Fuzzy logic for accurate control of heating temperature and duration in canned food sterilisation

Abstract

Autoclave thermal process is an important sterilisation procedure in the food canning industry. The performance of sterilisation is determined by the heating temperature and duration and the pressure in the autoclave, as well as by product's properties. In this study, a fuzzy logic controller is developed to maintain a small steady-state temperature error (121 ± 0.5 °C) for an sterilising duration (F0) by adapting to process deviations in the autoclave. The precise temperature control associated with on-line F0 updation assures food stuff that can be heated at the specified temperature for an expected duration and could lead therefore to successful sterilisation. The controls are implemented on a PLC (programmable logic controller) for affordability, reliability, and robustness and the operations are supervised using a web-based SCADA (supervisory control and data acquisition) system for remotely supervisory monitoring and control.

Full text

doi:10.1016/j.eaef.2015.11.003
EngineeringinAgriculture,Environmentand
Food
Availableonline15December2015
InPress,CorrectedProof—Notetousers
Researchpaper
Fuzzylogicforaccuratecontrolofheatingtemperatureand
durationincannedfoodsterilisation
ChaoChinChunga,HoHsienChena, , ,ChingHuaTingb, ,
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Abstract
Autoclavethermalprocessisanimportantsterilisationprocedureinthefoodcanning
industry.Theperformanceofsterilisationisdeterminedbytheheatingtemperatureand
durationandthepressureintheautoclave,aswellasbyproduct'sproperties.Inthis
study,afuzzylogiccontrollerisdevelopedtomaintainasmallsteadystatetemperature
error(121±0.5°C)foransterilisingduration(F0)byadaptingtoprocessdeviationsinthe
autoclave.TheprecisetemperaturecontrolassociatedwithonlineF0updationassures
foodstuffthatcanbeheatedatthespecifiedtemperatureforanexpecteddurationand
couldleadthereforetosuccessfulsterilisation.ThecontrolsareimplementedonaPLC
(programmablelogiccontroller)foraffordability,reliability,androbustnessandthe
operationsaresupervisedusingawebbasedSCADA(supervisorycontrolanddata
acquisition)systemforremotelysupervisorymonitoringandcontrol.
Keywords
Fuzzycontrol;F0value;Onlineupdation;PLC;Sterilisation;Thermalprocess
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Copyright©2015AsianAgriculturalandBiologicalEngineeringAssociation.PublishedbyElsevierB.V.All
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