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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 Hinfin synthesis whereby the typical single input/single output specifications are translated into the weighting functions of an Hinfin output-feedback synthesis problem. Only longitudinal equations of motions are considered. The objective of this design is to maintain the actual angle of attack alphad 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 Hinfin controller is also proposed. Simulation results indicate that the system satisfies the design requirements quite well

In this paper, the design of an automatic carrier landing system (ACLS) is accomplished using H-infinity techniques, in which the single input/output design specifications were translated into the weighting functions of the H-infinity synthesis problem. The objective of the design is to improve the ACLS's path precision under the worst-case condition of a vertical gust during carrier landing. The design yields a satisfactory response.