Ho-Hyun Shin/Sang-Hyun Lee/Youdan Kim/Eung-Tae Kim/Ki-Jung Sung
International Journal of Aeronautical and Space Sicences, vol. 12, no. 3, pp.241-251, 2011

Abstract : Most of large commercial aircrafts and high performance military aircrafts use Fly-by-Wire (FBW) or Fly-by-Light (FBL) system to improve the controllability, comfortableness, and safety. With the development of flight control systems utilizing FBW technique, a flight envelope protection technique is used. Flight envelope protection system prevents the aircrafts from exceeding the structure/aerodynamics limits and control surface limit. This can be done by predicting the values of the future state variables and adaptively compensating the control action. In this study, the conventional dynamic trim algorithm of the flight envelope protection is modified to increase the accuracy of the method and to deal with the multiple variable case. To verify the performance of the proposed method, numerical simulation is performed.

Keyword : Flight Envelope Protection, Dynamic Trim Algorithm