Servo

A servo, short for servomechanism, is a closed-loop feedback control system that uses position feedback to control motion or output. It generally comprises a motor, a control circuit, and a position sensor. Servos are employed in various applications to precisely control the position, speed, and acceleration of a mechanical element. The control system constantly monitors the actual position and compares it to a desired setpoint, making adjustments to the motor's input to minimize any error. Servos are typically compact and readily available and are designed to hold a position until told to move or change speed.

Servo meaning with examples

• In radio-controlled (RC) cars, servos control the steering and throttle, precisely positioning the wheels and regulating engine speed.
• Robotics rely heavily on servos for joint movement, allowing for precise positioning and manipulation of robotic arms and legs. These are often multi-axis systems.
• Aircraft control surfaces, such as ailerons and elevators, are often moved by servos, ensuring accurate flight control by using electric input signals.
• Model trains use servos to control track switches and signals, mimicking a real railway operation. These also help prevent damage in case of misalignment