风洞动导数俯仰振动试验装置的设计

摘要

Aiming at these disadvantages of free vibration method for dynamic derivative using the existence of weak anti-interference ability, can’t control the amplitude and frequency, the forced vibration method carries on the design to the wind tunnel aerodynamic derivatives of pitching vibration test device. Using the principle of double parallel crank mechanism, by aircraft model in a wind tunnel with a given amplitude, frequency sinusoidal vibration complete the pitching motion, simulating the actual flight conditions measured dynamic derivative pitch attitude, and checked verified through examples. The results show that, the device has high strength and stiffness, can simulate the flight state more accurately, and improve the test precision.%针对动导数试验采用的自由振动法存在抗干扰能力弱，不能控制振幅和频率等缺点，采用强迫振动方法对风洞动导数俯仰振动试验装置进行设计。利用平行双曲柄机构原理，通过飞行器模型在风洞中以给定的振幅、频率完成俯仰正弦振动运动，模拟实际飞行状态测得俯仰姿态下的动导数，并通过实例进行校核验证。结果表明：该装置具有很高的强度和刚度，能更准确地模拟飞行状态，提高试验测量精度。