It’s called a slip ring. They use a data bus and power so there aren’t a million rings trying to transfer information from each sensor or component individually. It’s the same way you have buttons and a horn on your steering wheel, which also rotates. Here’s an example.
[https://www.moog.com/products/slip-rings/aerospace-military-slip-rings/vehicular-slip-rings.html](https://www.moog.com/products/slip-rings/aerospace-military-slip-rings/vehicular-slip-rings.html)
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