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Predictive Control for a Fin Stabilizer핀안정기의 예측제어

Other Titles
핀안정기의 예측제어
Authors
윤현규이경중황태현
Issue Date
30-9월-2007
Publisher
Korean Institute of Navigation and Port Research
Keywords
Predictive control; Fin stabilizer; Wave-induced moment; Optimal control theory; Roll reduction
Citation
International Journal of Navigation and Port Research, v.31, no.7, pp 597 - 603
Pages
7
Journal Title
International Journal of Navigation and Port Research
Volume
31
Number
7
Start Page
597
End Page
603
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/1437
Abstract
A predictive controller can solve a control problem related to a disturbance-dominant system such as roll stabilization of a ship in waves. In this paper, a predictive controller is developed for a fin stabilizer. Future wave-induced moment is modeled simply using two typical regular wave components for which six parameters are identified by the recursive Fourier transform and the least squares method using the past time series of the roll motion. After predicting the future wave-induced moment, optimal control theory is applied to discover the most effective command fin angle that will stabilize the roll motion. In the results, wave prediction performance is investigated, and the effectiveness of the predictive controller is compared to a conventional PD controller.
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