Method and Apparatus for Determining Displacement from Acceleration Data

A method (100) and apparatus (900) for determining displacement from acceleration data is disclosed. The method (100) comprises partitioning (106), for an axis of acceleration, filtered acceleration data into a sequence of segments with at least one positive acceleration time segment and at least one negative acceleration time segment. The method (100) further comprises force fitting (118), by a processor (910), each positive acceleration time segment and an adjacent negative acceleration time segment into a model positive and negative acceleration pair curve such that a cumulative velocity value of the model positive and negative acceleration pair curves is equal to zero. Finally, the method (100) double integrates (120) the model positive and negative acceleration pair curves to obtain the displacement corresponding to the acceleration data.