基于被动式PD控制策略的“双水舱”减摇系统研究

摘要

A phase lag close to 90 degrees between fluid in the tank stabilizers and ship rolling is kept by opening and closing the valves fixed on the tanks.This paper concerns the passively-controlled problems under irregular disturbance to propose a passively-controlled-double-tank stabilizer, which is composed of two passively-controlled U-tube tanks.Mathematical model and system design were studied.Passive PD control strategy,in which two different ship rolling feedback signals were used to control the fluid motion, was assessed.Numerical simulation was carried out for a RORO ship.The results show that the double-tank system has more effective roll reduction in extended frequencies.%被动可控式U型减摇水舱利用气阀开关控制水舱内液体运动,使之与船舶横摇运动保持π/2相位差.文章针对在随机海浪下水舱被动控制中存在的问题,提出了由两个被动可控式减摇水舱组成的被动可控式双水舱减摇系统,文中对双水舱系统的数学模型及系统设计方法进行了研究,并提出利用不同的船舶横摇信号分别控制两个水舱内液体流动的被控式PD控制策略.以高速滚装船为例,对双水舱系统进行了计算机仿真,仿真结果表明被动可控式双水舱系统在更宽的海浪干扰频率范围内具有更好的减摇效果.