机械振动信号压缩采集重构算法性能研究
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兰州理工大学机电工程学院 兰州 730050

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TH17; TN98

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国家自然科学基金(51465034)资助项目


Study on the performance of reconstruction algorithm of compression acquisition for the mechanical vibration signals
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School of Mechanical and Electronic Engineering, Lanzhou University of Technology, Lanzhou 730050, China

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    摘要:

    对机械振动信号进行压缩采集能够突破奎斯特采样定理的限制,把对信号的采样变成对信息的采样,有效地解决传统采样方式产生大量数据的问题且不造成信息的损失。振动信号重构算法是这一技术中非常关键的一部分,直接影响着振动信号的重构精度。然而目前的一些典型重构算法都是普适性的,有必要对机械振动信号的恢复效果做一系统研究。对当前比较典型的4种重构算法OMP(orthogonal matching pursuit)、StOMP(stagewise orthogonal matching pursuit)、BP(basis pursuit)、GP(gradient projection)针对机械振动信号的重建进行了适应性分析,主要从重建精度和重建时间两个方面进行系统研究并进行仿真实验。仿真实验表明,OMP算法复杂度低但不适于机械振动信号的恢复;StOMP有着较快的运算速度,非常适合于求解大尺度问题;BP复杂程度高,求解速度较慢,但重构精度很高;GP具有非常快的运算速度,但重构精度较差;

    Abstract:

    The compression acquisition of mechanical vibration signals can break through the limitation of ShannonNyquist sampling theorem, this method will turn sampling of the signal into the sampling of the information, which effectively solve the problem of traditional sampling methods to generate huge amounts of data as well as does not cause the loss of information. Reconstruction algorithm for vibration signal is a very important part of this technology, it directly affect the reconstruction accuracy of the vibration signal. However, some present typical reconstruction algorithms are universal, it is necessary to do a systematic research on the recovery effect of the mechanical vibration signal. The adaptability analysis of four typical reconstruction algorithm orthogonal matching pursuit(OMP), stagewise orthogonal matching pursuit(StOMP), basis pursuit(BP), gradient projection(GP) is systematically carried out for the reconstruction of the mechanical vibration signal, mainly in two aspects of the reconstruction precision and the reconstruction time. Simulation experiments show that OMP algorithm has low complexity but it is not suitable for the recovery of mechanical vibration signal; StOMP has a faster computing speed and is very suitable for solving large scale problems; Complexity of BP is high, solving speed is slow, but the reconstruction precision is very high; GP has very fast computing speed, but the reconstruction accuracy is poor.

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郭俊锋,严栋山,雷春丽,魏兴春.机械振动信号压缩采集重构算法性能研究[J].电子测量技术,2017,40(9):180-185

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  • 在线发布日期: 2017-11-22
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