{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/113230"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/113230","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Multidisciplinary design optimization of an eVTOL aircraft using analytical target cascading","abstract":"This thesis aims to develop a multidisciplinary design optimization framework for the design of complex multidomain system-of-systems. Analytical Target Cascading (ATC) is a design approach for establishing system-level consistency across independently designed subcomponents via coupled analysis and design. In this work, a hierarchical decomposition approach is introduced for the integration of preliminary sizing as well as various component level design and optimization models of a fully electric vertical takeoff and landing (eVTOL) vehicle. Analytical models for eVTOL subsystems are discussed, and various strategies for efficient application of ATC coordination between individual optimization processes for coherent integration across the systems are explored. A partitioned design optimization problem for a Lift+Cruise eVTOL is formulated and solved for the minimum vehicle weight, wherein the lifting surfaces (wing) and the propulsion units (propeller and motor) are designed separately as individual optimization subproblems. The augmented Lagrangian relaxation method is used to enforce consistency among shared design specifications across the overall system. Applying ATC provides the opportunity to isolate individual components of a complex system, establishes common interfaces across different disciplines and minimizes the risk of inconsistency between independently designed subsystems.","abstract_html":"This thesis aims to develop a multidisciplinary design optimization framework for the design of complex multidomain system-of-systems. Analytical Target Cascading (ATC) is a design approach for establishing system-level consistency across independently designed subcomponents via coupled analysis and design. In this work, a hierarchical decomposition approach is introduced for the integration of preliminary sizing as well as various component level design and optimization models of a fully electric vertical takeoff and landing (eVTOL) vehicle. Analytical models for eVTOL subsystems are discussed, and various strategies for efficient application of ATC coordination between individual optimization processes for coherent integration across the systems are explored. A partitioned design optimization problem for a Lift+Cruise eVTOL is formulated and solved for the minimum vehicle weight, wherein the lifting surfaces (wing) and the propulsion units (propeller and motor) are designed separately as individual optimization subproblems. The augmented Lagrangian relaxation method is used to enforce consistency among shared design specifications across the overall system. Applying ATC provides the opportunity to isolate individual components of a complex system, establishes common interfaces across different disciplines and minimizes the risk of inconsistency between independently designed subsystems.","abstract_has_math":false,"creators":["Das, Ghanendra Kumar"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["James, Kai A"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2022,"date_issued":"2022-01-12T22:35:26Z","date_published":"2022-01-12T22:35:26Z","updated_at":"2026-07-22T22:24:53Z","subjects":["eVTOL","MDO","Multidisciplinary Design Optimization","ATC","Analytical Target Cascading","electric vertical takeoff and landing","decomposition","partition"],"languages":["en"],"rights":["Copyright 2021 Ghanendra Das"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/113230","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["James, Kai A"]},{"key":"dc:creator","label":"Author","values":["Das, Ghanendra Kumar"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2022-01-12T22:35:26Z","2024-01-12T22:35:30Z","2021-07-23","2021-08"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Aerospace Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"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":["eVTOL","MDO","Multidisciplinary Design Optimization","ATC","Analytical Target Cascading","electric vertical takeoff and landing","decomposition","partition"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2021 Ghanendra Das"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/113230"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This thesis aims to develop a multidisciplinary design optimization framework for the design of complex multidomain system-of-systems. Analytical Target Cascading (ATC) is a design approach for establishing system-level consistency across independently designed subcomponents via coupled analysis and design. In this work, a hierarchical decomposition approach is introduced for the integration of preliminary sizing as well as various component level design and optimization models of a fully electric vertical takeoff and landing (eVTOL) vehicle. Analytical models for eVTOL subsystems are discussed, and various strategies for efficient application of ATC coordination between individual optimization processes for coherent integration across the systems are explored. A partitioned design optimization problem for a Lift+Cruise eVTOL is formulated and solved for the minimum vehicle weight, wherein the lifting surfaces (wing) and the propulsion units (propeller and motor) are designed separately as individual optimization subproblems. The augmented Lagrangian relaxation method is used to enforce consistency among shared design specifications across the overall system. Applying ATC provides the opportunity to isolate individual components of a complex system, establishes common interfaces across different disciplines and minimizes the risk of inconsistency between independently designed subsystems.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-08-01","The student, Ghanendra Das, accepted the attached license on 2021-07-23 at 15:16.","The student, Ghanendra Das, submitted this Thesis for approval on 2021-07-23 at 15:17.","This Thesis was approved for publication on 2021-07-23 at 15:27.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17089 on 2022-01-12 at 12:55:47","Made available in DSpace on 2022-01-12T22:35:26Z (GMT). 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Analytical Target Cascading (ATC) is a design approach for establishing system-level consistency across independently designed subcomponents via coupled analysis and design. In this work, a hierarchical decomposition approach is introduced for the integration of preliminary sizing as well as various component level design and optimization models of a fully electric vertical takeoff and landing (eVTOL) vehicle. Analytical models for eVTOL subsystems are discussed, and various strategies for efficient application of ATC coordination between individual optimization processes for coherent integration across the systems are explored. A partitioned design optimization problem for a Lift+Cruise eVTOL is formulated and solved for the minimum vehicle weight, wherein the lifting surfaces (wing) and the propulsion units (propeller and motor) are designed separately as individual optimization subproblems. The augmented Lagrangian relaxation method is used to enforce consistency among shared design specifications across the overall system. Applying ATC provides the opportunity to isolate individual components of a complex system, establishes common interfaces across different disciplines and minimizes the risk of inconsistency between independently designed subsystems.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-08-01","The student, Ghanendra Das, accepted the attached license on 2021-07-23 at 15:16.","The student, Ghanendra Das, submitted this Thesis for approval on 2021-07-23 at 15:17.","This Thesis was approved for publication on 2021-07-23 at 15:27.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17089 on 2022-01-12 at 12:55:47","Made available in DSpace on 2022-01-12T22:35:26Z (GMT). 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