Friday, December 2, 2005
1:00pm – 2:00pm
Professor Peretz O. Friedmann
Department of Aerospace Engineering
University of Michigan
“Active Control of Vibration and Noise an Imminent Major Improvemnt in Rotorcraft Technology”
Abstract:
A major concern in rotorcraft design is the issue of vibrations experienced in the fuselage. Similarly, the generation of noise is an important constraint on helicopter design and operation. Due to strict limitations imposed by customers and regulatory agencies active control technology has become a prime candidate for vibration and noise reduction in modern rotorcraft. Research carried out during the last fifteen years has shown that among the various strategies the actively controlled partial span trailing edge flap (ACF) has the highest potential for alleviating vibrations and noise. In the seminar research consisting of sophisticated computational aeroelastic simulation will be described and compared with available experimental data. This research is currently implemented in full-scale flight tests on a BK 117/EC 145, flown by Eurocopter Germany, to demonstrate active vibration and noise reduction.