作者
Han Zhang, Xuefeng Chen, Zhaohui Du, Boyuan Yang
发表日期
2017/9/15
期刊
Mechanical Systems and Signal Processing
卷号
94
页码范围
499-524
出版商
Academic Press
简介
It is a challenging problem to design excellent dictionaries to sparsely represent diverse fault information and simultaneously discriminate different fault sources. Therefore, this paper describes and analyzes a novel multiple feature recognition framework which incorporates the tight frame learning technique with an adaptive subspace recognition strategy. The proposed framework consists of four stages. Firstly, by introducing the tight frame constraint into the popular dictionary learning model, the proposed tight frame learning model could be formulated as a nonconvex optimization problem which can be solved by alternatively implementing hard thresholding operation and singular value decomposition. Secondly, the noises are effectively eliminated through transform sparse coding techniques. Thirdly, the denoised signal is decoupled into discriminative feature subspaces by each tight frame filter. Finally, in …
引用总数
20172018201920202021202220233473741
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