模型旋翼风洞试验中变距拉杆载荷的测量

桨叶变距拉杆操纵载荷是旋翼设计的重要参数之一。在参考了常规飞机模型风洞试验测力元件及国外测量方法的基础上,研制了具有足够刚度和强度,且有较高载荷灵敏度的新式变距拉杆测力元件,解决了高刚度与高的载荷灵敏度要求这一矛盾。同时采用了信号放大技术,将其成功地应用于旋翼模型试验,并获得了操纵载荷这一重要参数

The measurement of pitch link loads in model rotor wind tunnel test

The pitch link loads of blade is one of the most important parameters in rotor design. On the base of the measurement cells of conventional airplane test in wind tunnel and measurement methods of other countries, we developed a new pitch link cell which had enough stiffness,strength and high sensitivity for loads.At the meantime,we adopted the pre amplifier of signals.The tests were carried out in diameter 4m helicopter test rig. The results show that the design of pitch link cell settled up the conflict between high stiffness and low load,increased the output of signals and the capibility of resisting interference caused by surrounding conditions.The introducing of pre amplifier of signals made it be sure in test safe and data quality.This method made a success of applying to model rotor tests and achieved the important measurement value of pitch link loads.