Ureka—A Vibration Balancing Device for Helicopters
Abstract: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.
Document Type: Research Article
Affiliations: The Boeing Company, Vertol Division, Morton, Pennsylvania
Publication date: 1966-01-01
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