Appeal No. 1999-1543
Application No. 08/456,762
The disclosed invention is directed to motion controlling
apparatus including a combining network, having an acceleration
input for receiving an acceleration signal representative
of acceleration of a movable element, from an accelerometer, and
a position input for receiving a position signal representative
of the position of the movable element, and an output for
providing an inferred position signal representative of an
inferred position of the movable element. The combining network
includes a signal processor for processing the acceleration
signal to provide a modified acceleration signal, a second signal
processor for processing the position signal to provide a
modified position signal, and a combiner for additively combining
the modified acceleration signal with the modified position
signal to provide the inferred position signal. The first signal
processor may comprise a low pass filter, but may include a
velocity terminal for providing a velocity signal representative
of the velocity of the movable element. There may be a second
low pass filter for filtering the position signal to provide the
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