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A Reliability Model to Assess Reliability of Shuttle Derived Launch Vehicle and Next Generation VehiclesOne important thrust in NASA s space exploration vision is to improve the safety and reliability of future launch vehicles. A quantitative reliability model is an essential technical tool to evaluate launch vehicle reliability and to enhance launch vehicle configuration down selection and detailed designs. A quantitative reliability model that supports NASA's thrust has been developed and implemented in an MS Excel spreadsheet. The model addresses key reliability parameters, and provides for sensitivity analysis of various vehicle designs. This paper presents the specific elements of the model and examples of selected sensitivity analysis results. Reliability input parameters in the model include the following: 1. Main propulsion element failure probability; 2. Propulsion element catastrophic failure fraction (Cf). This is defined as the ratio of probability of uncontained failures over sum of probability of uncontained failures and contained failures); 3. Engine-out design vs. no-engine-out design; 4. Engine with redlines vs. no redlines; 5. Different levels of health management system implementation; 6. Launch Escape System (LES) reliability; and 7. Power level correlation with reliability. The sensitivity results will illustrate the impact of each of the above parameters on several reliability metrics: Loss of Mission (LOM), LOV (Loss of Vehicle) and Loss of Crew (LOC).
Document ID
20050207449
Acquisition Source
Marshall Space Flight Center
Document Type
Abstract
Authors
Huang, Zhao
(Boeing Co. Canoga Park, CA, United States)
Kuck, Frederick
(Boeing Co. Canoga Park, CA, United States)
Fint, Jeff
(Boeing Co. Canoga Park, CA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Launch Vehicles And Launch Operations
Meeting Information
Meeting: AIAA Conference
Location: Tucson, AZ
Country: United States
Start Date: July 10, 2005
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NAS8-01140
Distribution Limits
Public
Copyright
Other

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