국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Constellation Program Electrical Ground Support Equipment Research and Development
저자	McCoy, Keegan S.
Keyword	CONSTELLATION PROGRAM;; EDUCATION;; ELECTRIC EQUIPMENT;; GROUND BASED CONTROL;; GROUND SUPPORT EQUIPMENT;; SYNCHRONISM;; TIME SYNCHRONIZATION;; VIBRATION
URL	http://hdl.handle.net/2060/20110001576
보고서번호	KSC-2010-106
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	At the Kennedy Space Center, I engaged in the research and development of electrical ground support equipment for NASA''s Constellation Program. Timing characteristics playa crucial role in ground support communications. Latency and jitter are two problems that must be understood so that communications are timely and consistent within the Kennedy Ground Control System (KGCS). I conducted latency and jitter tests using Alien-Bradley programmable logic controllers (PLCs) so that these two intrinsic network properties can be reduced. Time stamping and clock synchronization also play significant roles in launch processing and operations. Using RSLogix 5000 project files and Wireshark network protocol analyzing software, I verified master/slave PLC Ethernet module clock synchronization, master/slave IEEE 1588 communications, and time stamping capabilities. All of the timing and synchronization test results are useful in assessing the current KGCS operational level and determining improvements for the future.