Method for diagnosing mechanical states of distribution switch on basis of EMD sample entropy and FCM
The invention discloses a method for diagnosing mechanical states of a distribution switch on the basis of empirical mode decomposition (EMD) sample entropy and fuzzy c-means clustering (FCM). The method comprises the following steps that a piezoelectric accelerometer is mounted near to a main shaft...
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Format | Patent |
Language | Chinese English |
Published |
06.08.2014
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Abstract | The invention discloses a method for diagnosing mechanical states of a distribution switch on the basis of empirical mode decomposition (EMD) sample entropy and fuzzy c-means clustering (FCM). The method comprises the following steps that a piezoelectric accelerometer is mounted near to a main shaft of a switch operating mechanism, and the vibration signals of the distribution switch of different mechanical states at the off and on moments are collected through a data acquisition card and a waveform display storage platform; EMD time frequency decomposition is carried out on the collected vibration signals to obtain the limited number of intrinsic mode components of different frequency and unequal bandwidths and residual error components; the sample entropies of intrinsic mode functions (IMFs) of all orders of the vibration signals of different mechanical states are calculated, and a sample entropy array is formed as the characteristic quantity of the mechanical states of the distribution switch; the sample e |
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AbstractList | The invention discloses a method for diagnosing mechanical states of a distribution switch on the basis of empirical mode decomposition (EMD) sample entropy and fuzzy c-means clustering (FCM). The method comprises the following steps that a piezoelectric accelerometer is mounted near to a main shaft of a switch operating mechanism, and the vibration signals of the distribution switch of different mechanical states at the off and on moments are collected through a data acquisition card and a waveform display storage platform; EMD time frequency decomposition is carried out on the collected vibration signals to obtain the limited number of intrinsic mode components of different frequency and unequal bandwidths and residual error components; the sample entropies of intrinsic mode functions (IMFs) of all orders of the vibration signals of different mechanical states are calculated, and a sample entropy array is formed as the characteristic quantity of the mechanical states of the distribution switch; the sample e |
Author | CHEN LICHUN CHEN XIAOPENG GUO MOUFA CHEN YONGWANG ZENG JINSHUN ZHENG PENGPENG WANG CANXING |
Author_xml | – fullname: CHEN LICHUN – fullname: CHEN YONGWANG – fullname: CHEN XIAOPENG – fullname: ZHENG PENGPENG – fullname: GUO MOUFA – fullname: ZENG JINSHUN – fullname: WANG CANXING |
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RelatedCompanies | FUZHOU UNIVERSITY STATE GRID FUJIAN JINJIANG POWER SUPPLY CO., LTD STATE GRID FUJIAN ELECTRIC POWER CO., LTD |
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Snippet | The invention discloses a method for diagnosing mechanical states of a distribution switch on the basis of empirical mode decomposition (EMD) sample entropy... |
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SubjectTerms | MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING PHYSICS TESTING |
Title | Method for diagnosing mechanical states of distribution switch on basis of EMD sample entropy and FCM |
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