Design
| Enviro |
Astro | Propulsion
| Power | Thermal
| Structures | AD&C
| CDHS |
Test
An
orderly approach is necessary
to
transform design requirements into the final system.
Design
Phases
Conceptual
Design
is
the first step in describing a space system. Every
conceivable operational scenario is rigorously analyzed
to ensure that this conceptualized spacecraft will
meet mission requirements from the start. Initial
subsystem specifications are then defined from this
concept. The output is an approximate description
of spacecraft subsystems, schedules, costs and associated
developmental risks.
Preliminary
Design
builds on the Conceptual Design process. Subsystems
are further refined and optimized. Detailed subsystem
specifications are determined to the component level.
Computer simulation, physical modeling and historical
component performance data are used to predict performance.
Subsystem models are then combined this same way
to evaluate their collective effect. Schedules and
costs are updated with substantiated subsystem and
spacecraft performance data.
Detailed
Design
starts with the Preliminary Design and perfects
the spacecraft to final specifications. Subsystems
are built for design verification and determination
of design margins through physical testing of non-flight-qualified
components. Reliability assessments, estimates of
overall spacecraft performance and performance margins
result from these tests. Schedules and costs are
revised based on this now nearly complete spacecraft.
