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风洞虚拟飞行试验是把飞行器模型安装在风洞中具有三个转动自由度的专用支撑装置上,让三个角位移可以自由转动或者按照飞行器的飞行要求实时操纵控制舵面,来实现较为逼真的模拟飞行器真实机动运动过程,进而达到探索其气动/运动耦合机理的目的。发展风洞虚拟飞行试验,其模拟方法是必须要解决的核心理论问题。针对某典型导弹,开展了铅垂平面内三自由度俯仰运动的开环控制和闭环控制飞行仿真模拟,分析了风洞虚拟飞行试验和真实飞行之间的主要差异及其影响,研究了风洞虚拟飞行试验的模拟方法。结果表明:对铅垂平面内的三自由度俯仰运动,采用俯仰角速度反馈的经典三回路自动驾驶仪闭环控制方式,风洞虚拟飞行试验能够较为逼真地模拟真实飞行过程。
Wind tunnel virtual flight test is to install the aircraft model in the wind tunnel with three degrees of freedom of the special support device, so that the three angular displacement can rotate freely or in accordance with the flight requirements of the aircraft real-time control of the control surface, to achieve more realistic Of the real aircraft maneuver simulation process, and thus to explore its aerodynamic / kinematic coupling mechanism. The development of wind tunnel virtual flight test, the simulation method is the core theoretical issue that must be solved. For a typical missile, the open-loop control and closed-loop control flight simulations of three degrees of freedom pitch motion in the vertical plane were carried out. The main differences and their influences between the virtual flight test of the wind tunnel and the real flight were analyzed. Virtual Flight Test Simulation Method. The results show that the virtual three-loop autopilot closed-loop control method with pitch angular velocity feedback is used to simulate the true flight process in the three-degree-of-freedom pitch motion in the vertical plane.