航空学报 > 2025, Vol. 46 Issue (24): 231863-231863   doi: 10.7527/S1000-6893.2025.31863

固体力学与飞行器总体设计

旋翼桨叶结构载荷光纤布拉格光栅传感试飞技术

程卫真(), 王泽峰, 耿丽松, 郑甲宏, 焦帅克, 李康   

  1. 中国飞行试验研究院,西安 710089
  • 收稿日期:2025-02-10 修回日期:2025-02-20 接受日期:2025-03-14 出版日期:2025-03-28 发布日期:2025-10-30
  • 通讯作者: 程卫真 E-mail:chengwz1972@qq.com
  • 基金资助:
    直升机动力学全国重点实验室基金(61422202104)

Flight test measurement for structural load of rotor blade based on fiber Bragg grating

Weizhen CHENG(), Zefeng WANG, Lisong GENG, Jiahong ZHENG, Shuaike JIAO, Kang LI   

  1. Chinese Flight Test Establishment,Xi’an 710089,China
  • Received:2025-02-10 Revised:2025-02-20 Accepted:2025-03-14 Online:2025-03-28 Published:2025-10-30
  • Contact: Weizhen CHENG E-mail:chengwz1972@qq.com
  • Supported by:
    National Key Laboratory Foundation of Helicopter Aeromechanics(61422202104)

摘要:

应用光纤布拉格光栅(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试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响应信息差分算法,提出获取载荷模型系数矩阵的单项加载校准试验方法,以及桨叶剖面实际安装角的确定方法。试验数据分析表明,载荷模型误差优于5%的飞行实测工程要求。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。

关键词: 直升机, 旋翼, 桨叶, 结构载荷, FBG, 飞行试验

Abstract:

Fiber Bragg Grating (FBG) sensors are used to characterize the structural loads of rotor blades. An FBG sensing network and its airborne measurement system are designed for in-flight measurement of rotor blade structural loads. In flight testing, a single-load calibration method based on the differential algorithm of FBG response information was employed to obtain the load model coefficient matrix, and a method for determining the actual installation angle of the blade section is proposed. Data analysis shows that the load model error meets the engineering requirement of less than 5% for in-flight measurement. Comparison of FBG sensing results with strain gauge measurements demonstrates the feasibility of FBG-based synchronous dynamic in-flight measurement of rotor blade structural loads, accumulating experience for helicopter strength flight tests based on FBG sensing technology.

Key words: helicopter, rotor, blade, structural loads, fiber Bragg grating, flight test

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