{"id":{"repo_id":"lund","oai_identifier":"oai:lup.lub.lu.se:a1c9b8b3-beab-4b11-a325-cb28cdff588f"},"canonical_url":"https://search.dev.ndltd.org/etd/lund/oai:lup.lub.lu.se:a1c9b8b3-beab-4b11-a325-cb28cdff588f","repository":{"repo_id":"lund","name":"University of Lund","base_url":"https://lup.lub.lu.se/oai"},"display":{"title":"Active Stabilization of Thermoacoustic Oscillation","abstract":"Combustion processes serve as important sources of energy for both power generation and for transport, ranging from large scale power stations to micro turbines and aeroplane engines. Lean premixed combustion offers a potential to reduce the emission levels, but suffers from instability problems which can be overcome by the use of active control. This thesis addresses the problem of actively controlling thermoacoustic instabilities in a laboratory test com- bustion chamber. Different strategies for actuation are discussed and evaluated experimentally. Relations to industrial relevance are taken into consideration, and a fuel actuator is developed and implemented. Experiments confirm the general view within the combustion control community that actuator design is a significant challenge and limitation for the success of active combustion control. The dynamics of the different configurations of the combustion chambers is modeled using both analytical methods and system identification methods. System identification shows the best potential to be transfered to more sophisticated combustion chambers. Successful damping of the combustion oscillations is shown with different control design methods. The most convincing results are obtained with a Kalman filter based LQR control design.","abstract_html":"Combustion processes serve as important sources of energy for both power generation and for transport, ranging from large scale power stations to micro turbines and aeroplane engines. Lean premixed combustion offers a potential to reduce the emission levels, but suffers from instability problems which can be overcome by the use of active control. This thesis addresses the problem of actively controlling thermoacoustic instabilities in a laboratory test com- bustion chamber. Different strategies for actuation are discussed and evaluated experimentally. Relations to industrial relevance are taken into consideration, and a fuel actuator is developed and implemented. Experiments confirm the general view within the combustion control community that actuator design is a significant challenge and limitation for the success of active combustion control. The dynamics of the different configurations of the combustion chambers is modeled using both analytical methods and system identification methods. System identification shows the best potential to be transfered to more sophisticated combustion chambers. Successful damping of the combustion oscillations is shown with different control design methods. The most convincing results are obtained with a Kalman filter based LQR control design.","abstract_has_math":false,"creators":["Kjaer, Martin Ansbjerg"],"institution":"Department of Automatic Control, Lund Institute of Technology, Lund University","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2005,"date_issued":"2005","date_published":"2005","updated_at":"2026-07-24T03:00:02Z","subjects":["Control Engineering","subspace–based identification","fuel actuation","thermoacoustic instability","LQR","Active control"],"languages":["eng"],"rights":["info:eu-repo/semantics/openAccess"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://lup.lub.lu.se/record/1043974","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Kjaer, Martin Ansbjerg"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2005"]},{"key":"dc:publisher","label":"Institution","values":["Department of Automatic Control, Lund Institute of Technology, Lund University"]},{"key":"dc:type","label":"Dc Type","values":["thesis/licentiatethesis","info:eu-repo/semantics/other","text"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Control Engineering","subspace–based identification","fuel actuation","thermoacoustic instability","LQR","Active control"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["info:eu-repo/semantics/openAccess"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://lup.lub.lu.se/record/1043974","https://portal.research.lu.se/files/4627303/8682382.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Combustion processes serve as important sources of energy for both power generation and for transport, ranging from large scale power stations to micro turbines and aeroplane engines. Lean premixed combustion offers a potential to reduce the emission levels, but suffers from instability problems which can be overcome by the use of active control. This thesis addresses the problem of actively controlling thermoacoustic instabilities in a laboratory test com- bustion chamber. Different strategies for actuation are discussed and evaluated experimentally. Relations to industrial relevance are taken into consideration, and a fuel actuator is developed and implemented. Experiments confirm the general view within the combustion control community that actuator design is a significant challenge and limitation for the success of active combustion control. The dynamics of the different configurations of the combustion chambers is modeled using both analytical methods and system identification methods. System identification shows the best potential to be transfered to more sophisticated combustion chambers. Successful damping of the combustion oscillations is shown with different control design methods. The most convincing results are obtained with a Kalman filter based LQR control design."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:source","label":"Dc Source","values":["Research Reports TFRT-3239; (2005)","ISSN: 0280-5316"]},{"key":"dc:title","label":"Title","values":["Active Stabilization of Thermoacoustic Oscillation"]}]}],"canonical_facts":{"dc:creator":["Kjaer, Martin Ansbjerg"],"dc:date":["2005"],"dc:description":["Combustion processes serve as important sources of energy for both power generation and for transport, ranging from large scale power stations to micro turbines and aeroplane engines. Lean premixed combustion offers a potential to reduce the emission levels, but suffers from instability problems which can be overcome by the use of active control. This thesis addresses the problem of actively controlling thermoacoustic instabilities in a laboratory test com- bustion chamber. Different strategies for actuation are discussed and evaluated experimentally. Relations to industrial relevance are taken into consideration, and a fuel actuator is developed and implemented. Experiments confirm the general view within the combustion control community that actuator design is a significant challenge and limitation for the success of active combustion control. The dynamics of the different configurations of the combustion chambers is modeled using both analytical methods and system identification methods. System identification shows the best potential to be transfered to more sophisticated combustion chambers. Successful damping of the combustion oscillations is shown with different control design methods. The most convincing results are obtained with a Kalman filter based LQR control design."],"dc:format":["application/pdf"],"dc:identifier":["https://lup.lub.lu.se/record/1043974","https://portal.research.lu.se/files/4627303/8682382.pdf"],"dc:language":["eng"],"dc:publisher":["Department of Automatic Control, Lund Institute of Technology, Lund University"],"dc:rights":["info:eu-repo/semantics/openAccess"],"dc:source":["Research Reports TFRT-3239; (2005)","ISSN: 0280-5316"],"dc:subject":["Control Engineering","subspace–based identification","fuel actuation","thermoacoustic instability","LQR","Active control"],"dc:title":["Active Stabilization of Thermoacoustic Oscillation"],"dc:type":["thesis/licentiatethesis","info:eu-repo/semantics/other","text"]},"updated_at":"2026-07-24T03:00:02Z"}