ABSTRACT
I f the actual motor speed is more than the set-point, e p is negative and this value is
subtracted from the signal fed to the motors and so the motor slows down. By
varying the value o f k p we increase the amount o f proportional control and hence
the speed o f response o f the controller. Care must be exercised however, not to
increase k p by too much, otherwise the system becomes unstable. A n effect o f
instability is that the controller overcompensates for changes in motor speed and
the motor tends to hunt (increase and decrease speed in an oscillatory fashion).
