Patent ID: 8527193
Filing Date: 2013-09-03
Classification: F42B

Abstract:
1. A method for determining motion between first and second equipment systems positioned on a structure that is subject to deformation due to vibrations, comprising: receiving first and second acceleration signals from first and second accelerometers associated with the first and second equipment systems, respectively, and conditioning using a computer processor said first and second acceleration signals; receiving first and second ship attitude signals from first and second inertial navigation systems (INS) sensors positioned at different locations on-board the ship; generating first and second signals representative of rotational and translational displacements of said first and second equipment systems based on said conditioned first and second acceleration signals, and said first and second attitude signals; determining the translational and rotational displacements of the first and second equipment systems due to modal vibration of the structure at times T determining the translational and rotational displacements of the first and second equipment systems due to forced vibration at times T determining relative motion between the first and second equipment systems by differencing the translational and rotational displacements at each of the first and second equipment systems at times T