... for publication in the JOURNAL OF VIBRATION AND ACOUSTICS . Manuscript received December 2000; Revised April 2002. Associate Editor: C. Farrar. 01 December 2000 01 April 2002 20 09 2002 damping vibrations classical mechanics poles and zeros A major reason for studying...

...Timothy J. Johnson, Research Assistant; Douglas E. Adams, Assistant Professor This article discusses the use of frequency domain transmissibility functions for detecting, locating, and quantifying damage in linear and nonlinear structures. Structural damage affects both the system poles and zeros...

... and structural damping do not appreciably change the damping achieved using the optimal parameters. The pole placement analysis demonstrates that only the pole-zero spacing and DC gain of the collocated transfer function are required to choose the optimal parameters. An on-line identification procedure...

... control approach using dynamic H 2 controllers implemented with spatially weighted arrays of collocated pressure sensors and constant volume-velocity actuators. The open-loop system is shaped using spatially weighted transducer arrays to yield increased pole-zero separation, which results in better closed...