Robust time-domain identification of mass stiffness, and damping matricesAccurate estimates of the mass, stiffness, and damping characteristics of a structure is necessary for determining the control laws best suited for active control methodologies. There are several modal identification techniques available for determining the frequencies, damping ratios, and mode shapes of a structure. However, modal identification methods in both the frequency and time domains have difficulties for certain circumstances. Frequency domain techniques which utilize the steady-state response from various harmonic inputs often encounter difficulties when the frequencies are closely distributed, the structure exhibits a high degree of damping, or the steady-state condition is hard to establish. Time domain techniques have produced successful results, but lack robustness with respect to measurement noise. In this paper, two identification techniques and an estimation method are combined to form a time-domain technique to accurately identify the mass, stiffness, and damping matrices from noisy measurements.
Document ID
19910050955
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Roemer, Michael J. (State Univ. of New York Buffalo, NY, United States)
Mook, D. Joseph (New York, State University Buffalo, United States)