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A design of T-foil and trim tab for fast catamaran based on NSGA-II
Journal of Hydrodynamics, 2019This paper proposed an optimization design for a ride control system (RCS) for fast catamaran. The ship vertical motions are predicted by 2.5-D theory. The hydrodynamic characteristics of T-foil and trim tab are given, and the dynamic stability of the system is discussed.
Qi-dan Zhu, Yu Ma
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Ocean Engineering, 2021
Abstract This study experimentally investigated a control method for the vertical stabilization of a trimaran. Experiments were conducted on a bare trimaran, a trimaran with fixed appendages, and one with actively controlled appendages. A T-foil and flap were selected as the stability appendages and installed on the vessel, whose dimension and ...
Zhilin Liu +4 more
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Abstract This study experimentally investigated a control method for the vertical stabilization of a trimaran. Experiments were conducted on a bare trimaran, a trimaran with fixed appendages, and one with actively controlled appendages. A T-foil and flap were selected as the stability appendages and installed on the vessel, whose dimension and ...
Zhilin Liu +4 more
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Operation of T-Foils and Stern Tabs to Improve Passenger Comfort on High-Speed Ferries
Journal of Ship Research, 2021_ High-speed ferries of around 100mlength cruising at around 40 knots can cause significant passenger discomfort in head waves. This is due to the frequencies of encountering waves, of maximum hull response to encountered waves and of maximum passenger discomfort all falling within a similar range.
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Numerical investigation of T-Foil hybrid control strategy for ship motion reduction in head seas
Ocean Engineering, 2020Abstract An active control T-foil can significantly reduce the vertical motions of high-speed ships. In this paper, a hybrid control method is proposed to control the T-foil. The reduction effects of the method, along with passive, linear and step controls, are numerically investigated. A numerical model is introduced firstly.
Yichen Jiang +4 more
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Adjoint Method for Tandem Composite T-foils
SNAME Maritime ConventionThe introduction of composite materials to the construction of high-performance surface craft in the past two decades has pushed the operating limits in appendage design. For vessels with any kind of lifting surface, composite hydrofoils can be hydroelastically tailored to be more hydrodynamically efficient in off-design conditions due to load ...
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MPC-based fault tolerant robust control of surface vessel eqquiped with T-foil
2018 Chinese Control And Decision Conference (CCDC), 2018Incident waves are the primary cause of strong heave and pitch motion during navigation. The longitudinal stability of surface vessels can be improved by the installation of active T-foil. The MPC-based fault tolerant robust control algorithm is proposed in the context of disturbances of incident waves, according to the surface vessel fault model with ...
Zhi-Lin Liu, Yue Sun
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Frequency Domain Study of Longitudinal Motion Attenuation of a Fast Ferry Using a T-Foil
IFAC Proceedings Volumes, 2008Abstract Longitudinal, heave and pitch, motion of ships in response to encountered waves can be smoothed using moving submerged wings, like transom flaps or a T-foil under the bow. Recently a 3 DOF detailed model of the surge, pitch and heave motions of a fast ferry has been developed, in terms of a structure of twelve transfer functions.
J.M. Giron-Sierra, S. Esteban
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Nonlinear vertical plan motion feedback stabilization of a fast ferry with flaps and T-Foil
2016 Chinese Control and Decision Conference (CCDC), 2016Ships are subjected to many disturbance forces, restoring ones and wave excitations causing degradations in the vertical motions which limit the development of high speed ferries. The ships safety as well as the passengers comfort are greatly affected by the vertical acceleration and several concerns arise when experiencing slamming motion and planing ...
Mounia Ticherfatine, Zhu Qidan
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Journal of Ship Research, 2019
High-speed ships often experience over larger ship motions in waves. Therefore, highspeed ships without motion control hardly have practical commercial values. Recent years saw wider adoptions of T-foils on high-speed ships, which greatly improve ship performances in waves. In this study, we designed a series of model tests to study the motion-reducing
Zhi Zong, Yifang Sun, Yichen Jiang
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High-speed ships often experience over larger ship motions in waves. Therefore, highspeed ships without motion control hardly have practical commercial values. Recent years saw wider adoptions of T-foils on high-speed ships, which greatly improve ship performances in waves. In this study, we designed a series of model tests to study the motion-reducing
Zhi Zong, Yifang Sun, Yichen Jiang
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Design of H∞ anti-vertical controller and optimal allocation rule for catamaran T-foil and trim tab
Journal of Ocean Engineering and Marine Energy, 2019This paper proposes an H∞ robust control scheme for a wave-piercing catamaran (WPC) ride control system (RCS) in rough water. The control signal is assigned to the T-foils and trim tabs by an improved genetic algorithm. To reduce the vertical oscillation of a WPC in wave turbulence at high speeds, based on the uncertain parameters model of the coupled ...
Qidan Zhu, Yu Ma
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