국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	SCAMP: Rapid Focused Sonic Boom Waypoint Flight Planning Methods, Execution, and Results
저자	Haering, Edward A., Jr.;; Cliatt, Larry J., II;; Delaney, Michael M., Jr.;; Plotkin, Kenneth J.;; Maglieri, Domenic J.;; Brown, Jacob C.
Keyword	ELEVATION ANGLE;; FLIGHT PLANS;; GLIDERS;; POSITION (LOCATION); SONIC BOOMS;; SUPERSONIC AIRCRAFT;; TRAJECTORIES
URL	http://hdl.handle.net/2060/20130003184
보고서번호	DFRC-E-DAA-TN6916
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Successful *****ution of the flight phase of the Superboom Caustic Analysis and Measurement Project (SCAMP) required accurate placement of focused sonic booms on an array of prepositioned ground sensors. While the array was spread over a 10,000-ft-long area, this is a relatively small region when considering the speed of a supersonic aircraft and sonic boom ray path variability due to shifting atmospheric conditions and aircraft trajectories. Another requirement of the project was to determine the proper position for a microphone-equipped motorized glider to intercept the sonic boom caustic, adding critical timing to the constraints. Variability in several inputs to these calculations caused some shifts of the focus away from the optimal location. Reports of the sonic booms heard by persons positioned amongst the array were used to shift the focus closer to the optimal location for subsequent passes. This paper describes the methods and computations used to place the focused sonic boom on the SCAMP array and gives recommendations for their accurate placement by future quiet supersonic aircraft. For the SCAMP flights, 67% of the foci were placed on the ground array with measured positions within a few thousand feet of computed positions. Among those foci with large caustic elevation angles, 96% of foci were placed on the array, and measured positions were within a few hundred feet of computed positions. The motorized glider captured sonic booms on 59% of the passes when the instrumentation was operating properly.