Structural Subsystem

The Structural Subsystem provides the framework for mounting the other satellite’s subsystems as well as the interface with the launch vehicle. It must meet the payload volume and mass constraints of the launch vehicle as well as provide access for installation and maintenance of the other subsystems. It also provides physical protection during ground handling, transportation, launch, and in-orbit operations. The structure must therefore be light, yet strong enough to survive the accelerations of launch and stiff enough to avoid transferring vibrations from the launch vehicle and any attitudinal control maneuvers. Materials such as aluminum, beryllium, magnesium, stainless steel, titanium, and carbon-fiber-reinforced plastics are commonly used. The structural subsystem also provides support to mount the platform’s radiation shield, as well as thrusters, and thermal control elements such as radiators, insulation blankets, and louvres. It must be able to provide protection against micro-meteorites. The shape of the structure must also support the location of attitude sensors, communications devices, and antennas without disturbing their fields of view.