Control Augmentation Using Fuzzy Logic Control.

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  • Kato Akio
    Department of Transportation Engineering, Faculty of Science and Technology, Meijo University
  • Inukai Daisuke
    Mechanical Engineering Course, Graduate School of Science and Technology, Meijo University

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Abstract

Overall control to improve the control characteristics of an aircraft, CA (Control Augmentation), is used to realize the desirable motion of the aircraft in relation to the pilot’s control action. C∗ criterion is an important factor for the pilot’s preferred longitudinal motion. The time history of C∗ corresponding to the step input is specified within the upper and lower envelope, and it is desirable to be near the center of the envelope. In this research, the control laws of control augmentation for small supersonic aircraft were designed with the use of 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. This means that virtually no gain schedules by the Mach number and the angle of attack are necessary. This paper shows that fuzzy logic control is an effective and flexible method when applied to control laws for the control augmentation of aircraft.

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