What best describes a servo motor in control systems?

What best describes a servo motor in control systems?

• A. A device that provides precise angular position control with feedback
• B. A simple motor with fixed speed
• C. A sensor that measures angle but does not drive motion
• D. A power supply unit

Answer: (A)

In control systems, a servo motor is an actuator that uses feedback to achieve and hold a precise angular position. The system receives a commanded position, reads the actual position with a sensor such as an encoder or potentiometer, and the controller adjusts the motor drive to reduce any error between where it should be and where it actually is. This closed-loop setup lets the motor ramp to the target, correct for disturbances, and hold the position accurately, often using a control scheme like PID. It’s different from a simple motor that runs at a fixed speed without feedback, from a sensor that only measures angle without driving motion, and from a power supply that only provides electrical power without control actions.

In control systems, a servo motor is an actuator that uses feedback to achieve and hold a precise angular position. The system receives a commanded position, reads the actual position with a sensor such as an encoder or potentiometer, and the controller adjusts the motor drive to reduce any error between where it should be and where it actually is. This closed-loop setup lets the motor ramp to the target, correct for disturbances, and hold the position accurately, often using a control scheme like PID. It’s different from a simple motor that runs at a fixed speed without feedback, from a sensor that only measures angle without driving motion, and from a power supply that only provides electrical power without control actions.