基于FBG的辊压机辊面非均匀应变分段重构研究  

Segmentation Reconstruction Study of FBG Non-uniform Strain Distribution of Roller Press Surface

作　　者：王鹏 宋春生 韩雨润 WANG Peng;SONG Chunsheng;HAN Yurun(School of Mechanical and Electrical Engineering,Wuhan University of Technology;Hubei Provincial Engineering Technology Research Center for Magnetic Suspension)

机构地区：[1]武汉理工大学机电工程学院 [2]湖北省磁悬浮工程技术研究中心

出　　处：《仪表技术与传感器》2024年第6期30-36,共7页Instrument Technique and Sensor

摘　　要：为实现对辊压机辊面内部损伤的监测,传统的重构方法不能较好地重构出结构损伤时应变局部突变的特点,文中提出了一种基于FBG传感的非均匀应变分段重构的方法。结合传输矩阵法推导了分段重构方法的可行性,改进差分进化算法对不同工况下的应变分布进行分段重构仿真与分析。结果表明:在正常工作状态下,分段与未分段重构方法都可以较好地重构非均匀应变;在损伤状态下,分段重构方法得到的应变均方根误差为4.505με,小于未分段重构方法的18.991με。说明分段重构方法具有一定的泛化能力,可以适应不同辊面工况下的非均匀应变重构。The traditional reconstruction method can not well reconstruct the characteristics of local sudden change of strain when the structure is damaged.To monitor the internal damage of roll surface,a method of segmentation reconstruction of non-uni-form strain was proposed based on FBG sensors.Combined with improved transfer matrix method,the feasibility of segmentation reconstruction method was deduced.Based on improved differential evolution algorithm,the strain distribution under different work conditions was reconstructed and analyzed by segmentation reconstruction method.The results show that under normal working conditions,both the two methods can reconstruct non-uniform strain well.While the root mean square error of the segmented re-construction method is 4.505με,which is smaller than that of the traditional method(18.991με)in the damaged state.The segmentation reconstruction method proposed has certain generalization ability and can adapt to the non-uniform strain reconstruc-tion under different working conditions.

关 键 词：光纤布拉格光栅 传输矩阵法 非均匀应变监测 应变分段重构 差分进化算法 光谱特性 

分 类 号：O433[机械工程—光学工程]