一种基于TwIST稀疏正则化的冲击载荷识别方法

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中图分类号：0347.1 文献标志码：A 文章编号：1671-5276（2025）03-0126-06

AMethod forImpactLoadIdentificationBasedon TwIST Sparse Regularization

YUAN Zhefeng，MIAO Bingrong， ZHANG Ying，JIN Yuehao，YIN Zhaoke，HU Tianqi （State Key Laboratory of Rail Transit Vehicle System，Southwest Jiaotong University，Chengdu 61OO31，China） Abstract：Inviewofthelowacuracyinimpactload identification，anewmethod forimpactloadrecognition basedonsparse regularizationmethodand Two-step Iterative Shrinkage Thresholding（TwIST）algorithmisproposed.Thesparseregularization methodisusedtoconstructtheimpactloadidentificationmodelandtheimpactloadissolvediterativelybytheTwISTalgorithm. Theproposedmethod isvalidated through impactload identification experimentsonaluminumalloybeams.Theresultsshowthat the TwISTsparseregularizationmethodcanaccuratelyidentifyimpactloadsinboth single-sourceandmulti-sourceimpactload conditions，and the proposed method，comaredwith the traditional Tikhonovregularization metod，exhibits beteraccuracy， stability，and noise resistance inload identification.

Keywords：impact load identification；sparse regularization；TwIST；inverse problem

0 引言

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