发明名称 |
Method and system for ascertaining anomalies in electric motors |
摘要 |
A computer-based system and method for ascertaining anomalies in an electric motor, includes computing and processing a set of Fast Fourier Transforms (FFT's) of the supply current waveforms for a motor known to be in a normal condition to create a feature set of input vectors. The input vector assignments for all possible cluster groupings 1 through n are derived using Ward's method. The method includes computing the Approximate Weight of Evidence (AWE) for each cluster grouping then selecting that count associated with a maximum AWE and designating this count as s. For each cluster in each grouping 1 through s, the method finds the member vector farthest from the cluster's centroid and defines this as the cluster's radius. A single input sample for a motor under supervision is read in, following by computing and processing an FFT based on the input sample for a newly generated feature vector and then checking whether the newly generated feature vector is inside any of the clusters 1 through s as defined for each cluster by its respective radius, and if not, outputting a warning signal.
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申请公布号 |
US6006170(A) |
申请公布日期 |
1999.12.21 |
申请号 |
US19970937197 |
申请日期 |
1997.09.25 |
申请人 |
SIEMENS CORPORATE RESEARCH, INC. |
发明人 |
MARCANTONIO, ANGELO R.;HANSON, STEPHEN J.;PETSCHE, THOMAS |
分类号 |
G01R31/34;(IPC1-7):G01R23/00 |
主分类号 |
G01R31/34 |
代理机构 |
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主权项 |
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地址 |
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