本論文主要模擬風帆輔助船舶在航行狀況下，評估同時對風帆及舵作自動控制之船體反應及節能效果。本文中利用瞄準線方式找出欲保持航向，使用PD控制器控制舵角以維持目標航向，並根據欲使用風帆之空氣動力性能曲線找出理想之轉帆角以得最大推力或最小阻力。時程領域之運動反應則以四階之數值方法求解。其中相對風速對推力的影響最為顯著。本文所建立之數學模式對於初步設計風帆之自動控制系統及未來風能利用之技術發展都有相當大的助益。

In this study, simulation of a sail-assisted vessel’s ship dynamic responses under service conditions is investigated. Energy-saving effect based on automatic control was also assessed. The line-of-sight method is used to decide the desired heading angle and then a PD controller is used to manipulate rudder angle in order to maintain the target course. Furthermore, the way of deciding the ideal sail turning angle based on the aerodynamic characteristics curve is established to get the maximum thrust or minimum resistance. Ship motions were computed by the fourth Runge-Kutta method. The relative velocity has a significant effect on the thrust. Mathematical model established in this study is useful for the preliminary design of the automatic control system of sails on a ship and it’s also helpful to the future development of wind energy.

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