Fuzzy Adaptive Output-Feedback Constrained Trajectory Tracking Control for HFVs With Fixed-Time Convergence

This article proposes an output-feedback fixed-time trajectory tracking control methodology for hypersonic flight vehicles subject to asymmetric output constraints. In contrast the state of art, most distinguishing feature our design lies in avoiding using conventional recursive methods (e.g., backstepping technique, dynamic surface control, etc.) and not relying on full-state availability. velocity loop, integral barrier Lyapunov function is adopted confine variable within a well-defined compact set all time. altitude after utilizing its cascaded property proposing novel scaling function, original constrained system transformed unconstrained one, which facilitates stability analysis. Moreover, proposed algorithm only involves one fuzzy logic approximator as well differentiator guarantees that errors converge into user-defined residual sets fixed Several comparative simulations have been conducted highlight superiorities developed method.