Fixed-time control strategy for high-speed unmanned system under switching topology

This paper proposes a fixed-time stability-based control strategy for high-speed unmanned systems (HSUSs) considering practical switching topology scenarios. First, a fixed-time disturbance observer (FixTDO) with initial condition-independent convergence time is designed to handle the system disturbances. Subsequently, an auxiliary system is constructed to address communication switching topology constraints. Furthermore, a fixed-time controller is synthesized to enhance transient performance and system robustness, with a first-order filter incorporated to eliminate differentiation-induced computational divergence. Finally, comparative simulation studies validate the effectiveness and operational feasibility of the proposed algorithm.