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Acta Armamentarii ›› 2018, Vol. 39 ›› Issue (12): 2427-2437.doi: 10.3969/j.issn.1000-1093.2018.12.017

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Switching-line-of-sight-guidance-based Robust Adaptive Path-following Control for Underactuated Unmanned Surface Vehicles

ZENG Jiang-feng1,2, WAN Lei1,2, LI Yue-ming1,2, ZHANG Ying-hao1,2, ZHANG Zi-yang1,2, CHEN Guo-fang1,2   

  1. (1.Science and Technology on Underwater Vehicle Laboratory, Harbin Engineering University, Harbin 150001, Heilongjiang, China; 2.College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China)
  • Received:2018-04-04 Revised:2018-04-04 Online:2019-01-31

Abstract: A robust adaptive control method is proposed for the way-point-based path following control of underactuated unmanned surface vehicles (USVs). A switching line-of-sight (LOS) guidance law is designed to keep USV always running to a desired path with the best LOS circle radius. Switching LOS guidance law has the advantages of less computing burden and faster convergence compared to the traditional guidance methods. Considering the system uncertainties of vehicle and the unknown time-varying disturbances, a composite neural network controller is developed to enhance the robustness of the system. The approximation accuracy of network is improved by adding the predicted error information in the network input. The number of online adaptive parameters is reduced, which effectively lightens the computing burden, by using the minimal learning parameter techniques to optimize the network structure. The stability of system is analyzed based on the Lyapunov theory. The simulated results are presented to demonstrate the effectiveness of the proposed control strategy. Key

Key words: underactuatedunmannedsurfacevehicle, pathfollowing, adaptivecontrol, neuralnetwork

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