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Use of quaternions in flight mechanics by Hankey, Wilbur L., is a nonfiction available to read on EtoBox.

What is Use of quaternions in flight mechanics about?

In analyzing aircraft spin and other flight maneuvers with large rotation rates based upon first principles, the non-linear aerodynamic equations (Navier-Stokes) must be coupled with the rigid-body dynamic equations of motion. In both systems of equations it is desirable to use a body axes system to describe the forces and moments, and utilize a surface-oriented coordinate system for obtaining the flowfield grid. To solve this system of equations it is necessary to describe the position of the aircraft with respect to a fixed inertial coordinate system. The classic method is to use the Euler angles to define the aircraft orientation. However, singularities and ambiguities exist when the elevation angle is plus or minus ninety degrees. This difficulty has been overcome in the field of inertial guidance by the use of quaternions to describe the aircraft position in space. It is the purpose of this report to investigate this technique for numerically solving aircraft spin problems. Two problems are addressed; the first is a nonsymmetric body and the second is a symmetric configuration. The rotational dynamics and the solution for the quaternions and Euler angles are determined for bot

Who reads Use of quaternions in flight mechanics?

Author

Hankey, Wilbur L.,

Publisher

Flight Dynamics Laboratory, Air Force Wright Aeronautical Laboratories, Air Force Systems Command, United States Air Force, 1984.

Published

1984

Language

EN

Category

nonfiction