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Tuesday, July 9 • 10:50 - 11:10
MESH CONDITION MONITORING FOR SPUR GEARS BY VIBRO-ACOUSTIC ADMITTANCE MODULATION OF PIEZOELECTRIC ELEMENTS ATTACHED ON THE END FACE

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In this paper, a novel mesh condition monitoring method for spur gears is presented which utilizes a nonlinear vibro-acoustic effect on a piezoelectric element integrated on the end face of the drive gear. In the presented technique, the piezoelectric element is driven by a sinusoidal voltage source with an ultrasonic frequency to excite a certain vibration mode of the drive gear. The meshing motion of the gears yields a time-varying boundary condition at the contacting point between the drive and driven gears, which leads to a fluctuation of the scattering conditions for the ultrasonic elastic wave radiated from the piezoelectric layer. This nonlinear effect of vibro-acoustic interaction appears as a modulation of the coupled electromechanical admittance of the piezoelectric element, which can be observed as an amplitude and phase modulation of the current response of the piezoelectric element. In this preliminary study, a test rig consisting of a motor-driven pair of meshing spur gears with an electromagnetic powder brake for loading is developed, and the current responses of the piezoelectric element are investigated with low speed rotation under various loading levels.

Moderators
LH

Lars Håkansson

professor, Linnaeus University
TK

Triantafillos Koukoulas

Dr, Korea Research Institute of Standards and Science

Authors

Tuesday July 9, 2019 10:50 - 11:10 EDT
Westmount 2
  T01 Ac. meas. & instrum., RS02 Measur techniq & sens