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Erschienen in:
2023 | OriginalPaper | Buchkapitel
11. Vibration Mitigation of Bladed Structures Using Piezoelectric Digital Vibration Absorbers
verfasst von : J. Dietrich, G. Raze, A. Paknejad, A. Deraemaeker, C. Collette, G. Kerschen
Erschienen in: Special Topics in Structural Dynamics & Experimental Techniques, Volume 5
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Abstract
This work presents a novel vibration damping approach for bladed structures. Piezoelectric transducers bonded to a structure can be used simultaneously as actuators and sensors to mitigate the vibrations of their host. This can be achieved by connecting a transducer to a digital vibration absorber composed of a voltage sensor, a digital processing unit and a current injector. The digital vibration absorber thereby emulates a piezoelectric shunt. In this study, this technique is applied to bladed structures featuring small modal damping and closely spaced resonance frequencies grouped in mode families. A strategy exploiting the high modal density is presented. Effective vibration mitigation is experimentally demonstrated on multiple mode families simultaneously.