Nonlinear model predictive control-based guidance law for path following of unmanned surface vehicles. (15th August 2022)

• Record Type: Journal Article
• Authors: Bejarano, Guillermo; Manzano, José María; Salvador, José Ramón; Limon, Daniel
• Is Part Of: Ocean engineering. Volume 258(2022)
• Publication Date: 2022-08-15
• Subjects: Unmanned surface vehicles -- Path following control -- Nonlinear systems -- Model predictive control -- Robust stability; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2022.111764
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: This work proposes a nonlinear model predictive control-based guidance strategy for unmanned surface vehicles, focused on path following. The application of this strategy, in addition to overcome drawbacks of previous line-of-sight-based guidance laws, intends to enable the application of predictive strategies also to the low-level control, responsible for tracking the references provided by the guidance strategy. The stability and robustness of the proposed strategy are theoretically discussed. Furthermore, given the non-negligible computational cost of such nonlinear predictive guidance strategy, a practical nonlinear model predictive control strategy is also applied in order to reduce the computational cost to a great extent. The effectiveness and advantages of both proposed strategies over other nonlinear guidance laws are illustrated through a complete set of simulations. Highlights: A nonlinear model predictive control-based guidance strategy for USVs is proposed. The robustness and stability of the proposed strategy are theoretically shown. A practical predictive strategy is also applied to reduce the computational cost. Simulations show the effectiveness of the proposed strategies over existing laws.