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The Develop of Fault Diagnosis of Gearbox Based on Virtual Instrument

Author: DingZhiYu
Tutor: JiZhong
School: Chongqing University
Course: Mechanical and Electronic Engineering
Keywords: Virtual instrument Gearbox Fault Diagnosis Wavelet Analysis
CLC: TH17
Type: Master's thesis
Year: 2008
Downloads: 171
Quote: 0
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Abstract


Gearbox transmission parts, has been widely used in a various types of machinery and equipment due to its complex structure, poor working conditions, the gearbox damage and frequent failure events, gearbox fault diagnosis technology has been an important part of the Device Status diagnostic techniques, research gearbox fault diagnosis has a very important practical significance. The emergence and application of virtual instrument has changed the traditional concept of the instrument, pattern and structure. This topic gearbox fault diagnostic is the combination device detection and diagnosis technology and virtual instrument technology-based, based on the research and development for the Windows platform. This paper introduces the research status of a gearbox fault diagnosis and carry out the significance of the fault diagnosis; analysis of the mechanism of the gearbox fault diagnosis; gearbox failure signal characteristics; diagnostic programs based on virtual instrument technology gearbox design . Based on the above analysis, and finally to develop a complete gearbox failure diagnostic. This paper describes the following aspects of the research and development work. (1) the use of vibration theory and experimental research gearbox tooth error, uniform wear gear, cabinet resonance, shaft imbalance typical failure for each fault features from the time domain, frequency domain and time-frequency domain analysis and judgment to determine the most accurate and efficient diagnosis program. (2) gearbox fault transient signal, so in addition to the traditional time domain, frequency domain analysis methods, using wavelet analysis and short-time Fourier transform analysis method. Fault signals and normal gearbox signal analysis and comparison to determine the best judgment of each failure characteristics, and on this basis to develop an effective gearbox fault diagnosis system. (3) applied to the development system hardware, software discussed in detail, the gearbox fault diagnostic apparatus based on virtual instrument technology developed on this basis. In order to verify the reliability and practicality of the system characteristics, and finally through the field experiment to verify the system a diagnostic method, each judge based on the experiments show that the virtual gearbox failure diagnostic is to promote the use of a gearbox failure diagnostic. It will not only expand the diagnostic instrument development mode, and to facilitate the development of diagnostic instruments, but also to expand the application of virtual instrument technology, economic saving development costs, shorten development cycle time, the efficiency of creating greater economic and social benefits, and is of great significance.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical operation and maintenance
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