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We study a motion coordination problem where a group of agents is required to reach consensus while tracking a leader's sinusoidal reference velocity. We assume that the frequency of the reference velocity is available only to the leader. Building on an existing passivity-based internal model control design, we develop a decentralized two-time-scale adaptive control that estimates the unknown frequency...
We consider a motion coordination problem with second order agent dynamics and examine the closed-loop robustness with respect to switching topology, variation of link gain, and unmodeled dynamics. In each case, we illustrate with examples possible instability mechanisms and discuss under what conditions stability is maintained.
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