Accession Number:

ADA445217

Title:

Modeling, Stability, and Control of a Rotatable Tail on a Micro Air Vehicle

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s):

Report Date:

2005-12-01

Pagination or Media Count:

131.0

Abstract:

This research uses existing experimental wind tunnel data to develop a non-linear model that is used to characterize the stability of a flexible wing Micro Air Vehicle MAV with a rotatable tail. The experimental data are curve fit based on either angle of attack or angle of sideslip, and the coupled effect of tail rotation and tail deflection on the force and moment coefficients. Static optimization trims the input and state variables for Steady Level Unaccelerated Flight SLUF. The resulting initial conditions are fed to an open loop non-linear SimulinkMatlab simulation. The study found that the bare MAV design is unstable, but parametric studies identified practical modifications that could be made to the MAV to improve its open loop stability characteristics. The study found that the coupling effect due to the dihedreal derivative played a large role in destabilizing the lateral-directional dynamics and a feedback Stability Augmentation System is required for flight.

Subject Categories:

  • Pilotless Aircraft
  • Theoretical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE