Identification of Continuous-time Models from Sampled Data

By: Hugues Garnier, Liuping Wang

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eText | 13 March 2008 | Edition Number 1

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System identification is an established field in the area of system analysis and control. It aims to determine particular models for dynamical systems based on observed inputs and outputs. Although dynamical systems in the physical world are naturally described in the continuous-time domain, most system identification schemes have been based on discrete-time models without concern for the merits of natural continuous-time model descriptions. The continuous-time nature of physical laws, the persistent popularity of predominantly continuous-time proportional-integral-derivative control and the more direct nature of continuous-time fault diagnosis methods make continuous-time modeling of ongoing importance.

Identification of Continuous-time Models from Sampled Data brings together contributions from well-known experts who present an up-to-date view of this active area of research and describe recent methods and software tools developed in this field. They offer a fresh look at and new results in areas such as:

a [ time and frequency domain optimal statistical approaches to identification;

a [ parametric identification for linear, nonlinear and stochastic systems;

a [ identification using instrumental variable, subspace and data compression methods;

a [ closed-loop and robust identification; and

a [ continuous-time modeling from non-uniformly sampled data and for systems with delay.

The CONtinuous-Time System IDentification (CONTSID) toolbox described in the book gives an overview of developments and practical examples in which MATLABA(R) can be brought to bear in the cause of direct time-domain identification of continuous-time systems.This survey of methods andresults in continuous-time system identification will be a valuable reference for a broad audience drawn from researchers and graduate students in signal processing as well as in systems and control. It also covers comprehensive material suitable for specialised graduate courses in these areas.