两对鳍系统优化控制方法的研究

重点研究了前后两对鳍系统的控制优化问题。针对目前应用的两对鳍系统中控制器不能控制前后鳍总的扶正力矩问题，根据无干扰后鳍静态水动力特性曲线将后鳍转角分为有效鳍角和无效鳍角，这样就将复杂的前鳍对后鳍水动力干扰问题映射为简单可控的前鳍鳍角对后鳍有效鳍角干扰问题，在此分析基础上，对后鳍随动系统控制进行改进，实行复合控制来优化补偿后鳍有效鳍角的损失，提高后鳍的升力，使后鳍升力在有、无前鳍干扰时保持一致，优化控制后的控制器能够完全控制前后鳍合扶正力矩。同时，这一优化控制方法在两对鳍系统的设计安装也具有重大意义。

Research on optimized control of a four-stabilizer fin system

Research was done to study and optimize the control system with two pairs of fin stabilizers to reduce ship rolling. Because the present controller cannot control the resultant lift moment from the two pairs of fin stabilizers, a new method was brought forward. According to the undisturbed static hydrodynamic curve, the back fins' angle is divided into two kinds: effective fin angle and ineffective fin angle. The problem of the complicated hydrodynamic disturb was transformed into a simple control problem; the disturbing from the two pairs of fin angle to back fins' angle. Based on this theory, in order to increase the lift of the back fins, the servo 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 stabilizer fins or not. The optimized controller was able to completely control the fore and back fins' lift moment. In the long run, the optimized control method has profound significance in designing and fitting the control system with two pairs of fin stabilizers.