升力反馈控制减摇鳍系统

对减摇鳍的静态、动态水动力特性进行了分析研究,指出影响鳍的动态升力特性的本质原因.讨论了传统的鳍角反馈减摇鳍设计原理存在的问题,指出鳍角反馈在运动过程中不能正确反映鳍的动态水动力特性.在鳍角反馈的基础上,提出了升力反馈控制方式,通过直接测量鳍上的动态升力作为系统的反馈信号.以某型船的减摇鳍设计参数为参考,采用升力反馈控制,以必要的工程条件为限制条件,进行了角度反馈控制与升力反馈控制的对比仿真试验研究.仿真结果对比显示升力反馈控制可以有效弥补鳍角反馈控制方式存在的控制偏差,使减摇鳍系统的综合减摇能力得到显著提高.

Fin Stabilizers Based upon Lift-feedback

In this paper, the static and dynamic hydrodynamic characters of the fin stabilizer are analyzed, and the essential dynamic hydrodynamic factors of the fin stabilizer are pointed out. After discussing the shortcoming of angle-feedback control method, it is concluded that the angle-feedback control method could not reflect dynamic hydrodynamic character of the fin stabilizer correctly. Based on angle-feedback control, a new way named lift-feedback control is proposed, which uses lift signal measured directly as the feedback signal, and packs uncertainty between fin angle and lift to make up the shortage of angle-feedbak. At last, refering to a ship's fin stabilizer parameters, and adopting engineering experience as limit conditions, comparing simulation is performed. Simulation result shows that the lift-feedback control can make up lift error caused by angle-feedback and improve the fin stabilizer's stabilizing efficiency.