C. HEAD GESTURE CONTROL
In [20] a microcontroller system that enables standard
electric wheelchair control by head motion is developed. A
prototype of the system is implemented and experimentally
tested. The prototype consists of a digital part (an
accelerometer and a microcontroller) and a mechanical
actuator. The accelerometer is used to gather head motion
data. To process the sensor data, an algorithm is
implemented using a microcontroller. The output of the
digital system is connected with the mechanical actuator,
which is used to position the wheelchair joystick in
accordance with the user's command. Sensor data is
processed by an algorithm, implemented within the
microcontroller. Thus, user head motion is translated into
electric wheelchair joystick position. The mechanical
actuator is compatible with several different types of
standard electric wheelchair.