Accession Number:

AD0608850

Title:

ELASTIC MODE EFFECTS ON THE DYNAMICS OF A DELTA-WINGED AIRCRAFT.

Descriptive Note:

Final rept. for May-Sep 63,

Corporate Author:

AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OHIO CONTROL CRITERIA BRANCH

Personal Author(s):

Report Date:

1963-10-01

Pagination or Media Count:

20.0

Abstract:

An examination is made of some effects of rigid bodyelastic mode coupling on the longitudinal dynamics of a highly flexible delta-winged aircraft. In particular, the influence of the coupling on the automatic control systems ability to provide preselected short-period dynamics is investigated. Also, a brief check is made of the sensitivity of the dynamics to small errors in elastic mode shape. The coupling is shown to be quite severe, precluding the establishment of ballpark control element gain values with only a rigid-body dynamic analysis. In addition, very high accuracy is needed in determining elastic mode shapes, since the strong coupling renders the dynamics objectionably sensitive to small errors in elastic mode shape data. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE