混合遗传算法下欠驱动船舶航向保持控制方法  

A hybrid genetic algorithm based underactuated ship heading maintenance control method

作　　者：阳熠恒 王志博[2] YANG Yiheng;WANG Zhibo(College of Ocean Engineering,Jiangsu Ocean University,Lianyungang 222005,China;Department of Mechanics and Science Engineering,Fudan University,Shanghai 200433,China)

机构地区：[1]江苏海洋大学海洋工程学院,江苏连云港222005 [2]复旦大学力学与科学工程系,上海200433

出　　处：《舰船科学技术》2024年第13期77-81,共5页Ship Science and Technology

摘　　要：欠驱动船舶容易受到风、浪、洋流等外部环境因素的影响,导致航向偏离、船体摇晃,航行安全风险增加,为提高其在各种海况下的稳定性和安全性,提出混合遗传算法下欠驱动船舶航向保持控制方法。构建欠驱动船舶数学模型描述其动态行为,设计包含跟踪微分器和分数阶滑膜控制器的航行保持控制器,生成期望航向的平滑过渡过程,为后者提供航向角速度和角加速度信号。以航向误差作为其输入控制量,通过设计的分数阶滑膜面和控制律实现期望航向追踪,采用混合遗传算法优化控制器参数,提高航向跟踪效果。实验结果表明:该方法可实现不同海况下船舶航向保持控制,控制效率高、航向控制超调量小。Underactuated ships are easily affected by external environmental factors such as wind,waves,and ocean currents,leading to heading deviation,hull sway,and increased navigation safety risks.To improve their stability and safety in various sea conditions,a hybrid genetic algorithm based underactuated ship heading maintenance control method is proposed.Construct a mathematical model for underactuated ships to describe their dynamic behavior,design a navigation holding controller that includes a tracking differentiator and a fractional order sliding film controller,generate a smooth transition process for the desired heading,and provide the latter with heading angular velocity and angular acceleration signals.Using heading error as its input control variable,the desired heading tracking is achieved through a designed fractional order sliding surface and control law.The controller parameters are optimized using a hybrid genetic algorithm to improve the heading tracking effect.The experimental results show that this method can achieve ship heading control under different sea conditions,with high control efficiency and small heading control overshoot.

关 键 词：混合遗传算法 欠驱动船舶 航向保持控制 期望航向 控制律 

分 类 号：U664.82[交通运输工程—船舶及航道工程]