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Delta Wing Pitching Oscillation of Unsteady Aerodynamic Reduced Order Method Research
Received date: 2018-07-05
Online published: 2025-05-29
In order to identify the aerodynamic forces and moments of the delta wing pitch oscillation, an unsteady aerodynamic reduction method is proposed by using the single input Volterra series. The number of identification parameters of the model is compressed by wavelet transform. The lift and pitch moment coefficients for sinusoidal oscillations of 3° and 5° amplitude delta wings are predicted at two average angles of attack using reduced order method. The linear and nonlinear components of the first order and second order Volterra kernels in the time domain and frequency domain are studied. The results show that the linear and nonlinear components of the aerodynamic and torque responses of the delta wing pitching oscillation increase significantly with the increase of the average angle of attack.
Key words： delta wing; nonlinear; Volterra series; reduced order model; wavelet transform
GUO Jiarui , GUAN Shixi , LI Lizhou , JIA Kai , CHANG Jing . Delta Wing Pitching Oscillation of Unsteady Aerodynamic Reduced Order Method Research[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2018 , 38(6) : 85 -90 . DOI: 10.15892/j.cnki.djzdxb.2018.06.019
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