Ride control method of wave-piercing catamaran with T-foil and flaps

Zhang, Songtao; Li, Shuanglin; Liang, Lihua; Sun, Mingxuan

doi:10.1109/icma.2014.6885750

Cited by 8 publications

(3 citation statements)

References 5 publications

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“…They reported a 20% reduction of MSI in 3 m waves at the fore location of the vessel using a linear control RCS with medium slew rate, compared with the no RCS case. 5 Similarly, Zhang et al 45 built a mathematical model of a 90 m WPC travelling at 40 knots based on strip theory, and estimated the reduction of MSI by comparing the WPC fitted with active T-foil and tabs, and without RCS. It is worth mentioning that though the predicted MSI on the centreline reduced from 19% to 5%, the estimation method of MSI they used was different from the method included in the ISO standard 2631-1.…”

Section: Wave-piercing Catamarans (Wpcs)mentioning

confidence: 99%

Influence of an active T-foil on motions and passenger comfort of a wave-piercing catamaran based on sea trials in oblique seas

Lau

Ali-Lavroff

Holloway

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part M:

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In this paper the influence of a Ride-Control System (RCS) on the Response Amplitude Operator (RAO) of a full-scale high-speed catamaran was investigated using sea trials data. A T-foil and stern tabs were installed on a Wave-Piercing Catamaran (Incat Tasmania Hull 061) to improve ship motions and passenger comfort. More than 40 total effective hours of sea trials were conducted by the US Navy in 2004, encountering sea states 4–5 in the Atlantic Ocean near the United Kingdom. The reduction in Motion Sickness Incidence (MSI) was estimated in order to examine the effectiveness of the RCS in improving passenger comfort. By comparing the case of active RCS (T-foil plus stern tabs) with the case of active stern tabs only, it was found that the T-foil plays a vital role in the passenger comfort enhancement. Based on ISO recommended MSI calculation of a 2-h seaway, the percentage reduction in MSI was estimated, and hence the effectiveness of the T-foil deployment, along with the influence of speeds, headings, location on board and encountered wave height were analysed. A notable improvement in passenger comfort was observed in the real world bow quartering sea by deploying the RCS. An MSI reduction of 21% in high speeds (30–35 knots, [Formula: see text] 0.6) was observed, which was almost twice the MSI reduction (11%) in low speeds (15–20 knots, [Formula: see text] 0.3). However, in terms of MSI percentage reduction, the ability of T-foil in vessel motion control in oblique seas was found to be limited compared to the results in head seas.

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Section: Wave-piercing Catamarans (Wpcs)mentioning

confidence: 99%

Influence of an active T-foil on motions and passenger comfort of a wave-piercing catamaran based on sea trials in oblique seas

Lau

Ali-Lavroff

Holloway

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part M:

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show abstract

“…On a different note, Zhang et al (2014) implemented Ride Control Systems with a Linear-Quadratic-Gaussian controller in a 90 m 2D + t model of a WPC to reduce vertical motion. Their study demonstrated the feasibility of reducing heave motion (about 20%) and pitch motion (about 60%) with RCS in Douglas Sea states 4 to 6, while advancing at a speed of 40 knots.…”

Section: Introductionmentioning

confidence: 99%

High-Speed Catamaran Response with Ride Control System in Regular Waves by Forcing Function Method in Cfd

Lau,

Ali-Lavroff,

Dashtimanesh

et al. 2023

Preprint

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“…With this study, a general neuro-fuzzy model that can be used for any condition and control method has been obtained. Zhang et al (2014) used the LQG control method to smooth the vertical motions of a catamaran. In their work, they designed a ride control system adopting the LQG optimum control theory and analyzed the motions of a catamaran in different sea states.…”

Section: Introductionmentioning

confidence: 99%

Active Control of Vertical Acceleration With T-Foil and Trim Tab Systems in a Fast Ferry

Şahin

İtik

2022

Dokuz Eylül Üniversitesi Denizcilik Fakültesi Dergisi

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This study is concerned with the active T-foil placed near the bow on the keel line of the fast ferry and two active trim tab controls placed at the stern to improve the maritime performance of a fast ferry, whilst improving the comfort and safety of passengers and crew. In the scope of the study, the vertical direction of the fast ferry under the random head waves, heave and pitch motions were taken into account. For the control of T-foil and trim Tabs, PID and LQR control methods were used. The purpose of these controllers is to reduce the acceleration of the heave and pitch motions of the fast ferry by changing the operating angles of the T-foil and trim tab wings. A random wave model was created using the Pierson-Moskowitz model, and simulations were done assuming that the fast ferry was subjected to random head waves. Finally, in order to see the effect of vertical acceleration on passengers, the rate of seasickness (MSI) change of the fast ferry in uncontrolled and controlled states was examined. Mathematical models of fast ferry, T-foil and trim tab and their simulations were carried out in MATLAB / Simulink environment. The simulation results show that T-foil and trim tab Active systems can effectively reduce vertical acceleration by improving heave and pitch motions.

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Ride control method of wave-piercing catamaran with T-foil and flaps

Cited by 8 publications

References 5 publications

Influence of an active T-foil on motions and passenger comfort of a wave-piercing catamaran based on sea trials in oblique seas

Influence of an active T-foil on motions and passenger comfort of a wave-piercing catamaran based on sea trials in oblique seas

High-Speed Catamaran Response with Ride Control System in Regular Waves by Forcing Function Method in Cfd

Active Control of Vertical Acceleration With T-Foil and Trim Tab Systems in a Fast Ferry

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