Evaluation of the Keyspares Sparing Model Used for the Proposed Space Station.
Abstract
The purpose of this study was to evaluate the Keyspares sparing model used to calculate on-orbit spares for the proposed Space Station. The study had five basic objectives: 1. Present and describe the Keyspares' sparing model and its assumptions. 2. Locate, analyze and discuss the theoretical literature that either supports or refutes the Keyspares' assumptions. 3. Produce a simulation of on-board failures and resupply of the Space Station's Electrical Power Unit (EPU) system. 4. Run the simulation using Keyspares' assumption of a constant Orbital Replaceable Unit (ORU) failure rate and compare the simulation results with recommended ORU stockage policies of the Keyspares model. 5. Run the simulation again while the ORU failure rate distributions, and determine the differences resulting from each variation. The study found that the Keyspares model underestimates the number of spares required to maintain the Space Station's EPU system continuously operational, and recommends that further analysis of the Space Station's sparing requirements and improvements in simulating the Space Station environment be conducted. Keywords: Space logistics, Space station support simulation, Supply support, Theses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1988
- Accession Number
- ADA202630
Entities
People
- Timothy I. Mills
Organizations
- Air Force Institute of Technology