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2017 | OriginalPaper | Chapter

8. Identification in Closed-Loop Operation

Authors : Ioan Doré Landau, Tudor-Bogdan Airimitoaie, Abraham Castellanos-Silva, Aurelian Constantinescu

Published in: Adaptive and Robust Active Vibration Control

Publisher: Springer International Publishing

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Abstract

Identification in closed-loop operation offers the possibility to identify system models for controller redesign leading to improved performance. It also allows retuning of existing controllers without opening the loop. Specific aspects related to active vibration control systems will be enhanced. Closed-Loop Output Error (CLOE) method which has already been used in the context of AVC will be presented. Validation techniques for identification in closed-loop will be reviewed. A real-time example will illustrate the methodology.

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Footnotes
1
In this case, \(S_{y\upsilon }\) corresponds to the transfer function between \(r_u(t)\) and y(t).
 
2
This is equivalent to sending the excitation to the input of the filter R in Fig. 8.2b.
 
3
The external excitation effect is equivalently obtained by filtering the signal through R and adding it to the output of the filter R in the upper part of the Fig. 8.3. Using algorithms from the CLID toolbox, both T and R should be modified according to the Fig. 8.3.
 
4
Both true plant model and estimated plant model have the same orders.
 
5
Recall that the maximum of the output sensitivity function corresponds to the minimum distance with respect to the Nyquist point.
 
6
It was not possible to conduct a sufficiently large number of measurements for this example.
 
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Metadata
Title
Identification in Closed-Loop Operation
Authors
Ioan Doré Landau
Tudor-Bogdan Airimitoaie
Abraham Castellanos-Silva
Aurelian Constantinescu
Copyright Year
2017
DOI
https://doi.org/10.1007/978-3-319-41450-8_8