국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Implementation on Landsat Data of a Simple Cloud Mask Algorithm Developed for MODIS Land Bands
저자	Oreopoulos, Lazaros;; Wilson, Michael J.;; Varnai, Tamas
Keyword	ARES 1 LAUNCH VEHICLE;; ARES 1 UPPER STAGE;; ATTITUDE CONTROL;; COLD FLOW TESTS;; FLIGHT TESTS;; FREQUENCY RESPONSE;; PROPELLANTS;; STATIC PRESSURE;; SYSTEMS ENGINEERING;; TRAJECTORIES
URL	http://hdl.handle.net/2060/20110007275
보고서번호	M10-0946
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	The Upper Stage Reaction Control System provides three-axis attitude control for the Ares I launch vehicle during active Upper Stage flight. The system design must accommodate rapid thruster firing to maintain the proper launch trajectory and thus allow for the possibility to pulse multiple thrusters simultaneously. Rapid thruster valve closure creates an increase in static pressure, known as waterhammer, which propagates throughout the propellant system at pressures exceeding nominal design values. A series of development tests conducted in the fall of 2009 at Marshall Space Flight Center were performed using a water-flow test article to better understand fluid performance characteristics of the Upper Stage Reaction Control System. A subset of the tests examined waterhammer along with the subsequent pressure and frequency response in the flight-representative system and provided data to anchor numerical models. This thesis presents a comparison of waterhammer test results with numerical model and analytical results. An overview of the flight system, test article, modeling and analysis are also provided.