NASA NTRS · 19660031829
Data automation system /DAS/ on Mariner IV MARS probe involving real and nonreal time for experiments during cruise and encounter flights
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Nay, D. L., Schneider, W. J.. 1965-01-01. Data automation system.. https://ntrs.nasa.gov/citations/19660031829
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This thesis provides design and analysis of techniques for global load balancing on ensemble architectures running soft-real-time object-oriented applications with statistically periodic loads. It focuses on estimating the instantaneous average load over all the processing elements. The major contribution is the use of explicit stochastic process models for both the loading and the averaging itself. These models are exploited via statistical time-series analysis and Bayesian inference to provide improved average load estimates, and thus to facilitate global load balancing. This thesis explains the distributed algorithms used and provides some optimality results. It also describes the algorithms' implementation and gives performance results from simulation. These results show that our techniques allow more accurate estimation of the global system load ing, resulting in fewer object migration than local methods. Our method is shown to provide superior performance, relative not only to static load-balancing schemes but also to many adaptive methods.
Hybrid computer program for real time trajectory determination of human controlled space vehicle booster
Onboard computers for pre-transmission data processing, automation of data acquisition centers, and real time data relay to control centers for advanced space information systems