What major function do synchros perform in electronic systems?

Synchros play a crucial role in electronic systems primarily as devices for position sensing. They are used to convert the angular position or displacement of a rotating shaft into an electrical signal, which can then be transmitted to other components in a system for further processing. This capability makes synchros essential in applications like aircraft instrumentation, where knowing the precise position of the control surfaces is critical for navigation and safety.

The principle behind synchros is based on electromagnetic induction, where the position of the rotor affects the output voltage of the synchro, allowing for accurate measurements of angular positioning. The output can be used to indicate the position or to control other devices, making synchros integral to feedback systems in various electronic applications.

In contrast, while power supply, communication, and energy storage are vital functions in electronic systems, they do not align with the primary role of synchros. Power supply refers to providing electrical energy, communication involves transmitting information, and energy storage is related to retaining electrical energy in devices like batteries or capacitors. Thus, the primary and defining function of synchros as position sensing devices sets them apart in electronic systems.