naa a22 4500 510774318 CHVBK 20180411083225.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s40295-015-0069-6 doi (NATIONALLICENCE)springer-10.1007/s40295-015-0069-6 State-space Modeling of Large Domain Wave Propagation Systems by Partitioned C-matrices [Elektronische Daten] [Richard Darling, Minh Phan, Stephen Ketcham] Reduced-order models represent an enabling technology in the representation of large-scale dynamic systems. This technology often involves identification of linear state-space models with system matrix A, input matrix B, and output matrix C. Our focus is partitioned C-matrices that facilitate creation of reduced-order discrete-time state-space models appropriate for simulation of large-output wave propagation systems. The C y-partition method, used to generate the partitioned C-matrices, is suitable when the output dimension is orders of magnitude higher than the number of discrete time samples specifying the time duration of interest. The resulting state-space model is characterized by a relatively small C-matrix component relating a small number of "anchored” or basis outputs to the inputs, and a large C-matrix component relating all remaining outputs to the anchored outputs. The partitioned C-matrix and the associated A, B matrices can be identified from input-output data directly using time-domain signals, without the necessity of identifying or computing transfer functions. The resulting models can be used for accurate and rapid prediction of wave-field responses. The theory is general for modeling short-duration dynamics and the applications include modeling of vibrations propagating through a large flexible structure (for damage assessment for example). American Astronautical Society, 2015 State-space nationallicence Modeling nationallicence Large-domain nationallicence Wave-propagation nationallicence C-matrix nationallicence Reduced-order nationallicence Darling Richard Signature Physics Branch, Cold Regions Research and Engineering Laboratory, U.S. Army Engineer Research and Development Center, 72 Lyme Rd., 03755, Hanover, NH, USA aut Phan Minh Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, 03755, Hanover, NH, USA aut Ketcham Stephen Signature Physics Branch, Cold Regions Research and Engineering Laboratory, U.S. Army Engineer Research and Development Center, 72 Lyme Rd., 03755, Hanover, NH, USA aut The Journal of the Astronautical Sciences Springer US; http://www.springer-ny.com 60/3-4(2013-12-01), 541-558 0021-9142 60:3-4<541 2013 60 40295 https://doi.org/10.1007/s40295-015-0069-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s40295-015-0069-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Darling Richard Signature Physics Branch, Cold Regions Research and Engineering Laboratory, U.S. Army Engineer Research and Development Center, 72 Lyme Rd., 03755, Hanover, NH, USA aut NATIONALLICENCE 700 1- Phan Minh Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, 03755, Hanover, NH, USA aut NATIONALLICENCE 700 1- Ketcham Stephen Signature Physics Branch, Cold Regions Research and Engineering Laboratory, U.S. Army Engineer Research and Development Center, 72 Lyme Rd., 03755, Hanover, NH, USA aut NATIONALLICENCE 773 0- The Journal of the Astronautical Sciences Springer US; http://www.springer-ny.com 60/3-4(2013-12-01), 541-558 0021-9142 60:3-4<541 2013 60 40295 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer