一种低速风洞虚拟飞行试验装置的建模与仿真

In order to realize the maneuver simulation of large angle and multi-degree-of-freedom, a three degree-of-freedom dynamic test rig, which enables simulation of the velocity vector roll and uncontrolled flight condition such as stall/departure/spin, is developed to solve the aerodynamic/motion coupling issues. The rotational motion of the three axis of the aircraft model is simulated by the combined motion of the 2-DOF gimbal. Based on multi-body dynamics theory, the dynamical equation of the curved rod and aircraft model with terms accounting for friction in the gimbals is obtained with Lagrange multiplier method. The simulation results show that, the rig can provide the ability to realize the velocity vector roll, and the rotation of the curved rod is synchronous with the rolling motion of the aircraft model. The curved rod has an effect on the dynamic response of rotational rates, while the frictional torque makes a difference on both the dynamic response and steady state value of rotational motions. The mathematical model and simulation validation provides a guide for wind tunnel test.