摘要
针对具有外部复杂扰动和未知系统动态的水下潜航器轨迹跟踪控制问题,本文研究一种基于固定时间并带有预设性能函数的积分滑模精确控制方案,该控制器保证了闭环系统的稳态响应始终在预定义范围内。构造新的固定时间干扰观测器,用于实时估计和补偿未知扰动量。将预设性能控制、固定时间方法和非奇异快速终端滑模相结合设计控制算法,使轨迹跟踪误差收敛到预定范围内。同时,为改善滑模控制带来的抖振问题,引入双曲正切函数代替符号函数。最后,理论分析证明该闭环系统的稳定性,仿真及仿真对比结果验证了所设计控制律的有效性和优越性。
In this paper,for the underwater submarine trajectory tracking control problem with external complex per-turbations and unknown system dynamics,an integral sliding mode exact control scheme based on fixed time with a preset performance function is investigated,and the controller ensures that the steady-state response of the closed-loop system is al-ways within a predefined range.A new fixed-time integral sliding mode disturbance observer(FISMDO)is constructed for real-time estimation and compensation of unknown disturbances.The control algorithm is designed by combining the preset performance control,the fixed-time method,and the non-singular fast terminal sliding mode so that the trajectory tracking error converges to a predefined range.Meanwhile,in order to improve the jitter problem caused by the sliding mode control,the hyperbolic tangent function is introduced instead of the sign function.Finally,the theoretical analysis proves the stability of the closed-loop system,and the simulation and simulation comparison results verify the effectiveness and superi-ority of the designed control law.
作者
刘萌萌
王冰
王迪
王俊玮
王昱
王海龙
LIU Mengmeng;WANG Bing;WANG Di;WANG Junwei;WANG Yu;WANG Hailong(College of Artificial Intelligence and Automation,Hohai University,Changzhou 213000,China)
出处
《舰船科学技术》
北大核心
2025年第5期118-125,共8页
Ship Science and Technology
基金
国家自然科学基金资助项目(62303157)。
关键词
水下潜航器
轨迹跟踪
固定时间控制
预设性能
autonomous underwater vehicle(AUV)
trajectory tracking
fixed-time control
prescribed performanc
