New tuning formulae for the PI controller applied to processes with integral actions
A new model G<em><sub>m</sub></em>(s), defined by the four measurable parameters ultimate gain, ultimate frequency, amplitude of ultimate oscillation and dead-time, is obtained from tangent to the Nyquist curve at the critical point. This model represents the generalization o...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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University of Defence in Belgrade
2013-02-01
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| Series: | Vojnotehnički Glasnik |
| Subjects: | |
| Online Access: | http://aseestant.ceon.rs/index.php/vtg/article/view/2504 |
| Summary: | A new model G<em><sub>m</sub></em>(s), defined by the four measurable parameters ultimate gain, ultimate frequency, amplitude of ultimate oscillation and dead-time, is obtained from tangent to the Nyquist curve at the critical point. This model represents the generalization of the Ziegler-Nichols process dynamics characterization method, for a large class of stable, integrating and unstable processes G<em><sub>p</sub></em>(s). In the present paper, by applying time and amplitude scaling technique to the model G<em><sub>m</sub></em>(s), a new tuning formulae are developed for the PI controller. These tuning formulae guarantee almost optimal performance/robustness tradeoff for a large class of processes with integral action. |
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| ISSN: | 0042-8469 2217-4753 |