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Development Of An Efficient Algorithm For Model Structure Selection In System Identification

Md Fahmi, Abd Samad and Abd Samad, Hasan Basari and Hishamuddin, Jamaluddin (2012) Development Of An Efficient Algorithm For Model Structure Selection In System Identification. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

System identification is a field of study involving the derivation of a mathematical model to explain the dynamical behaviour of a system. One of the steps in system identification is model structure selection which involves the selection of variables and terms of a model. Several important criteria for a desirable model structure include its accuracy in future prediction and model parsimony. A parsimonious model structure is desirable in enabling easy control design. Two methods of model structure selection are closely looked into and these are deterministic mutation algorithm (DMA) and forward selection procedure. The DMA is known to be originated from evolutionary computation whereas forward selection procedure may be listed under the study of regression. They have close similarities in characteristics, more specifically known as forward search in model structure selection. However, both also function in a population-based optimization and statistical approaches, respectively. Due to the closeness, this research attempts to clarify the advantages and disadvantages of both methods through model structure selection of difference equation model in system identification. Simulated and real data were used. To allow for fair comparison, DMA was altered so as to equalize its strength, where applicable, to that of forward selection procedure. It was found out that DMA not only has the advantage of simpler procedure but it also superceded the performance of forward selection procedure, even with a handicapped alteration.

Item Type: Final Year Project (Project Report)
Uncontrolled Keywords: System identification, System identification - Mathematical models,
Subjects: Q Science > Q Science (General)
Q Science > QA Mathematics
Divisions: Library > Long/ Short Term Research > FKM
Depositing User: Mohd Hannif Jamaludin
Date Deposited: 09 May 2016 08:30
Last Modified: 09 May 2016 08:30
URI: http://digitalcollection.utem.edu.my/id/eprint/16519

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