Abstract
An experiment is designed to identify input-output relations of a mechanical positioning system with excitation amplitude dependent mechanical behaviour. When evaluated in the frequency domain, these relations constitute a fingerprint of the dynamical behaviour of the system. Since the commonly used FFT based techniques for Frequency Response Function (FRF) estimations require stationary signals, an alternative technique is introduced. With a digital filtering based technique fixed frequency higher order FRFs can be estimated as function of time dependent excitation levels. The paper describes the data processing techniques and shows measurement results of the higher order FRFs of a system with strong amplitude dependent mechanical behaviour caused by a friction induced resonance.
| Original language | English |
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| Title of host publication | From the electrometer to the networked instruments : a giant step towards a deeper knowledge : proceedings of the 21st IEEE instrumentation and measurement technology conference, Como, Italy, May 18-20, 2004 |
| Editors | S. Demidenko, R. Ottoboni, D. Petri, V. Piuri, D. Chong, T. Weng |
| Place of Publication | Piscataway |
| Publisher | Institute of Electrical and Electronics Engineers |
| Pages | 2177-2182 |
| ISBN (Print) | 0-7803-8248-X |
| Publication status | Published - 2004 |