应用FBG传感器表征旋翼桨叶结构载荷，设计FBG传感网络及其机载测量系统用于旋翼桨叶结构载荷飞行实测。在试飞工程中，基于FBG传感器差分信号，提出易于工程实现的载荷校准试验方法，分析给出载荷测量误差优于5%的实测工程要求。将FBG传感飞行实测结果与应变计测量结果对比，表明旋翼桨叶结构载荷FBG传感同步动态飞行实测技术的可行性,为开展基于FBG传感的直升机强度试飞积累经验。
The application of FBG sensors to characterize the structural loads of rotor blades was studied. An FBG sensor network and its airborne measurement system were designed for the in-flight measurement of rotor blade structural loads. During the flight test, a calibration test method for rotor blade structural loads based on the differential signals of FBG sensors was proposed, which is easy to implement in engineering. The engineering solution with a load measurement error better than 5% was analyzed and given. The in-flight measurement results of FBG sensors were compared with those of strain gauges, indicating the feasibility of the synchronous dynamic in-flight measurement technology of rotor blade structural loads using FBG sensors.
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