{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/101237"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/101237","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Impact evaluation of in-space additive manufacturing and recycling technologies for on-orbit servicing","abstract":"Made available in DSpace on 2018-09-04T20:42:00Z (GMT). No. of bitstreams: 2 SEARS-THESIS-2018.pdf: 502754 bytes, checksum: 9fc27d97554ffc268d11cbb6ddbe49d3 (MD5) LICENSE.txt: 4210 bytes, checksum: 0cc39aa6e04642f01c5b652b842fc32a (MD5) Previous issue date: 2018-04-27","abstract_html":"Made available in DSpace on 2018-09-04T20:42:00Z (GMT). No. of bitstreams: 2 SEARS-THESIS-2018.pdf: 502754 bytes, checksum: 9fc27d97554ffc268d11cbb6ddbe49d3 (MD5) LICENSE.txt: 4210 bytes, checksum: 0cc39aa6e04642f01c5b652b842fc32a (MD5) Previous issue date: 2018-04-27","abstract_has_math":false,"creators":["Sears, Patrick"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Aerospace Engineering","degree_department":null,"school":null,"contributors":["Ho, Koki"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-09-04T20:42:00Z","date_published":"2018-09-04T20:42:00Z","updated_at":"2026-07-22T22:24:38Z","subjects":["On-Orbit Servicing","Additive Manufacturing","Space Systems","Modularized Satellite","3D Printing","Simulation","Geostationary orbit"],"languages":["en"],"rights":["Copyright 2018 Patrick Sears"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/101237","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ho, Koki"]},{"key":"dc:creator","label":"Author","values":["Sears, Patrick"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-09-04T20:42:00Z","2020-09-05T09:15:13Z","2018-04-27","2018-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"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":["On-Orbit Servicing","Additive Manufacturing","Space Systems","Modularized Satellite","3D Printing","Simulation","Geostationary orbit"]}]},{"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 Patrick Sears"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/101237"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Made available in DSpace on 2018-09-04T20:42:00Z (GMT). No. of bitstreams: 2 SEARS-THESIS-2018.pdf: 502754 bytes, checksum: 9fc27d97554ffc268d11cbb6ddbe49d3 (MD5) LICENSE.txt: 4210 bytes, checksum: 0cc39aa6e04642f01c5b652b842fc32a (MD5) Previous issue date: 2018-04-27","Embargo set by: Seth Robbins for item 107322 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 107322 on 2020-09-05T09:15:13Z.","This thesis proposes an integrated simulation tool to evaluate the impact of future in-space additive manufacturing (ISAM) and recycling technologies on the responsiveness of an on-orbit servicing (OOS) infrastructure to random failures of satellites distributed over an orbit. The considered OOS infrastructure is composed of a mothership and a servicer (i.e., daughtership); the mothership serves as a depot for spares, whereas the servicer travels with the spares to randomly failed satellites and provides a service. All satellites are assumed to be modularized, and thus the service type considered within the infrastructure is the replacement of a failed module with a new spare one. Additionally, an ISAM facility can be added to the mothership, which can scavenge material that makes up the failed module. This obtained feedstock from failed modules, along with raw material supplied from Earth, could be used to manufacture a new spare. The key parameters in this analysis include the technology level of ISAM, in terms of the types of material it can manufacture, and the scavenge rate, defined as the percent of material mass able to be recycled from the failed module to the new module. The two metrics for evaluation are the required resupply launch mass to the mothership and the average waiting time of the satellites before it is serviced. Simulations results showed that the ISAM and recycling technology provides a large impact in terms of both reduction in resupply launch mass and responsiveness of its service to the randomly failed satellites.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01","The student, Patrick Sears, accepted the attached license on 2018-04-26 at 11:43.","The student, Patrick Sears, submitted this Thesis for approval on 2018-04-26 at 11:49.","This Thesis was approved for publication on 2018-04-27 at 09:12.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12522 on 2018-08-31 at 17:21:41"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Impact evaluation of in-space additive manufacturing and recycling technologies for on-orbit servicing"]}]}],"canonical_facts":{"dc:contributor":["Ho, Koki"],"dc:creator":["Sears, Patrick"],"dc:date":["2018-09-04T20:42:00Z","2020-09-05T09:15:13Z","2018-04-27","2018-05"],"dc:description":["Made available in DSpace on 2018-09-04T20:42:00Z (GMT). No. of bitstreams: 2 SEARS-THESIS-2018.pdf: 502754 bytes, checksum: 9fc27d97554ffc268d11cbb6ddbe49d3 (MD5) LICENSE.txt: 4210 bytes, checksum: 0cc39aa6e04642f01c5b652b842fc32a (MD5) Previous issue date: 2018-04-27","Embargo set by: Seth Robbins for item 107322 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 107322 on 2020-09-05T09:15:13Z.","This thesis proposes an integrated simulation tool to evaluate the impact of future in-space additive manufacturing (ISAM) and recycling technologies on the responsiveness of an on-orbit servicing (OOS) infrastructure to random failures of satellites distributed over an orbit. The considered OOS infrastructure is composed of a mothership and a servicer (i.e., daughtership); the mothership serves as a depot for spares, whereas the servicer travels with the spares to randomly failed satellites and provides a service. All satellites are assumed to be modularized, and thus the service type considered within the infrastructure is the replacement of a failed module with a new spare one. Additionally, an ISAM facility can be added to the mothership, which can scavenge material that makes up the failed module. This obtained feedstock from failed modules, along with raw material supplied from Earth, could be used to manufacture a new spare. The key parameters in this analysis include the technology level of ISAM, in terms of the types of material it can manufacture, and the scavenge rate, defined as the percent of material mass able to be recycled from the failed module to the new module. The two metrics for evaluation are the required resupply launch mass to the mothership and the average waiting time of the satellites before it is serviced. Simulations results showed that the ISAM and recycling technology provides a large impact in terms of both reduction in resupply launch mass and responsiveness of its service to the randomly failed satellites.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01","The student, Patrick Sears, accepted the attached license on 2018-04-26 at 11:43.","The student, Patrick Sears, submitted this Thesis for approval on 2018-04-26 at 11:49.","This Thesis was approved for publication on 2018-04-27 at 09:12.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12522 on 2018-08-31 at 17:21:41"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/101237"],"dc:language":["en"],"dc:rights":["Copyright 2018 Patrick Sears"],"dc:subject":["On-Orbit Servicing","Additive Manufacturing","Space Systems","Modularized Satellite","3D Printing","Simulation","Geostationary orbit"],"dc:title":["Impact evaluation of in-space additive manufacturing and recycling technologies for on-orbit servicing"],"dc:type":["text"],"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":"2026-07-22T22:24:38Z"}