Integrated Flight Thrust Control via LMI-Based Hinfty Synthesis in Automatic Carrier Landing System

In this paper our purpose is to present the result of a design effort to improve the integrated flight/thrust control system (IFTCS). This was accomplished using LMI-based H_infin synthesis whereby the typical single input/single output specifications are translated into the weighting functions of an H_infin output-feedback synthesis problem. Only longitudinal equations of motions are considered. The objective of this design is to maintain the actual angle of attack alpha_d as the airplane is passing through the ramp where the tracking radar does not work and the guidance signal is terminated. Next, the dynamic tracking and wind attenuation abilities of the system is analyzed. Last, for engineering application, an order-reduction method of the H_infin controller is also proposed. Simulation results indicate that the system satisfies the design requirements quite well