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dc.contributor.advisorMacnab, Christopher
dc.contributor.advisorSiegler, Hector
dc.contributor.authorWang, Yiyang
dc.date.accessioned2015-04-20T21:28:30Z
dc.date.available2015-06-22T07:00:42Z
dc.date.issued2015-04-20
dc.date.submitted2015en
dc.identifier.citationWang, Y. (2015). Stable Adaptive Fuzzy Control of Wastewater Treatment Plants (Unpublished master's thesis). University of Calgary, Calgary, AB. doi:10.11575/PRISM/27866en_US
dc.identifier.urihttp://hdl.handle.net/11023/2145
dc.description.abstractA biological process is an essential secondary treatment in wastewater treatment, where bacteria degrade organic substances. It is referred to as an activated sludge process. Two models in this thesis are selected to represent an activated sludge process. One is a 4 *4 model and the other is the benchmark Activated Sludge Model no.1 (ASM1). The main objective of this thesis is to design and develop an adaptive fuzzy controller to control an activated sludge process with unknown influent flow and disturbances. Lyapunov’s direct method is used for theoretically analyzing the dynamic system with control. The fuzzy system works as a nonlinear approximator, and an adaptive control is designed to adapt the parameters of the fuzzy sets in order to guarantee stability. A supervisory control is developed to improve the performance of the fuzzy approximator. Also, parameter projection is used for the adaptive parameters to ensure robustness to disturbances by bounding the parameter growth. Simulations of the control with both activated sludge models show improved performance compared to PI controls.en_US
dc.language.isoeng
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectEngineering--Automotive
dc.subjectEngineering--Chemical
dc.subjectEngineering--Electronics and Electrical
dc.subject.classificationLyapunov Stability Functionen_US
dc.subject.classificationAdaptive Fuzzy Controlen_US
dc.subject.classificationRobust Controlen_US
dc.titleStable Adaptive Fuzzy Control of Wastewater Treatment Plants
dc.typemaster thesis
dc.publisher.facultyGraduate Studies
dc.publisher.institutionUniversity of Calgaryen
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/27866
thesis.degree.nameMaster of Science
thesis.degree.nameMS
thesis.degree.nameMSc
thesis.degree.disciplineElectrical and Computer Engineering
thesis.degree.grantorUniversity of Calgary
atmire.migration.oldid3077
dc.publisher.placeCalgaryen


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