面向航空发动机的高精高频动应变测量系统  

A High-Precision and High-Frequency Dynamic Strain Measurement System for Aeroengine

作　　者：刘繄[1] 温志勋[2] 杨彩霞 李志强 郭煜恩 管昕 LIU Yi;WEN Zhixun;YANG Caixia;LI Zhiqiang;GUO Yuen;GUAN Xin(School of Mechamical and Eletrical Engineering,Wuhan Univenity of Techmology,Wuhun 430070,Ching;School of Mechamies,Civil Engineering and Architectute,Northresem Polytechnical Univenity,Xi'an 710129,China)

机构地区：[1]武汉理工大学机电工程学院,湖北武汉430070 [2]西北工业大学力学与土木建筑学院,陕西西安710129

出　　处：《测控技术》2024年第1期63-69,共7页Measurement & Control Technology

基　　金：“两机”专项基础研究(2017-V-0003-0052,2017-IV-0003-0040)。

摘　　要：高速高精动应变监测技术是实现航空发动机旋转部件故障早期诊断目标的关键技术。提出了一种基于相位解调技术的光纤法布里-珀罗(Fabry-Pérot,F-P)动应变测量系统,实现了在高频率条件下的高精度动应变测量。实验结果表明:系统中F-P传感器对应变的灵敏度可以达到100.955 pm/με,约为一般光纤FBG应变传感器(应变约1 pm/με)的100倍;测量频率可以达到10 kHz;在对多种不同标准激振频率进行测量时,误差不超过1.1%;另外测量系统探头能耐受1200℃的高温,因而在未来航空发动机旋转部件故障监测、性能测试方面都具有较好的应用前景。High-speed and high-precision dynamic strain monitoring technology is a key technology to realize the early fault diagnosis of the rotating parts of aeroengine.An optical fiber F-P (Fabry-Pérot)dynamic strain monitoring system based on phase demodulation method is proposed.The experimental results show that the strain sensitivity of F-P sensors in the system can reach 100.955 pm/με,approximately 100 times that of the general optical FBG strain sensor(about 1 pm/με).The measuring frequency can reach 10 kHz.The error is less than 1.1% for different vibration frequencies.Additionally,the probe of the measurement system can tolerate 1 200 ℃,so it has good application prospects in the fault monitoring,performance testing of the rotating parts of the aviation engine in the future.

关 键 词：航空发动机 高精度 高频率 动应变 光纤F-P传感器 

分 类 号：V263.6[航空宇航科学与技术—航空宇航制造工程]