NASA Office of Logic Design

NASA Office of Logic Design

A scientific study of the problems of digital engineering for space flight systems,
with a view to their practical solution.

2.1 Spaceborne Computer Functions

The functions or tasks of spaceborne computers have ranged from simple mission sequencing to complex multipurpose uses in manned spacecraft. With the expanding complexity of space missions, the number of tasks which are assigned to onboard digital computers is growing rapidly. In many cases, digital computers are taking over functions which were formerly performed by analog equipment. As time goes by, increasing experience is gained in sharing a computer or system of computers among numerous tasks. In spaceborne applications, most of the tasks involve real-time, sampled-data control problems, which place specific demands on, and yield certain advantages for, the computer system. Sections 2.1.1 through 2.1.6 summarize some of the most common onboard computer tasks.

2.1.1 Guidance and Navigation
2.1.2 Stabilization and Control
2.1.3 Man Machine Interface
2.1.4 Data Processing
2.1.5 Systems Checkout
2.1.6 Computer Self-Test

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Last Revised: February 03, 2010
Digital Engineering Institute
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