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Distributed prescribed-time leader-follower formation control of surface vehicles with unknowns and input saturation
Tingting Yang1, Pengfei Zhang1, Huiying Chen1
1School of Engineering, Huzhou University, Huzhou 313000, China.
Abstract:
In this paper, the prescribed-time leader-follower formation control problem is solved for surface vehicles (SVs) suffering from input saturation and unknowns including uncertain dynamics and external disturbances. Based on the information of neighboring vehicles, a distributed prescribed-time observer for estimating states of the leader is proposed. By virtue of input saturation, the saturation errors and system unknowns are observed by a reduced-order prescribed-time estimator. Moreover, to realize the satisfactory formation error constraints, a time scale transformation function based prescribed-time prescribed performance function is proposed, together with error transformations, the transient performance of formation errors is improved. Lyapunov stability theorem and backstepping method prove that the closed-loop system is prescribed-time stable. Simulations are given to illustrate the effectiveness of proposed theoretical results.
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