带升力风扇飞机的短距起飞建模和仿真研究

Modeling and Simulation of Advanced Short Takeoff Aircraft with Lift-fan

着重研究带升力风扇飞机在考虑地效时的短距起飞性能。结合地面效应在飞机起飞时的影响,气动舵面和推力矢量融合控制技术的飞机运动状态,建立了考虑地效的飞机纵向动力学数学模型。最后以某ASTOVL验证机为背景机,借助Matlab7.1/Simulink环境,对三种不同动力方案飞机的起飞过程进行仿真计算,并与飞行试验结果相比较,结果表明考虑地效时建立的数学模型具有更好的可信度;同时可以看出采取不同推力矢量动力方案对飞机起飞性能的改善有很大的差异,尤其是带升力风扇的推力矢量飞机在短距起飞性能上可以获得明显的收益。

This paper studies the takeoff performance of the propulsion system that includes lift - fan in view of ground effects. Conbined with the influences of the ground plane which occur in the takeoff phase, the syncretic control technology of aerodynamics rudder and thrust vector, an aircraft longitudinal dynamics mathematical model is established in view of ground effects. At last, based on the STOVL aircraft, the takeoff process has been simulated by Matlab7.1/Simulink, and a comparison with test data is made. As a result, the mathematical model in view of ground effects is more credible, and different power projects have different impacts on the takeoff process, and the thrust vectoring with lift -fan especially can obtain performance improvement.