Mimo control of conveyor-belt drying chambers

Kiranoudis, CT; Bafas, GV; Maroulis, ZB; Marinos-Kouris, D

dc.contributor.author	Kiranoudis, CT	en
dc.contributor.author	Bafas, GV	en
dc.contributor.author	Maroulis, ZB	en
dc.contributor.author	Marinos-Kouris, D	en
dc.date.accessioned	2014-03-01T01:11:16Z
dc.date.available	2014-03-01T01:11:16Z
dc.date.issued	1995	en
dc.identifier.issn	0737-3937	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11580
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	DISTILLATION-COLUMNS	en
dc.title	Mimo control of conveyor-belt drying chambers	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/07373939508916943	en
heal.identifier.secondary	http://dx.doi.org/10.1080/07373939508916943	en
heal.language	English	en
heal.publicationDate	1995	en
heal.abstract	The development of MIMO control systems for individual conveyor-belt drying chambers was studied for the case of industrial units used for the moisture removal from wet raisins. The process was considered to be a 2×2 open-loop system in which material moisture content and temperature at the exit of the drying chamber were to be controlled. Its dynamic behavior was investigated via digital simulation of the corresponding process mathematical model which involves 6 state variables. The effect of several manipulated and load variables on process outputs was explored by examining the corresponding responces obtained when the input variables were step forced into the non-linear dryer model simulator around the operational point studied. Reliable transfer functions for each interaction module were produced, based on simulated data and process basic constants. The best control configuration was selected by deriving the RGA values of each one that was based on its frequency information. The proposed scheme, used steam and fresh air flowrates as manipulated variables. This scheme was found to imply insignificant interactions between material moisture content and temperature loops. The suggested pairing was material moisture content controlled by steam flowrate and fresh air flowrate controlling material temperature. Single-loop Pi-feedback controllers were installed in each loop and tuned by Ziegler-Nichols techniques. The closed-loop system performance was examined by suitably introducing step changes to both set-points as well as to process disturbances. The overall control system performance proved to be quite satisfactory. Copyright © 1995 by Marcel Dekker, Inc.	en
heal.publisher	MARCEL DEKKER INC	en
heal.journalName	Drying Technology	en
dc.identifier.doi	10.1080/07373939508916943	en
dc.identifier.isi	ISI:A1995QE48600005	en
dc.identifier.volume	13	en
dc.identifier.issue	1-2	en
dc.identifier.spage	73	en
dc.identifier.epage	97	en