Design Waves for Maximum Ship Loads

Hamburg-Harburg, TU

doi:10.1179/str.2005.52.3.008

Cited by 2 publications

(3 citation statements)

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“…The particles of the fluid accelerate to some extent as the catamaran moves [ 42 ]. The hydrodynamic added mass in the surge (

) can be given as

[ 43 , 44 ], where

(kg/m 3 ) is the density of the sea water. The added mass coefficients in the sway (

) and yaw (

) can be approximately calculated as

m and

, respectively [ 41 , 44 ].…”

Section: Discussionmentioning

confidence: 99%

Path following Control of an Underactuated Catamaran for Recovery Maneuvers

Lee

Song

Kim

et al. 2022

Sensors

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This paper focuses on the autonomous recovery maneuvers of an unknown underactuated practical catamaran, which returns to its initial position corresponding to the man overboard (MOB) by simply adjusting the rate of turn. This paper investigates the completion of model-based path following control for not only the traditional Williamson turn, but also complex recovery routes under time-varying disturbances. The main difficulty of model-based path following control for predicting the hydrodynamic derivatives of a practical catamaran was solved by the approximated calculation of a diagonal matrix. The second key problem of differential calculation for an underactuated model in the case of complex reference trajectories under severe disturbances was investigated. Even though this paper employs a diagonal matrix with unknown nonlinear terms, the experimental test using a small craft with payloads by remote control demonstrated the sway force per yaw moment in turning cases. Adaptive backstepping mechanisms with unknown parameters were proven by the Lyapunov theory as well as the passive-boundedness of the sway dynamics, guaranteeing the stability of sway motion in the case of unavailable sway control. The effectiveness of the algorithms of the guiding concept and error dynamics is demonstrated by the numerical simulations.

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“…The particles of the fluid accelerate to some extent as the catamaran moves [ 42 ]. The hydrodynamic added mass in the surge (

) can be given as

[ 43 , 44 ], where

(kg/m 3 ) is the density of the sea water. The added mass coefficients in the sway (

) and yaw (

) can be approximately calculated as

m and

, respectively [ 41 , 44 ].…”

Section: Discussionmentioning

confidence: 99%

Path following Control of an Underactuated Catamaran for Recovery Maneuvers

Lee

Song

Kim

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…4(d), where the data distribution arranges around an mean advance speed of 19 knots. In addition, the measured joint distribution of 𝐻 𝑠 and 𝑇 𝑝 is compared to long term wave climate statistics in the Northern Atlantic provided by Söding [31] in Fig. 5.…”

Section: 𝛽 = Arctan(𝑑∕𝑐)mentioning

confidence: 99%

“…However, the covariance in case of the measurements is slightly larger compared to the modelled long term statistics. It is noted that the latter is based on hindcast wave spectra determined from wind fields during 10 years, [31]. Hence, different sources and magnitudes of epistemic (i.e.…”

Section: 𝛽 = Arctan(𝑑∕𝑐)mentioning

confidence: 99%