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System Identification for Limit Cycling Systems: A Case Study for Combustion Instabilities

Murray, Richard M. and Jacobsen, C.A. and Casas, R. and Khibnik, A.I. and Johnson, C.R. Jr. and Bitmead, R. and Peracchio, A.A. (1997) System Identification for Limit Cycling Systems: A Case Study for Combustion Instabilities. California Institute of Technology . (Unpublished) http://resolver.caltech.edu/CaltechCDSTR:1997.CIT-CDS-97-012

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Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechCDSTR:1997.CIT-CDS-97-012

Abstract

This paper presents a case study in system identification for limit cycling systems. The focus of the paper is on (a) the use of model structure derived from physcal considerations and (b) the use of algorithms for the identification of component subsystems of this model structure. The physical process used in this case study is that of a reduced order model for combustion instabilities for lean premixed systems. The identification techniques applied in this paper are the use of linear system identification tools (prediction error methods), time delay estimation (based on Kalman filter harmonic estimation methods) and qualitative validation of model properties using harmonic balance and describing function methods. The novelty of the paper, apart from its practical application, is that closed loop limit cycle data is used together with a priori process structural knowledge to identify both linear dynamic forward and nonlinear feedback paths. Future work will address the refinement of the process presented in this paper, the use of alternative algorithms and also the use of control approachs for the validated model structure obtained from this paper.


Item Type:Report or Paper (Technical Report)
Group:Control and Dynamical Systems Technical Reports
Record Number:CaltechCDSTR:1997.CIT-CDS-97-012
Persistent URL:http://resolver.caltech.edu/CaltechCDSTR:1997.CIT-CDS-97-012
Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:28007
Collection:CaltechCDSTR
Deposited By: Imported from CaltechCDSTR
Deposited On:15 Oct 2002
Last Modified:26 Dec 2012 14:28

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