An Analysis of Lateral-Directional Handling Qualities and Eigenstructure of High Performance Aircraft.
Abstract
This thesis examines the relationship between an aircraft's lateral-directional handling qualities and its corresponding eigenstructure. Intuition and simple methematical models were used to develop desirable eigenvectors. For conventional aircraft, the dutch roll eigenvector was shown to a function of the roll to sideslip (phi/beta) ratio. Flight control laws to produce the desired eigenstructures were derived using eigenstructure assignment with output feedback. The control laws were based on a twelfth order linear model of the lateral-directional dynamics of the YA-7D DIGITAC, and varied the dutch roll phi/beta ratio. The handling qualities of the YA-7D were examined. The flight testing consisted of both open loop tasks, and closed loop tasks in which Cooper-Harper ratings were assigned.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1988
- Accession Number
- ADA194874
Entities
People
- Michael J. Costigan
Organizations
- Air Force Institute of Technology