Definition

Noun: - A device that converts energy (typically electrical, hydraulic, or pneumatic) into precise rotational motion or torque. In computing, it specifically refers to the component that positions a read/write head over the correct track on a disk storage device.

Usage

This is a technical term used primarily in engineering, robotics, and computer hardware contexts. It describes a mechanism responsible for controlled rotation. - The robotic arm's joint is driven by a powerful rotary actuator. - In the provided computing context: The hard drive failed because the rotary actuator that positions the read/write head became stuck.

Advanced Usage

• In Control Systems: A rotary actuator is a key component in servo mechanisms and automated systems where precise angular positioning is required.
• Types: Common types include electric motors (servo, stepper), hydraulic motors, and pneumatic rotary actuators. The specific type defines its torque, speed, and application.

Variants and Related Words

• Actuator (n): The broader category of devices that create motion. A rotary actuator is a specific type of actuator.
• Positioner (n): A general term for a device that moves an object to a specific location, which can include linear or rotary motion.
• Servomotor (n): A common type of rotary actuator that allows for precise control of angular position, velocity, and acceleration.

Synonyms

• Rotary drive
• Rotational actuator
• (In specific contexts) Servo, stepper motor

Related Phrases

• Rotary motion: The type of movement (circular) produced by the actuator.
• Actuator arm: In a hard disk drive, the mechanical arm that holds the read/write head, which is moved by the rotary actuator.

Noun

1. (computer science) the actuator that moves a read/write head to the proper data track