基于光纤光栅的直升机桨叶应变试飞研究  

Flight test technique for helicopter blade strain measurements based on fiber bragg grating

作　　者：程卫真[1] 

机构地区：[1]中国飞行试验研究院飞机所,西安710089

出　　处：《应用力学学报》2016年第3期466-471,549,共6页Chinese Journal of Applied Mechanics

摘　　要：研制了基于光纤布拉格光栅(FBG)传感原理的光纤光栅应变机载测试系统,并应用于直升机旋翼桨叶的外场试飞测试,使直升机桨叶应变试飞实现了光学传感。首先基于等强度梁开展电学应变计与FBG应变计的对比测试,验证了两者测量应变的一致性;其次搭建桨叶运动姿态物理仿真平台,并开展基于模拟桨叶的FBG挥舞弯曲应变测试,初步验证了FBG应用于桨叶应变测试的可行性;最后在直升机飞行试验中,使用FBG网络动态测量桨叶多剖面的分布式挥舞弯曲应变,并分析和对比电学应变计与FBG传感器阵列的实测数据,验证了分布式FBG网络应用于直升机桨叶试飞的技术可行性。An airborne strain measurement system based on fiber bragg grating(FBG) sensing technology is developed and applied to measure the distributed strain on helicopter blades during the flight tests, and innovations of helicopter blade strength tests from electrical sensing to optical sensing are made. Firstly, comparison test of electrical and FBG strain gauge is done on an equal-strength beam, and the consistency of both technologies in strain measurement is verified. Secondly, strain tests of blade flapping by using FBGs are carried out on a self-made blade motion simulation platform, and the feasibility of applying FBG to blade strain test is preliminarily verified. Lastly, field flight tests are implemented in atmospheric environment, and strain data of blade flapping by using electrical gauge and FBG array are compared and analyzed, and the feasibility of applying distributed FBG network to the flight test of helicopter blade strain is verified.

关 键 词：光纤光栅应变 桨叶应变 飞行试验 直升机 

分 类 号：V217[航空宇航科学与技术—航空宇航推进理论与工程]