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cluster VMDaFCM casedat
为了精准、稳定地提取滚动轴承故障特征，提出了基于变分模态分解和奇异值分解的特征提取方法，采用标准模糊C均值聚类(fuzzy C means clustering, FCM)进行故障识
别。对同一负荷下的已知故障信号进行变分模态分解，利用
奇异值分解技术进一步提取各模态特征，通过FCM形成标准聚类中心，采用海明贴近度对测试样本进行分类，并通过计算分类系数和“卜均模糊嫡对分类性能进行评价，将该方法
应用于滚动轴承变负荷故障诊断。通过与基于经验模态分解的特征提取方法对比，该方法对标准FCM初始化条件小敏感，在同负荷故障诊断中表现出更好的分类性能 变负荷故障诊断时，除外圈故障特征线发生明显迁移，其他测试样本故障特征线仍在原聚类中心附近，整体故障识别率保持在100 ，因此，该方法能精确、稳定提取故障特征，为实际滚动轴承智能故障诊断提供参考。( In order to extract fault features of rolling bearing precisely and steadily, a method which is based on variational mode decomposition(VMD) and singular value
decomposition was proposed for fault diagnosis using standard
fuzzy C means clustering(FCM). First of all, the known fault signals measured in the same load but with different faults were
decomposed by VMD, and the modes characteristics were
further extracted using singular value decomposition technique,forming the standard clustering centers by FCM, and then the
test samples were clustered by a Hamming nearness approach,
and the classification performance was uated by calculating classification coefficient and average fuzzy entropy. At last, the method was applied in rolling bearing fault diagnosis under
variable loads. By comparing with a method based on EMD,
this approach is not sensitive to the initialization of standard FCM, and exhibits better classification performance in the same load fault diagnosis Fo)
- 2020-11-11 20:59:44下载
- 积分：1
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High_quality_C_programming_guide
高质量C++/C 编程指南 主要介绍了如何提高代码的执行效率,代码的结构布局,高效率代码的编写,以及C/C++中重要的部分(High-quality C++/C Programming Guide describes how to improve the efficiency of the code, the code structure and layout, efficient code writing, and the C/C++ important part in the)
- 2010-11-14 01:18:37下载
- 积分：1
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Archive
ncut algorithm matlab
- 2010-10-28 13:44:42下载
- 积分：1
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Algorithm-Guinness
利用matlab描述的算法大全，包括30种算法(Described using matlab algorithm Daquan, including 30 algorithms)
- 2012-08-24 06:09:30下载
- 积分：1
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graygrad
计算二维灰度-梯度直方图，很好用，特别好，啦啦啦(Calculate two-dimensional grayscale-gradient histogram, very good use, especially good, la la la)
- 2018-06-02 16:42:41下载
- 积分：1
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Gabor
matlab编程 基于颜色和纹理的图像检索系统(matlab programming based on the color and texture of the image retri system)
- 2015-03-19 09:51:45下载
- 积分：1
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New-Folder
dwt based watermarking and enhanced results .............
- 2012-02-06 14:43:04下载
- 积分：1
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SR_algorithm
随机共振模型是检测微弱信号，近期流行的算法，效果不错，从事微弱信号检测和提取的可看下(Stochastic resonance model is to detect weak signals, the recent popular algorithms, good effect, engage in weak signal detection and extraction can look)
- 2013-12-12 22:49:38下载
- 积分：1
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huofu
matlab中运用hough变换，设定恰当的阈值，将超过阈值的点在三维空间标示出来&将三维参数矩阵根据半径的不同做成不同的帧，制作成视频(hough transform matlab in use, set the appropriate threshold, will exceed the threshold point in three-dimensional space marked out & three-dimensional parameter matrix made of different frames depending on the radius, made into video)
- 2013-12-23 20:39:16下载
- 积分：1
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diyjuidc
有信道编码，调制，信道估计等，MIMO OFDM matlab仿真,实现了对10个数字音的识别程序在matlab R2009b调试通过，微分方程组数值解方法，对HARQ系统的吞吐量分析。( Channel coding, modulation, channel estimation, MIMO OFDM matlab simulation, Realization of 10 digital audio recognition program In matlab R2009b debugging through, Numerical solution of differential equations method, HARQ throughput analysis of the system.)
- 2016-03-15 18:59:15下载
- 积分：1
