Sliding-mode control of path following for underactuated ships based on high gain observer

Sliding-mode control of path following for underactuated ships based on high gain observer
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基于高增益观测器的欠驱动船舶路径跟踪滑模控制

DOI:
10.1007/s11771-016-3401-9
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发表时间:
2016-12
影响因子:
4.4
通讯作者:
Lin Z
Lin Z
中科院分区:
材料科学3区
文献类型:
--
作者:
Qin Zi-he;Lin Zhuang;Sun Han-bing;Yang Dong-mei;Lin Z

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提出了一种非线性鲁棒控制策略,使欠驱动水面舰船在不确定环境扰动和参数下沿预定路径运动。在控制器设计中,使用高增益观测器来估计速度,因此只需要测量位置和偏航角。通过采用改进的视距制导律,将欠驱动系统的控制问题转化为全驱动系统的控制问题。设计了滑模控制器,消除了偏航角误差,保证了控制系统的鲁棒性。利用李雅普诺夫稳定性理论证明了该控制律的半全局指数稳定,并利用单体船的实际数据进行了数值仿真,验证了该方法的有效性和鲁棒性。
A nonlinear robust control strategy is proposed to force an underactuated surface ship to follow a predefined path with uncertain environmental disturbance and parameters. In the controller design, a high-gain observer is used to estimate velocities, thus only position and yaw angle measurements are required. The control problem of underactuated system is transformed into a control of fully actuated system through adopting an improved line-of-sight (LOS) guidance law. A sliding-mode controller is designed to eliminate the yaw angle error, and provide the control system robustness. The control law is proved semi-globally exponentially stable (SGES) by applying Lyapunov stability theory, and numerical simulation using real data of a monohull ship illustrates the effectiveness and robustness of the proposed methodology.
DOI: --
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