ABSTRACT
System identification can also be conducted with information directly from the time response. The time-domain approach has an advantage over the frequency-domain method in that there is an unlimited supply of measured information. Moreover, the damping properties of structures cannot be readily estimated in the frequency-domain method. Another advantage is that there is no requirement for complete measurements in space and state. However, the detrimental effect from measurement noise (Hjelmstad and Banan, 1995) remains significant with time-domain methods (Ge and Soong, 1998). This chapter addresses the system identification approach based on the sensitivity of the measured response with respect to a system parameter. Features of the approach with different applications are presented.
