Study and application of virtual flight simulation for rolling control of vehicles

The control process in roll on a square cross section vehicle is carried out using the engineering technique and the coupled technique, and the study shows that, the simulation results with different method correspond well with each other at slow maneuver condition where unsteady effect of aerodynamics is weak. However, the time lag of FCS using engineering technique is much smaller than that using coupled technique at rapid maneuver state, i.e. the time lag of the FCS may be underestimated with traditional method. This indicates the necessity of the coupled technique in the evaluation of FCS for strong unsteady effect state such as high angle of attack or rapid maneuver.