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Ureka—A Vibration Balancing Device for Helicopters

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A vibration balancing principle presently finding application in a number of commonplace situations is extended to the problem of balancing n per rev helicopter vibration. The simple principles underlying the self‐adaptive nature of the device are explained in detail, and then a particular helicopter application is considered. The nonlinear equations of motion for the helicopter application are derived and solved by analog and digital means, and various modes of functioning (and malfunctioning) of the device are identified. Two models have been constructed to investigate aspects that were difficult to represent analytically, and to provide convincing evidence that the device works.
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Document Type: Research Article

Affiliations: The Boeing Company, Vertol Division, Morton, Pennsylvania

Publication date: 1966-01-01

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  • The Journal of the American Helicopter Society is the world's only scientific journal dedicated to vertical flight technology. It is a peer-reviewed technical journal published quarterly by AHS International and presents innovative papers covering the state-of-the-art in all disciplines of rotorcraft design, research and development. (Please note that AHS members receive significant discounts on articles and subscriptions.)

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    Authors can find submission guidelines and related information on the AHS website.

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