Identification Aspects of Inter-Sampling Behavior [Elektronisk resurs] / Torbjörn Andersson, Predang Pucar, Lennart Ljung
Andersson, Torbjörn (författare)
Pucar, Predrag, 1965- (författare)
Ljung, Lennart, 1946- (författare)
- Linköping : Univ., 1994
- Engelska  s.
Serie: LiTH-ISY-R, 1400-3902 ; 1606
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- In this contribution aspects of inter-sample input signal behavior are examined. The starting point is that parametric identication always is performed on basis of discrete-time data. This is valid for identication 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.
Indexterm och SAB-rubrik
- System identification Discrete time systems Frequency domain Inter-sample assumptions
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