关键词: 气动参数, 参数辨识, 闭环辨识

Abstract: The maximum likelihood algorithm is used to estimate the aerodynamic coefficients of the closed-loop flight vehicles. Based on the dynamic model of aircraft, using the differential smooth technique, the linear estimation formula of aerodynamic parameters is given. For the closed-loop flight vehicles, determination of aerodynamic model and the effect of nonlinearity of sensors on the accuracy of identification of aerodynamic coefficients are investigated. Finally, some considerations for the aerodynamic parameters estimation in the case of closed-loop flight are given by the estimation results of aerodynamic coefficients from the 6DOF simulated data of a closed-loop vehicle.

Key words: aerodynamic parameter, parameter identification, closed-loop identification