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Sub Systems
Control System
Like most power systems on earth, the satellite power system needs to adapt to variations in the environment and the performance of the devices on board (PV, gyrotron, etc.).
There are two types control in the SunWire system:
Automatic, feedback-based control stabilizes the system and keeps it operational by making immediate self-adjustments.
Manual control is provided by the communications link and can be used to change any of the satellite's parameters or functions.
Attitude Control
To ensure power transfer link integrity, it is important that the system remain stationary in its orbit. Due to orbital deterioration and solar sail pull (our mirrors), thrusters must be included for station-keeping exercises. Developing thrusters for the SunWire satellite is an especially challenging task due to its size.
Mechanical Supports
The system needs to be put together using strong yet very light material. Composite structures are desired because carbon fiber is a low-density, high-strength material.
Heat Dissipation
The PV arrays' relatively efficiency will generate excess energy to be dissipated as heat. This heat will raise the temperature of the PV and reduce efficiency, initiating a potentially system-degrading cycle. Heatsinks and coolers will be used to alleviate overheating issues from the PV. Other components in the system will be protected by passive thermal systems. The gyrotrons will be kept in the shade, and the electronics will be somewhat isolated inside the main satellite housing.
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