, M. V.; Odessa National Academy of Food Technologies, Odessa, Ukraine |
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ACS with self-tuning; gain; own motion component; start-up period |
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Context. A whole series of technological type control objects have substantially nonlinear static characteristic, when gain<br />through control channel changes in ten or more times. At the same time typical control systems with unchanged controller parameters<br />lose their stability and switch to the position mode of operation. Automatic control systems (ACS) with self-tuning of the controller<br />parameters allow to save a compromise between quality indicators and processes stability in the systems with such objects. Their<br />algorithms should provide effective system functioning not only in steady-state, but also in transient modes, when set point changes,<br />when control object is being transferred from the initial state, more often from idling, to the state of nominal load. The controlled<br />variable in the start-up modes must not violate the procedural limits of the technological process, since it can lead to emergency<br />situations.<br />Objective. To improve the ACS algorithms with self-tuning for the start-up conditions of the control object, ensuring the completion<br />of the self-tuning procedure during the start-up period and lowering the possibility of emergency situations.<br />Method. Utilizing analysis of the advantageous and disadvantageous factors for the self-tuning procedure, using heuristic<br />method, correction for the algorithms, which were developed earlier for steady-states, was proposed for the start-up period. Algorithms<br />correction efficiency is verified by simulation of the system in the Simulink environment of the MatLab software package.<br />Results. Computer experiments with models of alternative structures of the self-tuning system were planned and conducted. Obtained<br />figures and numerical values characterize the efficiency of its operation in the start-up modes.<br />Conclusions. To complete the self-tuning procedure during the start-up period and to prevent unacceptable dynamic control errors,<br />it is necessary to: a) increase the controller gain and decrease the persistence of the filters in the self-tuning loop during the startup<br />period; b) set the initial value of the control object model gain at the maximum possible level. |
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Zaporizhzhya National Technical University 2018-12-07 16:07:43 |
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application/pdf http://ric.zntu.edu.ua/article/view/150043 |
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Radio Electronics, Computer Science, Control; No 3 (2018): Radio Electronics, Computer Science, Control |
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uk |
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Copyright (c) 2018 V. A. Khobin, V. M. Levinskyi, M. V. Levinskyi |
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