Identification of the dynamics of a two-dimensional grid structure using least square lattice filtersThe basic theory of least square lattice filters and their use in identification of structural dynamics systems is summarized. Thereafter, this theory is applied to a two-dimensional grid structure made of overlapping bars. Previously, this theory has been applied to an integral beam. System identification results are presented for both simulated and experimental tests and they are compared with those predicted using finite element modelling. The lattice filtering approach works well for simulated data based on finite element modelling. However, considerable discrepancy exists between estimates obtained from experimental data and the finite element analysis. It is believed that this discrepancy is the result of inadequacies in the finite element modelling to represent the damped motion of the laboratory apparatus.
Document ID
19840050346
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Montgomery, R. C. (NASA Langley Research Center Hampton, VA, United States)
Sundararajan, N. (NASA Langley Research Center Hampton, VA, United States)