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A piloted simulation of the backup control system engagement for the YAH-64A piloted simulator experiment, designed to evaluate and optimize certain backup control system (BUCS) engagement parameters and to provide pilot familiarization with aircraft response prior to flight test of the BUCS in the YAH-64 Advanced Attack Helicopter, is described. Key elements of the simulation were the representation of a control system jam, the pilot's breaking of a shear pin in the jammed control, and the resultant BUCS engagement. To minimize the excursions in aircraft motion which could result from the pilot's control inputs after shear pin breakage, the BUCS control function is blended in gradually. The experiment's results indicate that optimum time to full control authority after shear pin breakage is three seconds in all axes for certain critical tasks. Special pilot training in the recovery from a control system jam may be necessary to minimize unacceptably large aircraft transients in the off-axis.
Document ID
19810062242
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Blanken, C. L.
(Army Research and Technology Labs. Moffett Field, CA, United States)
Aiken, E. W.
(Army Research and Technology Labs. Moffett Field, CA, United States)
Merrill, R. K.
(U.S. Army, Aeromechanics Laboratory, Moffett Field CA, United States)
Ross, V. L.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
Aircraft Stability And Control
Meeting Information
Meeting: Annual Forum
Location: New Orleans, LA
Start Date: May 17, 1981
End Date: May 20, 1981
Sponsors: American Helicopter Society
Accession Number
81A46646
Distribution Limits
Public
Copyright
Other

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