Nonlinear Flight Control System Design Including Handling Qualities Evaluation
نویسنده
چکیده
Progress in aircraft designs heavily depend on automatic flight control system. Modern aircraft have a wide flight envelope (linear and nonlinear) region. This study considers the design of stability and control augmentation system (SCAS) in high angle of attack region for a modern type aircraft via back stepping method. Because of highly nonlinear phenomena in aerodynamic parameters, a locally valid linear in the parameters nonlinear aircraft model is defined, of which the unknown parameters are approximated by Lyapunov base update laws. The numerical simulations show that the controller is capable of control aircraft based on conventional handling qualities and has a better time response than the classical PI. KeywordsAircraft pitch control; Nonlinear Flight Region; Backsteppin; SCAS
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