Abstract
For accurate positioning of motion systems having an accurate yet low-order dynamic model from actuators to sensors and to unmeasured performance variables is crucial. A (reduced) Finite Element (FE) dynamic model may be a
good candidate. However, a FE model in practice has limited accuracy in describing the dynamic behavior of the system for nano positioning performance. This can be either due to the simplifications in the FE modeling or due to system variations. To improve the dynamic properties of the (reduced) FE model toward dynamic properties of the real system, an Iterative Pole-Zero (IPZ) model updating procedure that updates poles and zeros of a single Frequency Response Function (FRF) was recently proposed. Using more FRFs from different actuator/sensor configurations helps to better improve the dynamic properties of the (reduced) FE model. In this paper, an extension of IPZ model updating to use multiple FRF measurements is presented. The proposed method is verified using a simulated experiment of a pinned-sliding beam structure.
good candidate. However, a FE model in practice has limited accuracy in describing the dynamic behavior of the system for nano positioning performance. This can be either due to the simplifications in the FE modeling or due to system variations. To improve the dynamic properties of the (reduced) FE model toward dynamic properties of the real system, an Iterative Pole-Zero (IPZ) model updating procedure that updates poles and zeros of a single Frequency Response Function (FRF) was recently proposed. Using more FRFs from different actuator/sensor configurations helps to better improve the dynamic properties of the (reduced) FE model. In this paper, an extension of IPZ model updating to use multiple FRF measurements is presented. The proposed method is verified using a simulated experiment of a pinned-sliding beam structure.
Original language | English |
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Title of host publication | Dynamics of Civil Structures, Volume 2 |
Subtitle of host publication | Proceedings of the 35th IMAC, A Conference and Exposition on Structural Dynamics 2017 |
Editors | J. Caicedo, S. Pakzad |
Place of Publication | Dordrecht |
Publisher | Springer |
Pages | 65-70 |
Number of pages | 6 |
ISBN (Electronic) | 978-3-319-54777-0 |
ISBN (Print) | 978-3-319-54776-3 |
DOIs | |
Publication status | Published - 2017 |
Event | 35th IMAC, A Conference and Exposition on Structural Dynamics, 2017 - Hyatt Regency Orange County, Garden Grove, United States Duration: 30 Jan 2017 → 2 Feb 2017 |
Publication series
Name | Conference Proceedings of the Society for Experimental Mechanics Series |
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Publisher | Society for Experimental Mechanics (SEM) |
ISSN (Print) | 2191-5644 |
ISSN (Electronic) | 2191-5652 |
Conference
Conference | 35th IMAC, A Conference and Exposition on Structural Dynamics, 2017 |
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Abbreviated title | IMAC XXXV |
Country/Territory | United States |
City | Garden Grove |
Period | 30/01/17 → 2/02/17 |
Keywords
- FE modeling
- Least square optimization
- Model updating
- Unmeasured performance variables