RANNTAC: Reduction of aircraft noise by nacelle treatment and active control

• Research unit: EU RFP
• Project number: 97.0515-2

Key words (English)

Piezoelectric; actuator; noise control

Alternative project number (English)

EU project number: CT97-0497

Research programs (English)

EU-programme: 4. Frame Research Programme - 2.1 Industrial and materials technologies

Short description (English)

See abstract

Partners and International Organizations (English)

Coordinator: Aerospatiale (F)

Abstract (English)

During this research period, our activities were focused on a detailed characterization of disk bender actuators for vibration and noise control. A disk bender consists of two quite thin piezoelectric disks glued together by a conductive very thin passive layer. Actuators of different size were fabricated at LC-EPFL and their properties were compared to that of similar commercial actuators. In particular, we explored and demonstrated a possibility to reduce the fabrication costs and to improve actuator characteristics. Properties such as displacement-field hysteresis, blocking force, and resonance, which are relevant for active control applications, were studied in detail
A Finite-Element program for piezoelectric actuator modeling was purchased and was used to map the 'displacement-force' properties as a function of the disk-bender dimensions.

References in databases (English)

Swiss Database: Euro-DB of the
State Secretariat for Education and Research
Hallwylstrasse 4
CH-3003 Berne, Switzerland
Tel. [phone]
Swiss Project-Number: 97.0515-2