Parameter Estimation of the SR-71 Fuselage Dynamics Using an Additive Beam Model. Meeting Paper AIAA-1998-1730, Research Engineering, NASA Dryden Flight Research Center

Iorio, Carla and Lind, Rick (1998) Parameter Estimation of the SR-71 Fuselage Dynamics Using an Additive Beam Model. Meeting Paper AIAA-1998-1730, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

This paper introduces flexible dynamics into the equations of motion for an SR-71 model. An additive beam describes the elastic mode shape by superimposing multiple uniform beams so as to account for varying fuselage stiffness. The aerodynamic lift and moment coefficients are formulated to account for the dynamics of the elastic mode in the equations of motion. The resulting nonlinear aerodynamic coefficient functions are determined along with rigid body and structural terms by a parameter estimation algorithm operating on flight data. Simulated responses of this model to pilot stick inputs closely match measured flight data responses.

EPrint Type:	Other
Keywords:	SR-71 aircraft
Subjects:	Aircraft/Project: SR-71 Blackbird
ID Code:	1294
Deposited On:	08 Febuary 2007
Additional Information:	10 pages. AIAA/ASME/ASCE/AHS/ASC 39th Structures, Structural Dynamics, and Materials Conference, and AIAA/ASME/AHS Adaptive Structures Forum, Long Beach, California, April 20-23, 1998.