Estimation of the lateral aerodynamic coefficients for skywalker x8 flying wing from real flight-test data

Rahman Mohammadi Farhadi, Vyacheslav Kortunov, Andrii Molchanov, Tatiana Solianyk

Estimation of the lateral aerodynamic coefficients for skywalker x8 flying wing from real flight-test data

Číslo: 2/2018
Periodikum: Acta Polytechnica
DOI: 10.14311/AP.2018.58.0077

Klíčová slova: flight system identification; aerodynamic coefficient estimation; data co-linearity; least square method; output error method, identifikace letového systému; odhad aerodynamického koeficientu; datová křivkovost; metoda nejmenších čtverců; výstupní chyba

Pro získání musíte mít účet v Citace PRO.

Přečíst po přihlášení

Anotace: Stability and control derivatives of Skywalker X8 flying wing from flight-test data are estimated by using the combination of the output error and least square methods in the presence of the wind. Data is collected from closed loop flight tests with a proportional-integral-derivative (PID) controller that caused data co-linearity problems for the identification of the unmanned aerial vehicle (UAV) dynamic system. The data co-linearity problem is solved with a biased estimation via priori information, parameter fixing and constrained optimization, which uses analytical values of aerodynamic parameters, the level of the identifiability and sensitivity of the measurement vector to the parameters. Estimated aerodynamic parameters are compared with the theoretically calculated coefficients of the UAV, moreover, the dynamic model is validated with additional flight-test data and small covariances of the estimated parameters.