Parametric Robust Control of the Multivariable 2 × 2 Looper System in Steel Hot Rolling: A Comparison between Multivariable QFT and H∞
| Autor: | Pedro Mendiola, Álvaro A. Domínguez, Luis F. Cantú, Alberto Cavazos |
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| Rok vydání: | 2019 |
| Předmět: |
lcsh:TN1-997
looper control 0211 other engineering and technologies 02 engineering and technology 01 natural sciences QFT Quantitative feedback theory Control theory Robustness (computer science) 0103 physical sciences General Materials Science Sensitivity (control systems) parametric uncertainties lcsh:Mining engineering. Metallurgy 021102 mining & metallurgy Parametric statistics Mathematics 010302 applied physics Multivariable calculus Metals and Alloys multivariable control Frequency domain H∞ hot rolling Robust control robust control |
| Zdroj: | Metals Volume 9 Issue 8 Metals, Vol 9, Iss 8, p 839 (2019) |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met9080839 |
| Popis: | Two robust mutlivariable controllers, H&infin and a decentralized quantitative feedback theory (QFT), are designed in the frequency domain for the 2 × 2 looper system in a steel hot rolling mill to keep stability in the presence of parametric uncertainties. The H&infin controller is designed by using the mixed sensitivity approach, while the multivariable decentralized QFT is designed by the extension of the sequential loop closing method presented elsewhere. Stability robustness conditions are verified in the frequency domain, while simulations in time domain are carried out to evaluate the controllers and compare their performance along with that of proportional + integral (PI) and single input single output (SISO) QFT controllers designed earlier. The QFT controller shows the best balance among the performance indicators analyzed here however, at the expenses of using higher power in one of the control inputs. |
| Databáze: | OpenAIRE |
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