基于改进混合蛙跳算法的船舶推力分配

Ship Thrust Allocation Based on Improved Shuffled Frog Leaping Algorithm

为了提高船舶动力定位系统的定位精度,保障海上正常作业,本文提出了一种基于改进混合蛙跳算法的船舶推力分配方法。建立了以船舶的推进系统功率最小为目标函数,其中目标包括船舶推进器的功率消耗,推进器的磨损,推力的误差。约束条件包括推进器的推力和方向角正常工作大小以及其变化率的大小。针对传统的混合蛙跳算法的初始化和更新规则进行改进。将改进前后的混合蛙跳算法对船舶推力分配问题进行优化求解,仿真的结果表明改进后混合蛙跳算法能有效的降低船舶的功率消耗,并且提高了船舶动力定位系统的相关精度。

In order to improve the positioning accuracy of the ship dynamic positioning system and ensure the normal operation at sea,a ship thrust allocation method based on improved Shuffled Frog Leaping Algorithm is proposed.The objective function is to minimize the power of the propulsion system,including the power consumption,the wear of the propeller and the error of the thrust.The constraints include the ranges of the thrust and direction angle of the propeller for normal operation and their change rates.Then,the improvements in the initialization and update rules of traditional Shuffled Frog Leaping Algorithm are introduced.The improved Shuffled Frog Leaping Algorithm is used to optimize the ship thrust distribution.The simulation results show that the improved Shuffled Frog Leaping Algorithm can effectively reduce the power consumption of the ship and improve the relative accuracy of the ship power positioning system.