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Paper Information

Journal:   INTERNATIONAL JOURNAL OF ENGINEERING   APRIL 2004 , Volume 17 , Number 1 (TRANSACTIONS B: APPLICATIONS); Page(s) 19 To 39.
 
Paper: 

HEURISTIC PROCESS MODEL SIMPLIFICATION IN FREQUENCY RESPONSE DOMAIN

 
 
Author(s):  SHIRVANI M., DOUSTARI M.A., SHAHBAZ M., EKSIRI Z.
 
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Abstract: 
Frequency response diagrams of a system include detailed and recognizable ‎information about the structural and parameter effects of the transfer function model ‎of the system. The information are qualitatively and quantitatively obtainable from ‎simultaneous consideration of amplitude ratio and phase information. In this paper, ‎some rules and relationships are presented for making use of frequency response ‎information in order to identify the structure of rational and irrational models in a ‎heuristic manner. Estimation of the values of the parameters are also accomplished in ‎a graphical trial and error procedure. As an example, the heuristic method was applied ‎for identifying the simplified model of a rotary cement kiln from the frequency ‎response information of the analytically derived model of the system. The analytical ‎model of the kiln, used in this paper, was obtained elsewere in a detailed procedure ‎with some assumptions and by using initial and boundary conditions. Results obtained ‎from identification of the simplified model for rotary cement kiln not only reveal the ‎application of the heuristic method for model identification, but also demonstrate the ‎appearance of unstable poles and zeros in the model of the system‏.‏
 
Keyword(s): HEURISTIC IDENTIFICATON, MODEL STRUCTURE, IRRATIONAL TRANSFER FUNCTION, DISTRIBUTED PARAMETER, ROTARY CEMENT KILN, LIMITED-DELAY-RESONANCE, UNLIMITED-DELAY-RESONANCE
 
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