Abstract
This paper considers the boundary state and output feedback stabilization of a one-dimensional wave equation with in-domain velocity feedbacks/recirculations of multi-intermediate points respectively. Constructing an auxiliary control system with nonlocal terms which are the displacements at the same intermediate points, we design a state feedback controller for the original system by a two-step backstepping transformation. The resulting closed-loop of original system is proved to be well-posed and exponentially stable. Then an observer-based output feedback controller is proposed to exponentially stabilize the original system. Finally, some numerical simulations are presented to validate the theoretical results.
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