Journal ArticleDOI
Adaptive Dynamic Surface Control for Formations of Autonomous Surface Vehicles With Uncertain Dynamics
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TLDR
A robust adaptive formation controller is developed by employing neural network and dynamic surface control technique and is able to capture the vehicle dynamics without exact information of coriolis and centripetal force, hydrodynamic damping and disturbances from the environment.Abstract:
In this brief, we consider the formation control problem of underactuated autonomous surface vehicles (ASVs) moving in a leader-follower formation, in the presence of uncertainties and ocean disturbances. A robust adaptive formation controller is developed by employing neural network and dynamic surface control technique. The stability of the design is proven via Lyapunov analysis where semiglobal uniform ultimate boundedness of the closed-loop signals is guaranteed. The advantages of the proposed formation controller are that: first, the proposed method only uses the measurements of line-of-sight range and angle by local sensors, no other information about the leader is required for control implementation; second, the developed neural formation controller is able to capture the vehicle dynamics without exact information of coriolis and centripetal force, hydrodynamic damping and disturbances from the environment. Comparative analysis with a model-based approach is given to demonstrate the effectiveness of the proposed method.read more
Citations
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Journal ArticleDOI
Adaptive output-feedback formation control for underactuated surface vessels
TL;DR: A novel adaptive output-feedback formation control scheme is developed that can enhance the robustness of the closed-loop system with less computational effort, where only two online parameters need to be tuned.
Journal ArticleDOI
Fault‐tolerant containment control of uncertain nonlinear systems in strict‐feedback form
TL;DR: In this article, a fault-tolerant containment control scheme was developed to guarantee that the outputs of all followers converge to the convex hull spanned by multiple dynamic leaders with bounded containment errors.
Journal ArticleDOI
A task-based hierarchical control strategy for autonomous motion of an unmanned surface vehicle swarm
TL;DR: In this article, a hierarchical control framework with relevant algorithms is proposed to achieve autonomous navigation for an underactuated unmanned surface vehicle (USV) swarm, which is divided into three layers based on task assignments: flocking strategy design, motion planning and control input design.
Journal ArticleDOI
Adaptive-observer-based formation tracking of networked uncertain underactuated surface vessels with connectivity preservation and collision avoidance
Bong Seok Park,Sung Jin Yoo +1 more
TL;DR: The proposed formation tracker does not require additional neural networks to estimate unknown nonlinearities derived from the tracker design procedure, and the proposed theoretical result is proved in the sense of Lyapunov.
Journal ArticleDOI
Intelligent event-based output feedback control with Q-learning for unmanned marine vehicle systems
TL;DR: Compared with the existing results in literature, it is shown that the proposed control algorithm can provide a better tracking performance and reduces the communication load effectively.
References
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Approximation capabilities of multilayer feedforward networks
TL;DR: It is shown that standard multilayer feedforward networks with as few as a single hidden layer and arbitrary bounded and nonconstant activation function are universal approximators with respect to L p (μ) performance criteria, for arbitrary finite input environment measures μ.
Journal ArticleDOI
Information flow and cooperative control of vehicle formations
J.A. Fax,Richard M. Murray +1 more
TL;DR: A Nyquist criterion is proved that uses the eigenvalues of the graph Laplacian matrix to determine the effect of the communication topology on formation stability, and a method for decentralized information exchange between vehicles is proposed.
Journal ArticleDOI
Behavior-based formation control for multirobot teams
Tucker Balch,Ronald C. Arkin +1 more
TL;DR: New reactive behaviors that implement formations in multirobot teams are presented and evaluated and demonstrate the value of various types of formations in autonomous, human-led and communications-restricted applications, and their appropriateness in different types of task environments.
Journal ArticleDOI
Dynamic surface control for a class of nonlinear systems
TL;DR: A method is proposed for designing controllers with arbitrarily small tracking error for uncertain, mismatched nonlinear systems in the strict feedback form and it is shown that these low pass filters allow a design where the model is not differentiated, thus ending the complexity arising due to the "explosion of terms" that has made other methods difficult to implement in practice.
Journal ArticleDOI
Information flow and cooperative control of vehicle formations
TL;DR: It is demonstrated how exchange of minimal amounts of information between vehicles can be designed to realize a dynamical system which supplies each vehicle with a shared reference trajectory.