顺馈-反馈技术在船舶姿态控制中的应用

Application of Feedforward-feedback Control in Control Model of Ship Motion

重点研究了两对鳍的船舶减摇模型的控制优化问题。现有的两对鳍船舶减摇模型中,前鳍对后鳍的严重的水动力干扰问题一直没有得到有效的解决。根据无干扰后鳍静态水动力特性曲线,对后鳍随动系统进行了改进,提出基于顺馈-反馈控制的两对鳍船舶减摇控制的优化模型,并通过simulink对两对鳍的船舶减摇控制优化模型进行了计算机仿真。仿真结果表明,该方法有效补偿了后鳍有效鳍角的损失,提高了后鳍的升力,使后鳍升力在有无前鳍干扰时保持了一致,有效的解决了前鳍对后鳍的严重水动力干扰问题。

Research was done to study and optimize the anti-roll model of ship with two pairs of fin stabilizers to reduce ship rolling. Because the back fins were seriously influenced by the fore fins in the present two pairs of fin stabilizers system, a new method was worked out. According to the undisturbed static hydrodynamic curve, the back fins＇ angle is divided into two kinds： effective fin angle and ineffective fin angle. Based on this theory, in order to increase the lift of the back fins, the feedforward-feedback system was improved to compensate for the loss of the effective back fins ＂ angle. The improved control system makes the back fins provide the same lift whether there is a disturbing from fore fin stabilizers or not. Finally, the optimized model was analyzed through Simulink. The simulation result proves that this method can solve the problem efficiently.