Closed-loop identification for a continuous-time model of a multivariable dual-rate system with input fast sampling⁎⁎This work was supported by JSPS KAKENHI Grant Numbers JP15K00038, JP16H04385

In this paper, we consider closed-loop identification for an unstable multivariable dual-rate system with the sampling period of the output being an integral multiple of the hold period of the input. Using the well-known lifting technique, the relation of a stack of the succeeding input samples to t...

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Bibliographic Details
Published in:IFAC-PapersOnLine 2018, Vol.51 (2), p.415-420
Main Authors: Nakayama, Mitsuhiro, Oku, Hiroshi, Ushida, Shun
Format: Article
Language:English
Subjects:
closed-loop system
lifted model
multirate system
subspace method
System identification
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Summary:In this paper, we consider closed-loop identification for an unstable multivariable dual-rate system with the sampling period of the output being an integral multiple of the hold period of the input. Using the well-known lifting technique, the relation of a stack of the succeeding input samples to the output, i.e., the lifted model, is estimated using CL-MOESP, which is a closed-loop subspace model identification method. Then, we will consider the conversion of the identified lifted model to a single-rate discrete-time model with the shorter sampling period and furthermore a continuous-time model in order to be used for continuous-time controller design. Finally, a numerical example illustrates the effectiveness of the proposed method.
ISSN:2405-8963
2405-8963
DOI:10.1016/j.ifacol.2018.03.071