Abstract
Control to improve control characteristics of aicraft, CA (Control Augmentation), is used to realize the desirable motion of aircraft corresponding to pilot's control action. C* criterion is an important factor for the pilot's preferred longitudinal motion. The time history of C* corresponding to step input is specified to be within the upper and lower envelope, and that near the center of the envelope is best for the pilot's easy control. In this research, the control laws for control augmentation of small supersonic aircraft were designed using fuzzy logic control to obtain the C* response near the center of the envelope. The evaluation of the designed control laws showed good performance in all flight conditions. Here, the control laws were varied by only one scaling factor for dynamic pressure. Therefore, the gain schedules by Mach number and angle of attack, which are necessary for supersonic aircraft in which the control laws were designed by model following optimal control, are not necessary. This proves that fuzzy logic control is an effective and flexible method when applied to control laws for control augmentation of aircraft.
