Civil Engineering Reference
In-Depth Information
Chapter 3
Satellite Structural Design
Abstract The process to develop the structural design of a ''Small Sat'' is
discussed and applied on a practical design case. It shows how to derive Small
Sat's structural requirements from the satellite configuration. Then, it addresses
the iterative design procedure used to create the current design. It also discusses
the worst load cases to which the satellite is exposed during ground, launch, and
space environments. A simplified finite element analysis of the satellite structure is
then performed to size the preliminary design of the structure. Finally, the struc-
tural module descriptions are presented. In this chapter, the process used to
develop the structural design of ''Small Sat'' is described. It shows how to derive
Small Sat's structural requirements from the satellite configuration. Then, it
addresses the iterative design procedure used to create the current design. It also
discusses the worst load cases to which the satellite is exposed during ground,
launch, and space environments. A simplified finite element analysis of the
satellite is then performed to size the preliminary design of the structure. Finally,
the structural module descriptions are presented.
3.1 Definition and Function
The structure supports the payload and satellite subsystems with enough strength
and stiffness to preclude any failure (rupture, collapse, buckling, or detrimental
deformation) that may keep them from working successfully. To perform the
mission requirements, the structure must perform the following functions:
• Structures support the satellite's key components in desirable locations, con-
sidering thermal control, fields of view for antennas and sensors, and lengths and
weights of cables. The stowed configuration must fit within the launch vehicle's
payload envelope, yet the design must provide access for installing and main-
taining components.
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