The Application of Minimum Entropy H Mixed Sensitivity to Flight Control

Minimum entropy control has been studied extensively. Controllers satisfying a closed-loop minimum entropy condition provide a means of trading off the robustness of H_infin control with the performance of H₂ controller. In this paper, the minimum entropy H_infin mixed sensitivity method is described, followed by the controller design for an aircraft longitudinal flight control. Analysis tests and simulations illustrate that the minimum entropy controller has better performances than most of the other H_infin controllers which belong to a certain subset of the "unit ball in H_infin"