{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/101133"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/101133","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Development and implementation of a multi-axial real-time hybrid simulation framework","abstract":"Real-time hybrid simulation is an efficient and cost-effective experimental testing technique for performance evaluation of structural systems subjected to earthquake loading with rate-dependent behavior. To assess the response of structural components with multi-axial loading, a loading assembly with multiple parallel actuators connected to a rigid moving platform is required to impose realistic boundary conditions on physical components. This loading assembly is expected to exhibit significant dynamic actuator coupling and suffer from systematic errors and potential instabilities. One approach to reduce experimental errors considers a multi-input, multi-output (MIMO) modeling approach to design controllers that could compensate for these undesired effects. In this dissertation, a framework for three-dimensional, multi-axial real-time hybrid simulation is presented. The methodology consists in designing a real-time system platform to perform dynamic test experiments by controlling the interface boundary conditions on the physical specimen in Cartesian (global) coordinates. First, a kinematic transformation is derived to impose the six-degree-of-freedom motion to the loading platform in three-dimensional Cartesian space. Then, a linearized model of the multi-actuator loading assembly is obtained through nonparametric frequency domain system identification techniques. Subsequently, a feedforward-feedback compensator is developed for reference tracking of the multivariate transient signals, which should be sufficiently robust to rule out any disturbances and measurement noises in the experimental closed-loop system. Finally, the numerical substructure, compensators, and kinematic transformations are implemented over an embedded system with a micro-controller unit and digital signal processing capabilities for real-time applications. The proposed framework is validated using a small-scale version of the Load and Boundary Condition Box (LBCB) from Newmark Civil Engineering Laboratory at University of Illinois, Urbana-Champaign. A one-story, two-bay, moment frame was considered as the reference structure, where the experimental substructure was chosen as a steel column with fixed ends. The hybrid system was subjected to earthquake ground motions chosen according to its importance and destructive characteristics. Comparisons of different compensation strategies are made, and excellent performance is achieved for all situations that incorporates the multivariate controller.","abstract_html":"Real-time hybrid simulation is an efficient and cost-effective experimental testing technique for performance evaluation of structural systems subjected to earthquake loading with rate-dependent behavior. To assess the response of structural components with multi-axial loading, a loading assembly with multiple parallel actuators connected to a rigid moving platform is required to impose realistic boundary conditions on physical components. This loading assembly is expected to exhibit significant dynamic actuator coupling and suffer from systematic errors and potential instabilities. One approach to reduce experimental errors considers a multi-input, multi-output (MIMO) modeling approach to design controllers that could compensate for these undesired effects. In this dissertation, a framework for three-dimensional, multi-axial real-time hybrid simulation is presented. The methodology consists in designing a real-time system platform to perform dynamic test experiments by controlling the interface boundary conditions on the physical specimen in Cartesian (global) coordinates. First, a kinematic transformation is derived to impose the six-degree-of-freedom motion to the loading platform in three-dimensional Cartesian space. Then, a linearized model of the multi-actuator loading assembly is obtained through nonparametric frequency domain system identification techniques. Subsequently, a feedforward-feedback compensator is developed for reference tracking of the multivariate transient signals, which should be sufficiently robust to rule out any disturbances and measurement noises in the experimental closed-loop system. Finally, the numerical substructure, compensators, and kinematic transformations are implemented over an embedded system with a micro-controller unit and digital signal processing capabilities for real-time applications. The proposed framework is validated using a small-scale version of the Load and Boundary Condition Box (LBCB) from Newmark Civil Engineering Laboratory at University of Illinois, Urbana-Champaign. A one-story, two-bay, moment frame was considered as the reference structure, where the experimental substructure was chosen as a steel column with fixed ends. The hybrid system was subjected to earthquake ground motions chosen according to its importance and destructive characteristics. Comparisons of different compensation strategies are made, and excellent performance is achieved for all situations that incorporates the multivariate controller.","abstract_has_math":false,"creators":["Fermandois Cornejo, Gaston Andres"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":["Spencer Jr., Billie F.","Elnashai, Amr S.","Fahnestock, Larry A.","Johnson, Erik A.","Dyke, Shirley J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-09-04T20:33:56Z","date_published":"2018-09-04T20:33:56Z","updated_at":"2026-07-22T22:24:38Z","subjects":["real-time hybrid simulation","multiple actuators","dynamic coupling","kinematic transformations","model-based compensation"],"languages":["en"],"rights":["Copyright 2018 Gaston Andres Fermandois Cornejo"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/101133","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Spencer Jr., Billie F.","Elnashai, Amr S.","Fahnestock, Larry A.","Johnson, Erik A.","Dyke, Shirley J."]},{"key":"dc:creator","label":"Author","values":["Fermandois Cornejo, Gaston Andres"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-09-04T20:33:56Z","2020-09-05T09:15:20Z","2018-04-15","2018-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["real-time hybrid simulation","multiple actuators","dynamic coupling","kinematic transformations","model-based compensation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2018 Gaston Andres Fermandois Cornejo"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/101133"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Real-time hybrid simulation is an efficient and cost-effective experimental testing technique for performance evaluation of structural systems subjected to earthquake loading with rate-dependent behavior. To assess the response of structural components with multi-axial loading, a loading assembly with multiple parallel actuators connected to a rigid moving platform is required to impose realistic boundary conditions on physical components. This loading assembly is expected to exhibit significant dynamic actuator coupling and suffer from systematic errors and potential instabilities. One approach to reduce experimental errors considers a multi-input, multi-output (MIMO) modeling approach to design controllers that could compensate for these undesired effects. In this dissertation, a framework for three-dimensional, multi-axial real-time hybrid simulation is presented. The methodology consists in designing a real-time system platform to perform dynamic test experiments by controlling the interface boundary conditions on the physical specimen in Cartesian (global) coordinates. First, a kinematic transformation is derived to impose the six-degree-of-freedom motion to the loading platform in three-dimensional Cartesian space. Then, a linearized model of the multi-actuator loading assembly is obtained through nonparametric frequency domain system identification techniques. Subsequently, a feedforward-feedback compensator is developed for reference tracking of the multivariate transient signals, which should be sufficiently robust to rule out any disturbances and measurement noises in the experimental closed-loop system. Finally, the numerical substructure, compensators, and kinematic transformations are implemented over an embedded system with a micro-controller unit and digital signal processing capabilities for real-time applications. The proposed framework is validated using a small-scale version of the Load and Boundary Condition Box (LBCB) from Newmark Civil Engineering Laboratory at University of Illinois, Urbana-Champaign. A one-story, two-bay, moment frame was considered as the reference structure, where the experimental substructure was chosen as a steel column with fixed ends. The hybrid system was subjected to earthquake ground motions chosen according to its importance and destructive characteristics. Comparisons of different compensation strategies are made, and excellent performance is achieved for all situations that incorporates the multivariate controller.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01","The student, Gaston Fermandois Cornejo, accepted the attached license on 2018-04-14 at 11:19.","The student, Gaston Fermandois Cornejo, submitted this Dissertation for approval on 2018-04-14 at 13:49.","This Dissertation was approved for publication on 2018-04-15 at 10:40.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12096 on 2018-08-31 at 17:17:54","Made available in DSpace on 2018-09-04T20:33:56Z (GMT). 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To assess the response of structural components with multi-axial loading, a loading assembly with multiple parallel actuators connected to a rigid moving platform is required to impose realistic boundary conditions on physical components. This loading assembly is expected to exhibit significant dynamic actuator coupling and suffer from systematic errors and potential instabilities. One approach to reduce experimental errors considers a multi-input, multi-output (MIMO) modeling approach to design controllers that could compensate for these undesired effects. In this dissertation, a framework for three-dimensional, multi-axial real-time hybrid simulation is presented. The methodology consists in designing a real-time system platform to perform dynamic test experiments by controlling the interface boundary conditions on the physical specimen in Cartesian (global) coordinates. First, a kinematic transformation is derived to impose the six-degree-of-freedom motion to the loading platform in three-dimensional Cartesian space. Then, a linearized model of the multi-actuator loading assembly is obtained through nonparametric frequency domain system identification techniques. Subsequently, a feedforward-feedback compensator is developed for reference tracking of the multivariate transient signals, which should be sufficiently robust to rule out any disturbances and measurement noises in the experimental closed-loop system. Finally, the numerical substructure, compensators, and kinematic transformations are implemented over an embedded system with a micro-controller unit and digital signal processing capabilities for real-time applications. The proposed framework is validated using a small-scale version of the Load and Boundary Condition Box (LBCB) from Newmark Civil Engineering Laboratory at University of Illinois, Urbana-Champaign. A one-story, two-bay, moment frame was considered as the reference structure, where the experimental substructure was chosen as a steel column with fixed ends. The hybrid system was subjected to earthquake ground motions chosen according to its importance and destructive characteristics. Comparisons of different compensation strategies are made, and excellent performance is achieved for all situations that incorporates the multivariate controller.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01","The student, Gaston Fermandois Cornejo, accepted the attached license on 2018-04-14 at 11:19.","The student, Gaston Fermandois Cornejo, submitted this Dissertation for approval on 2018-04-14 at 13:49.","This Dissertation was approved for publication on 2018-04-15 at 10:40.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12096 on 2018-08-31 at 17:17:54","Made available in DSpace on 2018-09-04T20:33:56Z (GMT). No. of bitstreams: 3 FERMANDOISCORNEJO-DISSERTATION-2018.pdf: 32453765 bytes, checksum: dfb14fc43079b186c8e0311c7ea5f7da (MD5) LICENSE.txt: 4222 bytes, checksum: 83189d25aadaf3e8d24b8fe75c917d07 (MD5) PROQUEST_LICENSE.txt: 4568 bytes, checksum: 945ffce6332a61e870eb05c33a3c730a (MD5) Previous issue date: 2018-04-15","Embargo set by: Seth Robbins for item 107216 Lift date: 2020-09-04T20:34:13Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","Embargo set by: Seth Robbins for item 107216 Lift date: 2020-09-04T20:37:00Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","Embargo set by: Seth Robbins for item 107216 Lift date: 2020-09-04T20:42:08Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only Restriction Lifted for Item 107216 on 2020-09-05T09:15:20Z."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/101133"],"dc:language":["en"],"dc:rights":["Copyright 2018 Gaston Andres Fermandois Cornejo"],"dc:subject":["real-time hybrid simulation","multiple actuators","dynamic coupling","kinematic transformations","model-based compensation"],"dc:title":["Development and implementation of a multi-axial real-time hybrid simulation framework"],"dc:type":["text"],"thesis:degree_discipline":["Civil Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:38Z"}