Damping of in-process measuring system through variable stiffness tunable vibration absorber

Alexander Iglesias (1) , Gorka Aguirre (1) , Jokin Munoa (1) , Zoltan Dombovari (2) , Iñaki Laka (1) , Gabor Stepan (2)

1 IK4-Ideko
2 Department of Applied Mechanics

In external cylindrical grinding machines, measuring systems are occasionally mounted on a gantry type frame. The modes of this structure are potentially harmful within the operation range of the grinding wheel in a standard machine configuration, since the rotation of the wheel can enter into resonance, thus avoiding a correct determination of the on-line measurement. The resoncance problem can be succesfully dealt with the use of a variable stiffness vibration absorber which autonomously adapts its stiffness to tune according to the mode to be damped, increasing the dynamic stiffness along the whole operation range of the wheel. In this work, a variable stiffness self-tunable vibration absorber prototype has been built and a new tuning function has been derived in order to minimize the response at the frequency coincident with the rotating speed of the wheel. Finally, validation tests have been performed in a scale supporting structure and the vibration reduction improvement comparison with respect to a standard fixed tuning strategy has been evaluated.

Domaines: Génie mécanique [physics.class-ph]; Vibrations [physics.class-ph]

Alexander Iglesias, Gorka Aguirre, Jokin Munoa, Zoltan Dombovari, Iñaki Laka, et al.. Damping of in-process measuring system through variable stiffness tunable vibration absorber. 26th International Conference on Noise and Vibration engineering (ISMA2016) in conjunction with the 5th International Conference on Uncertainty in Structural Dynamics (USD2016), Sep 2016, Leuven, Belgium. ⟨hal-01505977⟩