Decentralized robust decoupling control for looper tension and height system

Yang, Zhe; Liu, Ding; Xiaoli, Chao; Wang, Rui; Qian, Fucai; Zheng, Gang

doi:10.1109/chicc.2015.7259658

Cited by 1 publication

(1 citation statement)

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“…Metals 2019, 9, 839; doi:10.3390/met9080839 www.mdpi.com/journal/metals while a two nested closed loop scheme, a decoupling decentralized control and an H ∞ robust controller, was presented in [13]. Hearns and Grimble [14] proposed an inferential control designed by the quantitative feedback theory (QFT) technique for strip tension control.…”

Section: Introductionmentioning

confidence: 99%

Parametric Robust Control of the Multivariable 2 × 2 Looper System in Steel Hot Rolling: A Comparison between Multivariable QFT and H∞

Cantú

Mendiola

Domínguez

et al. 2019

Metals

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Two robust mutlivariable controllers, H∞ 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∞ 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.

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Section: Introductionmentioning

confidence: 99%