ELASTIC MODE EFFECTS ON THE DYNAMICS OF A DELTA-WINGED AIRCRAFT.
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 system's 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1963
- Accession Number
- AD0608850
Entities
People
- Robert L. Swaim
Organizations
- Flight Dynamics Laboratory