{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/115817"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/115817","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Performance assessment of Mars entry systems with flap-based trajectory control","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-14 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-14 without embargo terms","abstract_has_math":false,"creators":["Engel, Daniel Louis"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["Putnam, Zachary R"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2022,"date_issued":"2022-05","date_published":"2022-05","updated_at":"2026-07-22T22:24:55Z","subjects":["DFC","Entry","Planetary entry","descent and landing","EDL","Hypersonic","Hypersonic flaps","Flaps","Flap-steering","Entry vehicle control surfaces","Bank-angle steering","Direct force control","Aerodynamic control authority","Range capability","Response time","Aerodynamic trim","Flight mechanics","Guidance","navigation and control","GNC"],"languages":["en","eng"],"rights":["Copyright 2022 by Daniel L. Engel"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/115817","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Putnam, Zachary R"]},{"key":"dc:creator","label":"Author","values":["Engel, Daniel Louis"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2022-05","2022-04-26"]},{"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":["DFC","Entry","Planetary entry","descent and landing","EDL","Hypersonic","Hypersonic flaps","Flaps","Flap-steering","Entry vehicle control surfaces","Bank-angle steering","Direct force control","Aerodynamic control authority","Range capability","Response time","Aerodynamic trim","Flight mechanics","Guidance","navigation and control","GNC"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2022 by Daniel L. Engel"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/115817"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-14 without embargo terms","The student, Daniel Engel, accepted the attached license on 2022-04-19 at 13:26.","The student, Daniel Engel, submitted this Thesis for approval on 2022-04-19 at 14:29.","This Thesis was approved for publication on 2022-04-26 at 11:42.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17807 on 2022-11-14 at 17:33:56","Previous Mars entry, descent, and landing systems have utilized bank-angle steering during the hypersonic phase of entry to control range. An alternate solution for hypersonic steering is a set of independently-articulated aerodynamic flaps. Deflecting these flaps results in trim at non-zero angles of attack and sideslip angles, enabling the vehicle to generate lift in arbitrary directions. This study compares current state-of-the-art bank-angle steering to flap-based steering across several theoretical performance metrics, including aerodynamic control authority, range capability, and response time. The concepts of effective bank angle and effective lift-to-drag ratio are developed to compare the control authority between flap configurations and to bank-angle steering systems. The shape of the non-axisymmetric control authority depends on the flap placement, area, and number of flaps, however flap-based steering systems likely require a mechanism for roll or bank in order to have a uniform control authority. Aerodynamic control authority is also mapped to a range capability. Flap-steering vehicles exhibit range capabilities with markedly different shapes relative to bank-angle steering vehicles with equivalent maximum hypersonic lift-to-drag ratios. For near-equivalent attitude maneuvers, flap steering vehicles are found to be able to rotate directly between angular positions and have both a more uniform and faster response time relative to bank-angle steering vehicles."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Performance assessment of Mars entry systems with flap-based trajectory control"]}]}],"canonical_facts":{"dc:contributor":["Putnam, Zachary R"],"dc:creator":["Engel, Daniel Louis"],"dc:date":["2022-05","2022-04-26"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-14 without embargo terms","The student, Daniel Engel, accepted the attached license on 2022-04-19 at 13:26.","The student, Daniel Engel, submitted this Thesis for approval on 2022-04-19 at 14:29.","This Thesis was approved for publication on 2022-04-26 at 11:42.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17807 on 2022-11-14 at 17:33:56","Previous Mars entry, descent, and landing systems have utilized bank-angle steering during the hypersonic phase of entry to control range. An alternate solution for hypersonic steering is a set of independently-articulated aerodynamic flaps. Deflecting these flaps results in trim at non-zero angles of attack and sideslip angles, enabling the vehicle to generate lift in arbitrary directions. This study compares current state-of-the-art bank-angle steering to flap-based steering across several theoretical performance metrics, including aerodynamic control authority, range capability, and response time. The concepts of effective bank angle and effective lift-to-drag ratio are developed to compare the control authority between flap configurations and to bank-angle steering systems. The shape of the non-axisymmetric control authority depends on the flap placement, area, and number of flaps, however flap-based steering systems likely require a mechanism for roll or bank in order to have a uniform control authority. Aerodynamic control authority is also mapped to a range capability. Flap-steering vehicles exhibit range capabilities with markedly different shapes relative to bank-angle steering vehicles with equivalent maximum hypersonic lift-to-drag ratios. For near-equivalent attitude maneuvers, flap steering vehicles are found to be able to rotate directly between angular positions and have both a more uniform and faster response time relative to bank-angle steering vehicles."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/115817"],"dc:language":["en","eng"],"dc:rights":["Copyright 2022 by Daniel L. Engel"],"dc:subject":["DFC","Entry","Planetary entry","descent and landing","EDL","Hypersonic","Hypersonic flaps","Flaps","Flap-steering","Entry vehicle control surfaces","Bank-angle steering","Direct force control","Aerodynamic control authority","Range capability","Response time","Aerodynamic trim","Flight mechanics","Guidance","navigation and control","GNC"],"dc:title":["Performance assessment of Mars entry systems with flap-based trajectory control"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Aerospace Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:55Z"}