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Investigation of the flight mechanics simulation of a hovering helicopterThe flight mechanics simulation of a hovering helicopter is investigated by comparing the results of two different numerical models with flight test data for a hovering AH-64 Apache. The two models are the U.S. Army BEMAP and the Technion model. These nonlinear models are linearized by applying a numerical linearization procedure. The results of the linear models are compared with identification results in terms of eigenvalues, stability and control derivatives, and frequency responses. Detailed time histories of the responses of the complete nonlinear models, as a result of various pilots' inputs, are compared with flight test results. In addition the sensitivity of the models to various effects are also investigated. The results are discussed and problematic aspects of the simulation are identified.
Document ID
19930051993
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chaimovich, M.
(NASA Ames Research Center Moffett Field, CA, United States)
Rosen, A.
(NASA Ames Research Center Moffett Field, CA, United States)
Rand, O.
(Technion - Israel Inst. of Technology Haifa, United States)
Mansur, M. H.
(NASA Ames Research Center Moffett Field, CA, United States)
Tischler, M. B.
(U.S. Army, Aeroflightdynamics Directorate; NASA, Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: AHS, Annual Forum, 48th, Washington, June 3-5, 1992, Proceedings. Vol. 2 (A93-35901 14-01)
Publisher: American Helicopter Society
Subject Category
Aircraft Design, Testing And Performance
Accession Number
93A35990
Distribution Limits
Public
Copyright
Other

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