Title page for ETD etd-06162009-063023

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
  • Airplanes
Date of Defense 1993-12-05
Availability restricted

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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