A method and apparatus for controlling a haptic device. In one embodiment,
the haptic device includes an actuator; an actuator sensor, producing an
actuator signal indicative of the actuator velocity; a load; a load
output sensor producing a load output signal indicative of the load
position; and a controller in electrical communication with the load
output sensor, actuator sensor and actuator. The controller controls the
actuator in response to the actuator signal and the load output signal to
provide a haptic response to a user. In one embodiment, the method for
controlling an actuator of a haptic device includes the steps of
producing an actuator signal indicative of the velocity of an actuator;
producing a position signal indicative of the position of a load; and
controlling the actuator in response to the actuator signal and the load
output position signal to produce a haptic response to a user.