A critical comparison between DWT and Hilbert-Huang-based methods for the diagnosis of rotor bar failures in induction machines
| Autor: | R.B. Perez, Jose A. Antonino-Daviu, Manuel Pineda-Sanchez, M. Riera-Guasp |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Discrete wavelet transform
0209 industrial biotechnology Engineering 02 engineering and technology Wavelet analysis Industrial and Manufacturing Engineering Hilbert–Huang transform law.invention symbols.namesake 020901 industrial engineering & automation Wavelet Startup transient law 0202 electrical engineering electronic engineering information engineering Electronic engineering Electrical and Electronic Engineering Fault diagnosis Rotor asymmetries Signal processing business.industry Rotor (electric) 020208 electrical & electronic engineering Wavelet transform Hilbert-Huang transform (HHT) Fourier transform Control and Systems Engineering symbols INGENIERIA ELECTRICA Transient (oscillation) business Algorithm |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| Popis: | [EN] In this paper, a cutting-edge time-frequency decomposition tool, i.e., the Hilbert-Huang transform (HHT), is applied to the stator startup current to diagnose the presence of rotor asymmetries in induction machines. The objective is to extract the evolution during the startup transient of the left sideband harmonic (LSH) caused by the asymmetry, which constitutes a reliable evidence of the presence of the fault. The validity of the diagnosis methodology is assessed through several tests developed using real experimental signals. Moreover, in this paper, an analytical comparison with an alternative time-frequency decomposition tool, i.e., the discrete wavelet transform (DWT), is carried out. This tool was applied in previous works to the transient extraction of fault-related components, with satisfactory results, even in cases in which the classical Fourier approach does not lead to correct results. The results of the application of the HHT and DWT are analyzed and compared, obtaining novel conclusions about their respective suitability for the transient extraction of asymmetry-related components, as well as the equivalence, with regard to the LSH extraction, between their basic components, namely: 1) intrinsic mode function, for the HHT, and 2) approximation signal for the DWT. This work was supported in part by the Spanish “Ministerio de Educación y Ciencia,” in the framework of the “Programa Nacional de proyectos de Investigación Fundamental,” project reference DPI2008-06583/DPI and in part by “Vicerrectorado de Investigación, Desarrollo e Innovación of the Universidad Politécnica de Valencia” through the Programa de Apoyo a la Investigación y Desarrollo under Contract PAID-06-07. |
| Databáze: | OpenAIRE |
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