Robust flight control of aircraft in the presence of uncertainties

摘要

The main objective of the paper is to design the robust algorithmsfor advanced aircraft. To improve dynamic performance, increasemanoeuvrability, and expand an operating envelope, the robustconfigurations for stabilization and robust tracking of flight vehiclesare proposed. We formulate criteria for quadratic stabilizability ofuncertain systems via a class of linear controllers using theHamilton-Jacobi-Bellman theory. Necessary and sufficient conditions forrobustness are studied. The robust procedure is applied to theninth-order model of the F-18 fighter aircraft. Modeling results arepresented to demonstrate the dynamic performance of the resultingnonlinear closed-loop system