국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	AUTOMATED TESTING EXPERIENCE OF THE LINEAR AEROSPIKE SR-71 EXPERIMENT (LASRE) CONTROLLER
저자	Richard R. Larson
Keyword	Aerospike engine; Automated software testing; Controller architecture; LASRE; Real time analysis; SR-71 experiment
URL	http://www.dfrc.nasa.gov/DTRS/1999/PDF/H-2380.pdf
보고서번호	NASA-TM-1999-206588
발행년도	1999
출처	NASA Dryden Flight Research Center
ABSTRACT	System controllers must be fail-safe, low cost, flexible to software changes, able to output health and status words, and permit rapid retest qualification. The system controller designed and tested for the aerospike engine program was an attempt to meet these requirements. This paper describes (1) the aerospike controller design, (2) the automated simulation testing techniques, and (3) the real time monitoring data visualization structure. Controller cost was minimized by design of a single-string system that used an off-the-shelf 486 central processing unit (CPU). A linked-list architecture, with states (nodes) defined in a user-friendly state table, accomplished software changes to the controller. Proven to be fail-safe, this system reported the abort cause and automatically reverted to a safe condition for any first failure. A real time simulation and test system automated the software checkout and retest requirements. A program requirement to decode all abort causes in real time during all ground and flight tests assured the safety of flight decisions and the proper execution of mission rules. The design also included health and status words, and provided a real time analysis interpretation for all health and status data.