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A Novel Multidimensional Frequency Band Energy Ratio Analysis Method for the Pressure Fluctuation of Francis Turbine
المؤلفون المشاركون
Chen, Qijuan
Wang, Weiyu
Liang, Xing
Yue, Xuhui
Dou, Jinzhou
المصدر
Mathematical Problems in Engineering
العدد
المجلد 2018، العدد 2018 (31 ديسمبر/كانون الأول 2018)، ص ص. 1-10، 10ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2018-01-21
دولة النشر
مصر
عدد الصفحات
10
التخصصات الرئيسية
الملخص EN
The pressure fluctuation has multiple influence on the steady operation of Francis turbine, and the impact degree varies with the operation condition.
In this paper, for the analysis of pressure fluctuation in the Francis turbine, a novel feature extraction method of multidimensional frequency bands energy ratio is proposed based on Hilbert Huang Transform (HHT).
Firstly, the pressure fluctuation signal is decomposed into intrinsic mode functions (IMFs) by EEMD.
Secondly, the Hilbert marginal spectrum is utilized to analyze the frequency characteristics of IMFs.
Then, according to the inner frequency of IMFs, each of them is divided into high, medium, or low frequency band which are constructed based on the frequency characteristic of the pressure fluctuations in the Francis turbine.
Afterward, the energy ratio of each frequency band to the original signal is calculated, which is to realize the feature extraction of multidimensional frequency band energy ratio.
Actual applications verify that this method not only can extract the time-frequency characteristics but also can analyze the condition feature of the pressure fluctuation.
It is a novel method for extracting the feature of pressure fluctuation in the Francis turbine.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Wang, Weiyu& Chen, Qijuan& Liang, Xing& Yue, Xuhui& Dou, Jinzhou. 2018. A Novel Multidimensional Frequency Band Energy Ratio Analysis Method for the Pressure Fluctuation of Francis Turbine. Mathematical Problems in Engineering،Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1206857
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Wang, Weiyu…[et al.]. A Novel Multidimensional Frequency Band Energy Ratio Analysis Method for the Pressure Fluctuation of Francis Turbine. Mathematical Problems in Engineering No. 2018 (2018), pp.1-10.
https://search.emarefa.net/detail/BIM-1206857
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Wang, Weiyu& Chen, Qijuan& Liang, Xing& Yue, Xuhui& Dou, Jinzhou. A Novel Multidimensional Frequency Band Energy Ratio Analysis Method for the Pressure Fluctuation of Francis Turbine. Mathematical Problems in Engineering. 2018. Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1206857
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1206857
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر
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