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Identification Aspects of Inter-Sample Input Behavior
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
1994 (English)In: Proceedings of the 10th IFAC Symposium on System Identification, 1994, Vol. 3, 137-142 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this contribution aspects of inter-sample input signal behavior are examined. The starting point is that parametric identification always is performed on basis of discrete-time data. This is valid for identification of discrete-time models as well as continuous-time models. The usual assumptions on the input signal are; i) it is band-limited, ii) it is piecewise constant or iii) it is piecewise linear. One point made in this paper is that if a discrete-time model is used, the best possible (in the model structure) adjustment to data is made. This is independent of the assumption on the input signal. However, a transformation of the obtained discrete model to a continuous one is not possible without additional assumptions on the input signal. The other point made is that the frequency functions of the discrete models very well coincides with the frequency functions of the discretized continuous time models and the continuous time transfer function fitted in the frequency domain.

Place, publisher, year, edition, pages
1994. Vol. 3, 137-142 p.
Keyword [en]
System identification, Discrete time systems, Frequency domain, Inter-sample assumptions
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-94121ISBN: 978-0080422251 (print)OAI: oai:DiVA.org:liu-94121DiVA: diva2:629323
Conference
10th IFAC Symposium on System Identification, Copenhagen, Denmark, July, 1994
Available from: 2013-06-17 Created: 2013-06-16 Last updated: 2013-06-17

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Ljung, Lennart

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