Aircraft motion sensitivity to dynamic stability derivatives

Abstract

Approved for public release; distribution unlimited. 17. DISTRIBUTION STATEMENT (ol lhe abef/enct entered In Block 20, il dltleremt Item RepotQ 18 SUPPLEMENTARY NOTES Available in Defense Technical Information Center (DTIC) 19. KEY WORDS (C~t~ue ~ reverie IJde it neceaea~ ~d I~nrl~ ~ block numbe~ dynamics attack aircraft mathematical models stability fighter bombers angle of attack aircraft simulation maneuverability motion mathematical analysis damping 20. ABSTRACT (Coil/nun oN reverie side |f nnceaeery amd fdentlly by block number) A six-degree-of-freedom, nonlinear dynamic derivative sensitivity study has been conducted on a fighter/bomber and an attack-type aircraft. The dynamic derivatives investigated in the study were C~q, Cnq, Cmp, Cm r, C~, and Cn~'. For the cross-coupling derivatives, C~q was shown to have the the most significant effect on level and-3-g turning flight motion, followed by Cnq and Cmp with FORM DD , JAN T3 1473 EO, TION OF , NOV SS IS OBSOLETS UNCLASSIFIED UNCLASSIFIED 20. ABSTRACT (Continued) the derivative Cmr showing little to negligible effect in the same regime. For the acceleration derivatives, C~ was shown to have a significant influence on the aircraft motion. The Cn~ derivative had little effect on the simulated motion. The analysis also documents the configuration dependency of the cross-coupling derivatives and investigates the effects of nonlinear variations in the derivatives on the aircraft motion.

A Static Stability Analysis Method for Passively Stabilized Sounding Rockets

“…Another assumption often made is that there is no relation between the components of the aerodynamic moment and the aerodynamic angles defined with respect to two different planes [11], or in analytic terms, the stability derivatives of the pitching moment with respect to side-slip (c m CG β…”