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기술보고서

기술보고서 게시판 내용
타이틀	Modeling the Launch Abort Vehicle''s Subsonic Aerodynamics from Free Flight Testing
저자	Hartman, Christopher L.
Keyword	AERODYNAMIC CHARACTERISTICS;; DYNAMIC PRESSURE;; DYNAMIC STABILITY;; INCOMPRESSIBLE FLOW;; LAUNCH VEHICLES;; MOMENT DISTRIBUTION;; STATIC STABILITY;; SYSTEM IDENTIFICATION;; WIND TUNNELS
URL	http://hdl.handle.net/2060/20100031104
보고서번호	NASA/CR-2010-216837
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	An investigation into the aerodynamics of the Launch Abort Vehicle for NASA''s Constellation Crew Launch Vehicle in the subsonic, incompressible flow regime was conducted in the NASA Langley 20-ft Vertical Spin Tunnel. Time histories of center of mass position and Euler Angles are captured using photogrammetry. Time histories of the wind tunnel''s airspeed and dynamic pressure are recorded as well. The primary objective of the investigation is to determine models for the aerodynamic yaw and pitch moments that provide insight into the static and dynamic stability of the vehicle. System IDentification Programs for AirCraft (SIDPAC) is used to determine the aerodynamic model structure and estimate model parameters. Aerodynamic models for the aerodynamic body Y and Z force coefficients, and the pitching and yawing moment coefficients were identified.