Type of Document	Master's Thesis
Author	Honaker, David
URN	etd-06162009-063023
Title	Longitudinal axis display requirements for high speed cruise
Degree	Master of Science
Department	Aerospace Engineering
Advisory Committee	Advisor Name Title Anderson, Mark R. Committee Chair Cliff, Eugene M. Committee Member Durham, Wayne C. Committee Member
Keywords	Airplanes
Date of Defense	1993-12-05
Availability	restricted
Abstract Altitude excursions particular to high speed aircraft are investigated in this thesis. An aerodynamic database of the XB-70 is created and a longitudinal linear model is constructed for a high speed cruise flight condition. An examination of the unpiloted aircraft dynamics revealed that the excursions were not due to a poorly handling aircraft. Thus, it is theorized that the excursions are due to pilot vehicle interactions. A classical control method developed a loop closure scheme suitable for acceptable control of the aircraft. The results showed that a pilot should close an inner loop with negative attitude feedback and an outer loop with positive flight path feedback. A modern control method analysis using an optimal control pilot model confirmed the preceding conclusions. Based on these results, the cockpit pitch attitude display resolution should be less than 1° so that the pilot will be able to perform the loop closures necessary for constant altitude flight.
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