Flight Dynamics and Control of Elastic Hypersonic Vehicles Uncertainty ModelingIt has been shown previously that hypersonic air-breathing aircraft exhibit strong aeroelastic/aeropropulsive dynamic interactions. To investigate these, especially from the perspective of the vehicle dynamics and control, analytical expressions for key stability derivatives were derived, and an analysis of the dynamics was performed. In this paper, the important issue of model uncertainty, and the appropriate forms for representing this uncertainty, is addressed. It is shown that the methods suggested in the literature for analyzing the robustness of multivariable feedback systems, which as a prerequisite to their application assume particular forms of model uncertainty, can be difficult to apply on real atmospheric flight vehicles. Also, the extent to which available methods are conservative is demonstrated for this class of vehicle dynamics.
Document ID
19970002971
Acquisition Source
Langley Research Center
Document Type
Contractor Report (CR)
Authors
Chavez, Frank R. (Maryland Univ. College Park, MD United States)
Schmidt, David K. (Maryland Univ. College Park, MD United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1994
Publication Information
Publisher: American Inst. of Aeronautics and Astronautics