Computer Science – Performance
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jann.conf..567h&link_type=abstract
In JHU, The 1992 JANNAF Propulsion Meeting, Volume 1 p 567-576 (SEE N93-10001 01-20)
Computer Science
Performance
Certification, Complex Systems, Launch Vehicles, Operational Problems, Propulsion System Configurations, Propulsion System Performance, Rocket Engines, Checkout, Launch Windows, Space Maintenance, Space Shuttles, Spacecraft Launching, Spacecraft Maintenance
Scientific paper
Space-based propulsion systems, for lunar and Mars missions, will require operability to be a prime design requirement. Since the rocket engine propulsion system represents one of the most complex systems in a space-based vehicle, a study was made to identify propulsion system operational problems. This paper uses descriptions of major operations problems encountered in today's launch vehicles as a point of departure for this study. Lessons learned from the Space Shuttle, expendable launch vehicles, and satellite maintenance reveal activities that are time consuming, costly, difficult, and potentially dangerous. Operational functions are much more difficult in space, have a large impact on cost, and unscheduled operations could result in a missed launch window. Launch and satellite flight certification problems are related to projected space-based propulsion system operations issues. Space-based propulsion systems may be reusable with long periods of space exposure and storage between firings. The space-based propulsion system operability study approach is described, and tradeoffs are presented on operability. Operations driven requirements focus on minimizing or eliminating processing and checkout operations. This paper presents a concept description of a zero maintenance, space-based, integrated propulsion module system. This system is operationally efficient, minimizing operational activities. The resulting propulsion system is simpler, more reliable, has enhanced component out capability, and is more operable than a conventional unintegrated engine system.
Erickson C.
Harmon Timothy
Pauckert Ron
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