Abstract: This paper designed fuzzy logic controller (FLC) applying in numerical simulations of two typical post-stall maneuvers such as trimmed and sustained flight up to 70 degree angle of attack and Cobra maneuver, after a mathematical model of aircraft was established and the specialties of fuzzy mathematics and fuzzy logic control were analyzed.The results show that the character of the base fuzzy logic controller was improved by adjusting some factors of fuzzy logic controller such as scale factor and quantification factors, or introducing correction factors, and all these can make the aircraft complete these maneuvers in shorter time, and can improve the aircraft dynamic qualities.

Key words: fuzzy logic contr ol, t hr ust vector, post-stall maneuver, Cobra maneuver, dynamic qualities