This paper presents the motion control of a fast ship equipped with fully submerged hydrofoils in following waves. The change of lift force produced by the orbital motion of fluid particles is included as a time-varying disturbance in the equation of coupled heave and pitch motions, and the corresponding state-space equation is derived. Three control algorithms, including proportional–integral–derivative (PID), linear quadratic regulator (LQR) and sliding mode controls are applied for regular and irregular wave conditions, and the subsequent motion responses are compared. Motion responses are also compared with existing experimental data to observe the effectiveness of each algorithm. In order to investigate the robustness of each control algorithm, systematic motion simulations are performed for various wavelengths and wave heights. PID control is easy to implement as is well known, however a poor performance is observed in irregular waves. LQR control predicts robust and stable motion and acceleration throughout all the simulations. Sliding mode control shows excellent performance particularly when the disturbance is known, despite its sensitivity to wave environments.
Control of the vertical motion of a hydrofoil vessel
Ships and Offshore Structures ; 5 , 3 ; 189-198
2010-09-02
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Control of the vertical motion of a hydrofoil vessel
Online Contents | 2010
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