Motor actuator control system and method for controlling motor actuator

A motor actuator control system comprising:

• a motor having a commutator and a pair of brushes so that an electric current is passed to the commutator through the brushes;
• an output shaft for outputting rotational motion of the motor at reduced rotational speed;
• a gear train comprising a plurality of gears for transmitting rotational motion of the motor to the output shaft while reducing rotational speed, wherein the gear train includes a first gear, which is driven directly by the motor, and a second gear, which is coupled to the first gear;
• a motor rotational position detector for detecting current surges generated when contact between the commutator and the brushes is broken, wherein each current surge indicates a degree of motor rotation;
• an output shaft rotational position detector for detecting rotational position of the second gear;
• and
• a control unit for controlling the motor on a basis of the rotational position of the second gear and a count of the current surges.