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

摘要

The unsteady effect of aerodynamics is inadequately considered in the evaluation of performance of Flight Control System (FCS) using traditional engineering technique based on the aerodynamic model or database. To improve the evaluation accuracy, especially for the strong unsteady effect of aerodynamics, the coupling simulation technique of PID (Proportional-Integral-Differential) controller, CFD (Computational Fluid Dynamics) and RBD (Rigid Body Dynamics) is founded. The aerodynamic model in engineering technique is instead by the real-time unsteady aerodynamic forces moments in the new coupled technique including unsteady effect of aerodynamics induced by motion of vehicle and deflection of aileron. Therefore, the evaluation accuracy of flight control system can be improved.