What type of mechanical functionality does a resolver primarily provide?

A resolver primarily provides angle measurement functionality. It is an electromechanical device used for determining angular positions. This capability is essential in many applications, especially in aerospace and robotics, where precise angular motion is crucial for operation. Resolvers convert the angular position of a shaft into an electrical signal, representing the angle in terms of sine and cosine signals. This allows for accurate tracking of the position as the shaft rotates.

Moreover, the angle measurement provided by a resolver is robust and reliable, making it suitable for environments that may involve high levels of interference or physical strain. Understanding the nature of the resolver's operation helps clarify its significance in control systems, where precise spatial orientation is needed.

While frequency modulation, voltage regulation, and speed control are important functionalities in various electronic and mechanical systems, they are not the primary function of a resolver, which focuses specifically on measuring angles. Thus, the clarity of how a resolver operates and its primary role in angle measurement reinforces the correctness of the answer.