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The rotor BISECTIONS information fusion fault diagnosis research

Author: LiLiJuan
Tutor: HaoWei；DongXin
School: Zhengzhou University
Course: Mechanical and Electronic Engineering
Keywords: Dual -sectional information fusion Fault Diagnosis Vector spectrum Power spectrum Wavelet Packet
CLC: TH165.3
Type: Master's thesis
Year: 2009
Downloads: 18
Quote: 0
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Abstract


Rotating machinery with the progress of the development of science and technology, more and more complicated, and the analysis and diagnosis of them will put forward the ever-increasing demands. However, analysis of the current diagnostic tools are still stuck in the analysis of the rotor system with a single-section information, while ignoring the organic link between the various sections of the rotor. Therefore, it can not fully describe the overall dynamic information, would be unable to make an accurate judgment on failure. In order to solve this problem, more complete testing on equipment operation and a more accurate judgment of the fault, this paper focuses on research and explore a the rotor BISECTIONS information fusion method and its application in fault diagnosis. Rotor single-section information fusion theoretical basis, and given a numerical algorithm and map expression, and through the analysis of specific examples, discussed the characteristics of the full vector spectrum analysis technique for the next rotor BISECTIONS information fusion research and lay foundation. The combined rotor dynamics of knowledge and full knowledge of vector spectrum, numerical algorithms and map expression of fusion research the rotor BISECTIONS information. Modes of the rotor space after fusion research, to identify the link between the two sections, and take advantage of the integration of the rotor space modal analysis part of the fault characteristics. Finally, the full vector spectrum theory combined with the early phase and spatial modes applied to the misalignment of rotating machinery fault classification. Rotor dual sectional data layer information effective integration into the overall detection and accurate fault diagnosis of the rotor to provide more effective, more comprehensive information. Signal power spectrum analysis theory as well as vector power spectrum of the definition, nature, the basis of the traditional vector power spectrum, combined with knowledge of rotor dynamics proposed information fusion method based on the dual-section of the power spectrum of the full vector correctness and verified by experiment. The study showed that based on the integration of the power spectrum of the double-section information fusion to improve the traditional single-section signal information is incomplete, reflect sided defects, consider a more comprehensive and objective understanding and grasp the actual running state of the rotor has important research value and a wide range of engineering significance. Dual-sectional information fusion full vector spectrum technology and wavelet packet basis wavelet packet technology, the technology both play the advantages of the weak frequency components extracted wavelet packet analysis, fusion the rotor BISECTIONS homologous information to ensure that the the integrity of the results of the diagnostic information can also be directly troubleshooting, processing of non-stationary signals an accurate and reliable method. Research the rotor BISECTIONS information fusion more real reaction characteristics of the rotor system running more fully take advantage of, information and diagnostic results are more accurate and reliable, with high theoretical value and the value of engineering applications.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Machinery Manufacturing Technology > Flexible manufacturing systems and flexible manufacturing cell > Fault diagnosis and maintenance
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