A Preliminary Analysis of the Effect of Work-arounds on Space System Performance and Procurement Requirements: A Proposal
This note identifies a factor that appears to have been neglected in explaining the discrepancy between predicted and observed satellite lifetimes in orbit. This factor--extension of satellite life through ingenious 'work-around' corrections--is not represented in current satellite replenishment models. The note explores the effect of this omission on various measures of system performance, develops an analytical method of incorporating these work-arounds in replenishment models, and derives an initial estimate of the required parameters from a convenient data base. Incorporating the effect of work-arounds dramatically improves system performance and lowers procurement requirements. (Author).
What people are saying - Write a review
We haven't found any reviews in the usual places.
13-SATELLITE 17 Number 60 Lifetime months Actual 3lanned Aerospace Corporation Air Force Satellite assumed average number choose a random correct satellite malfunctions current replenishment models derived effect of work-arounds effective reliability function EFFECTIVE SATELLITE RELIABILITY estimate existing satellite replenishment function Random number Incorporating the effect incorporating work-arounds inverse function lifetime number mean lifetime mean satellite MEDIAN LIFETIMES Nsta number of orbital Number of satellites number of work-arounds payloads piece-part reliability function Piece-part reliability R(t Poisson distribution Poisson parameter predicted satellite lifetimes Rand Corporation REPRESENTATION OF SATELLITE result in satellite SAMSO satel Satellite Control Facility satellite designers satellite failure satellite launch/initial satellite procurement requirements satellite programs satellite reliability function satellite replenishment models satellite system satellites 11 13 satellites required shown in Fig shown in Table Simulated lifetime simulation models successful work-arounds system performance Weibull work-around distribution work-around effects work-arounds is included work-arounds per satellite