Estimator Design for Minimizing Vertical Motion of Hydrofoil Craft in Ocean Waves
An Optimization-Based Synthesis Methodology
R.J. Ligthart (TU Delft - Mechanical Engineering)
S.H. Hossein Nia Kani – Mentor (TU Delft - Mechanical Engineering)
J.G. Bruining – Mentor (Flying Fish)
M.A. Zagorowska – Graduation committee member (TU Delft - Mechanical Engineering)
G.J. Verbiest – Graduation committee member (TU Delft - Mechanical Engineering)
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Abstract
This paper presents an estimator synthesis methodology that uses an optimization approach to construct estimators which minimize the vertical acceleration response of a hydrofoil craft in ocean waves. The optimal estimator structure is identified, and a fundamental tradeoff between reducing wave-following motion and the required strut height is discovered and characterized. The developed methodology is validated through its application to a scale-model hydrofoil ship, resulting in a reduction of up to 70% in vertical acceleration magnitude compared to the ship's original estimator.
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