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Practical experience with unified discrete and continuous–time, multi–input identification for control system design

Taylor, C. James and Young, Peter and Cross, Philip (2012) Practical experience with unified discrete and continuous–time, multi–input identification for control system design. In: 16th IFAC Symposium on System Identification. IFAC, Brussels.

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Abstract

The paper is concerned with the practical aspects of a unified approach to the identification and estimation of multiple-input, single-output (MISO) transfer function models for both continuous and discrete-time systems. The estimation algorithms considered in the paper are based on the Refined Instrumental Variable (RIV) approach to identification and estimation, where the MISO model denominator polynomials are normally constrained to be equal. Unconstrained RIV estimation presents a more difficult problem and it is necessary to exploit an iterative, back-fitting routine to handle this more general situation. The paper focuses on the practical realization of this back-fitting algorithm, including its initiation from either common denominator MISO or repeated SISO estimation. The rivcdd algorithm for continuous-time model estimation, as implemented in the CAPTAIN Toolbox for Matlab is then used in three practical examples: first, the modelling of solute transport and dispersion in a water body; secondly, modelling for two control problems, namely a pair of connected laboratory DC motors and a nonlinear wind turbine simulation.

Item Type: Contribution in Book/Report/Proceedings
Uncontrolled Keywords: identification ; discrete-time ; continuous-time ; instrumental variables ; MISO
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 58614
Deposited By: ep_importer_pure
Deposited On: 26 Sep 2012 09:11
Refereed?: No
Published?: Published
Last Modified: 01 Apr 2014 14:40
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/58614

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