A comparison of software-based approaches to identifying FOPDT and SOPDT model parameters from process step response data

Cox, Chris, Tindle, John and Burn, Kevin (2016) A comparison of software-based approaches to identifying FOPDT and SOPDT model parameters from process step response data. Applied Mathematical Modelling, 1 (1). pp. 100-114. ISSN 0307-904X

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Abstract

System identification is the experimental approach to deriving process models, which can take many forms depending upon their intended use. In the work described in this paper, the ultimate aim is to use them in the design of controllers for regulating engineering processes. Modelling always involves approximations since all real systems are to some extent non-linear, time-varying, and distributed. Thus, it is highly improbable that any set of models will contain the ‘true’ system structure. A more realistic aim is therefore to identify a model that provides an acceptable approximation, in the context of the application in which it is used. In controller design, a first step is often to determine the model using step and frequency response data. This paper compares different modern software approaches that exploit step response data, where the aim is to determine either a first- or second-order-plus-dead-time (FOPDT or SOPDT) transfer function. They include an integral equation method, an algorithm available in the MATLAB Optimization Toolbox, and recently developed in-house software that uses a particle swarm optimisation (PSO) approach.

Item Type: Article
Subjects: Computing
Engineering
Divisions: Faculty of Health Sciences and Wellbeing
Faculty of Health Sciences and Wellbeing > School of Nursing and Health Sciences
Faculty of Technology
Faculty of Technology > School of Engineering
Depositing User: Paula Normington
Date Deposited: 21 Jul 2015 08:28
Last Modified: 24 Feb 2021 13:41
URI: http://sure.sunderland.ac.uk/id/eprint/5581
ORCID for Kevin Burn: ORCID iD orcid.org/0000-0002-3571-8448

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