采用光纤传感测量的直升机旋翼桨叶分布载荷识别

Identification of helicopter rotor blade distributed loads by using fiber optic sensor measurement

针对直升机旋翼载荷识别的传统技术具有测量信/噪比低、不易分布式识别等缺点,基于光纤传感测量技术,建立了一种新的旋翼桨叶分布载荷识别方法。首先建立了基于分布测量应变和模态分析的旋翼桨叶分布载荷识别理论,然后进行了悬停状态下模型旋翼桨叶的光纤传感测量,最后应用建立的识别理论,识别出了模型旋翼桨叶沿径向分布的载荷。

To overcome the shortcomings of low signal/noise ratio and difficulties to identify distributed loads by using the traditional techniques, a new method for identification of helicopter rotor distributed loads has been established, based on the fiber optic sensor measurement technology, in this paper. Firstly, the theory of identification of rotor blade distributed loads was established, based on the measurement of distributed strain and modal analysis. Secondly, the rotor blade model measurement in hover by using fiber optic sensor was carried out. Finally, the distributed loads along the radial of rotor blade were identified by using the established theory.