Servo motors can control speed, positional accuracy is very accurate, and can convert voltage signals into
torque and speed to drive the control object. Servo motor rotor speed is controlled by the input signal and can
react quickly, in the automatic control system, used as an executive element, and has a small electromechanical
time constant, high linearity, etc., can be converted to the received electrical signal into an angular displacement
or angular velocity output on the motor shaft.