TY - JOUR ID - 113996 TI - On the Design of Nonlinear Discrete-Time Adaptive Controller for damaged Airplane JO - Journal of Aerospace Science and Technology JA - JAST LA - en SN - 1735-2134 AU - Dastgerdi, Karim AU - Pazooki, Farshad AU - Roshanian, Jafar AD - Faculty of Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran AD - Faculty of Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran. AD - Department of Aerospace Engineering, K. N. Toosi University of Technology, Tehran, Iran. Y1 - 2019 PY - 2019 VL - 12 IS - 2 SP - 61 EP - 70 KW - Flight Dynamics KW - Nonlinear dynamic inversion KW - tip-wing losing- DO - N2 - airplane in presence of asymmetric left-wing damaged. ‎Variations of the aerodynamic parameters, mass and ‎moments of inertia, and the center of gravity due to ‎damage are all considered in the nonlinear ‎mathematical modeling. The proposed discrete-time ‎nonlinear MRAC algorithm applies the recursive least ‎square (RLS) algorithm as a parameter estimator as ‎well as the error between the real damaged dynamics ‎and a model of nominal undamaged aircraft to ‎generate the desired control commands. The discrete-‎time adaptive control algorithm is augmented with a ‎Nonlinear Dynamic Inversion (NDI) control strategy ‎and is implemented on the NASA generic transport ‎model (GTM) airplane while considering the effect of ‎wing damage and un-modeled actuator dynamics. The ‎stability of the proposed nonlinear adaptive controller is ‎demonstrated through Popov’s hyperstability theory. ‎Simulation results of the introduced controller are ‎compared with the classical discrete-time adaptive ‎control strategy. The results demonstrate the effective ‎performance of the proposed algorithm in controlling ‎the airplane in presence of abrupt asymmetric damage.‎ UR - https://jast.ias.ir/article_113996.html L1 - https://jast.ias.ir/article_113996_5d2017ff7bd4cfa8ec36caf9a4de224b.pdf ER -