Suppression of aerodynamic coupled parasitic loop

Aerodynamic coupled parasitic loop is introduced in this paper. The essence of AADP(Aileron alone departure parameter) and LCDP(Lateral control departure parameter) criterion was studied with this loop. The effect of aerodynamic coupled parasitic loop also was researched. The method to restrain the harmful effect of this loop is also present, and the AADP and LCDP criterion are amended for easy use. The study shows that with the amended criterion the aerodynamic configuration of the vehicle and the control parameters could be adjusted to reduce the harmful effect of the aerodynamic coupled parasitic loop.