第60卷第2期/2023年1月/激光与光电子学进展0212001-1研究论文基于L1/L2正则化电阻抗层析成像算法的碳纤维增强复合材料损伤检测马敏*，余浪，范文茹中国民航大学电子信息与自动化学院，天津300300摘要电阻抗层析成像（EIT）为碳纤维增强复合材料（CFRP）结构健康检测提供了一种可视化检测的手段。针对EIT图像重建的欠定性和病态性，提出了一种基于L1/L2稀疏正则化的EIT图像重建算法。该算法通过构建L1/L2正则化项的目标泛函，在求解过程中加入正则化参数对解向量进行修正，并在迭代过程中加入约束区间使解向量更加贴近真实分布。仿真和实验结果表明，与共轭梯度（CGLS）算法、Tikhonov算法、L1正则化算法相比，所提L1/L2正则化算法重构的损伤位置和大小更接近真实损伤模型，损伤的辨识度更高，电极伪影得到明显改善，为EIT应用于CFRP层压板损伤检测提供了新方法。关键词测量；碳纤维增强复合材料；电阻抗层析成像；L1/L2；稀疏正则化；交替方向乘子法；损伤检测中图分类号TM932文献标志码ADOI：10.3788/LOP212643DetectionofCarbon-Fiber-ReinforcedPolymerDamageBasedonL1/L2RegularizationElectricalImpedanceTomographyAlgorithmMaMin*,YuLang,FanWenruCollegeofElectronicInformationandAutomation,CivilAviationUniversityofChina,Tianjin300300,ChinaAbstractElectricalimpedancetomography(EIT)isavisualizedmethodfordetectingthestructuralhealthofcarbon-fiber-reinforcedpolymers(CFRPs).AnEITimagereconstructionalgorithmbasedonL1/L2sparseregularizationisproposedforunderdeterminationandill-conditioninEITimagereconstruction.Inthismethod,theobjectivefunctionaloftheL1/L2regularizationtermisconstructed,aregularizationparameterisaddedtomodifythesolutionvectorduringthesolutionprocess,andaconstraintintervalisaddedintheiterativeprocesstomakethesolutionvectorclosertotheactualdistribution.Thesimulationandexperimentalresultsshowthatcomparedwiththeconjugategradient(CGLS),Tikhonov,andL1regularizationalgorithms,thedamagelocationandsizereconstructedusingtheL1/L2regularizationalgorithmareclosertotheactualdamagemodel,thedamageidentificationishigher,andtheelectrodeartifactissignificantlyimproved.TheproposedalgorithmisanewmethodforapplyingEITtothedamagedetectionofCFRPlaminates.Keywo...
