Affiliation:
1. Mechanical & Aerospace Engineering Dept. University of Rome “La Sapienza” Via Eudossiana 18, 00184 Rome, Italy
2. Department of Engineering Roma Tre University Via della Vasca Navale 79, 00146 Rome, Italy
Abstract
The present work deals with a methodology for the alleviation of loads and corresponding emitted noise generated by blade-vortex interaction (BVI) phenomena occurring on helicopter main rotors in low-speed, descent flight. It consists of a multi-cyclic, optimal control approach driving higher harmonic blade pitch actuation. First, for the specific flight condition to be examined, the BVI phenomena are simulated as equivalent two-dimensional, multi-vortex, parallel BVI problems and then a local controller methodology is applied for the efficient identification of the closed-loop control algorithm. In order to assess the capability of the proposed control approach to alleviate rotor blade loads and emitted noise, the results of a numerical investigation concerning a realistic helicopter main rotor in descent flight are presented and discussed.
Subject
Acoustics and Ultrasonics,Aerospace Engineering
Cited by
5 articles.
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