Development of a Model Based Technique for Gear Diagnostics Using the Wigner-Ville Method
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Development of a Model Based Technique for Gear Diagnostics Using the Wigner-Ville Method

Development of a Model Based Technique for Gear Diagnostics Using the Wigner-Ville Method


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About the Book

Imperfections in gear tooth geometry often result from errors in the manufacturing process or excessive material wear during operation. Such faults in the gear tooth geometry can result in large vibrations in the transmission system, and, in some cases, may lead to early failure of the gear transmission system. This report presents the study of the effects of imperfection in gear tooth geometry on the dynamic characteristics of a gear transmission system. The faults in the gear tooth geometry are modeled numerically as the deviation of the tooth profile from its original involute geometry. The changes in gear mesh stiffness due to various profile and pattern variations are evaluated numerically. The resulting changes in the mesh stiffness are incorporated into a computer code to simulate the dynamics of the gear transmission system. A parametric study is performed to examine the sensitivity of gear tooth geometry imperfections on the vibration of a gear transmission system. The parameters variations in this study consist of the magnitude of the imperfection, the pattern of the profile variation, and the total number of teeth affected. Numerical results from the dynamic simulations are examined in both the time and the frequency domains. A joint time-frequency analysis procedure using the Wigner-Ville Distribution is also introduced to identify the location of the damaged tooth from the vibration signature. Numerical simulations of the system dynamics with gear faults were compared to experimental results. An optimal tracker was introduced to quantify the level of damage in the gear mesh system. Conclusions are drawn from the results of this numerical study. Choy, F. and Xu, A. and Polyshchuk, V. Glenn Research Center GEARS; GEAR TEETH; DYNAMIC CHARACTERISTICS; DEFECTS; MATHEMATICAL MODELS; TRANSMISSIONS (MACHINE ELEMENTS); FAULT DETECTION; GEOMETRIC ACCURACY; STIFFNESS; TIME DEPENDENCE; FREQUENCIES; SYSTEMS HEALTH MONITORING; VIBRATION EFFECTS...


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Product Details
  • ISBN-13: 9781723025266
  • Publisher: Createspace Independent Publishing Platform
  • Publisher Imprint: Createspace Independent Publishing Platform
  • Height: 279 mm
  • No of Pages: 170
  • Spine Width: 9 mm
  • Width: 216 mm
  • ISBN-10: 1723025267
  • Publisher Date: 17 Jul 2018
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 408 gr


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Development of a Model Based Technique for Gear Diagnostics Using the Wigner-Ville Method
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