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Please use this identifier to cite or link to this item: https://ptsldigital.ukm.my/jspui/handle/123456789/579010
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dc.contributor.authorAli Ghahraei (UPM)
dc.contributor.authorNurul Amziah Md Yunus (UPM)
dc.contributor.authorIzhal Abdul Halin (UPM)
dc.contributor.authorNasri Sulaiman (UPM)
dc.date.accessioned2023-11-06T03:12:31Z-
dc.date.available2023-11-06T03:12:31Z-
dc.date.issued2017-02
dc.identifier.issn0128-7680
dc.identifier.otherukmvital:116390
dc.identifier.urihttps://ptsldigital.ukm.my/jspui/handle/123456789/579010-
dc.descriptionControlled humidity environment is of significance in many scientific researches and experiments. In most laboratory-scale atmospheric chambers, an electrical temperature-based control system is used to adjust humidity. Since these chambers are not affordable in every laboratory, other low cost chambers using nitrogen gas or silica gel are used to adjust humidity. In this paper, a mechanism was developed to control the relative humidity in closed lab-scale chambers. Humidification is done by spraying water through a blower fan while de-humidification is by pumping air through silica gel as well as nitrogen gas injection. A Mamdani type fuzzy controller was designed to control the components and relative humidity. The results show the proposed system and controller can adjust and maintain relative humidity from 41% to 100% with maximum overshoot of 1% and the maximum range of error of steady state of 1.2 %.
dc.language.isoen
dc.publisherUniversiti Putra Malaysia Press
dc.relation.haspartPertanika Journals
dc.relation.urihttp://www.pertanika.upm.edu.my/regular_issues.php?jtype=2&journal=JST-25-S-2
dc.rightsUKM
dc.subjectAtmospheric chamber
dc.subjectHumidity
dc.subjectSilica gel
dc.subjectNitrogen gas
dc.subjectFuzzy controller
dc.titleFuzzy-controlled humidity variation by silica gel and nitrogen gas in an atmospheric chamber
dc.typeJournal Article
dc.format.volume25
dc.format.pages133-142
dc.format.issueSpecial Issue
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