Patent ID: 6549858
Filing Date: 2003-04-15
Classification: G10K

Abstract:
An apparatus for generating a plurality of synthesized response signals corresponding to decoupled single degree-of-freedom (SDOF) modal responses being simultaneously excited in a linear dynamic system comprising;at least one sensor, each sensor of said at least one sensor mounted at a location on said linear dynamic system for generating at least one response signal representing an actual response of said linear dynamic system at said location; a data acquisition system for periodically sampling said at least one response signal at different instances in time, storing a sequence of digitized samples for said at least one response signal and associating each of said digitized samples with one of said different instances in time; means for reading said sequence of digitized samples; means for generating a first reference model having dynamic characteristics substantially similar to a first single mode of said linear dynamic system; means for exciting said first reference model using an input excitation similar to an input excitation applied to said linear dynamic system, and for producing a first reference modal coordinate response at each of said different instances in time; means for calculating from said sequence of digitized samples a first set of spatio-temporal filter coefficients, said first set of spatio-temporal filter coefficients being based upon a plurality of said digitized samples associated with said different instances in time; and a synthesizer for applying said first set of spatio-temporal filter coefficients to said at least one response signal, and for generating a synthesized response signal corresponding to a decoupled SDOF modal response of the linear dynamic system.