NASA NTRS · 19910034414
State-variable models of structures having rigid-body modes
Abstract
In cases where the equations of motion of a structure having rigid-body freedom are cast in state-variable form, generalized state rigid-body modes may be needed. It is possible to find a linearly-independent set of generalized vectors which transform an n x n matrix into the almost-diagonal Jordan form. Attention is presently given to equations governing these generalized eigenvectors, together with illustrative examples of the damped and undamped structure cases.
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Craig, Roy R., Jr., Su, Tsu-Jeng, Ni, Zhenhua. 1990-12-01. State-variable models of structures having rigid-body modes. https://ntrs.nasa.gov/citations/19910034414
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