Abstract
This article investigates the fixed-time leader-following consensus problem for high-order nonlinear multiagent systems dominated by the lower triangular model with a time-varying gain. Based on the fixed-time distributed observer and dynamic gain control approach, a new dynamic controller is developed with two online tuned gains such that the fixed-time leader-following consensus is achieved. It is mathematically proved that the upper bound of the convergence time only depends on system parameters and controller parameters, which makes it possible to obtain a prescribed convergence time regardless of the initial conditions. Simulation results are given to demonstrate the proposed results.
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