{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/26901"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/26901","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"A precision autonomous parachute delivery system","abstract":"Based on previous projects within the author's engineering group and his own experience as a sport parachute jumper, a robotic parachute system was designed and flight tests were conducted to evaluate flight performance in deep brakes, for eventual use in autonomous accuracy landing approaches for targets two meters in size or smaller. Numerous design improvements were evaluated and/or implemented, and additional improvements are suggested. Using the implemented system, flight tests gathered GPS data used to evaluate canopy glide ratio changes, stall characteristics, and in-flight rotational oscillations in deep brakes flight, a region of the flight envelope not used in previous work. Results show that the low-porosity canopy used exhibits adequate glide ratio changes for closed loop glide path control, but has poor stability in deep brakes flight. The investigation suggests that canopies with higher porosity fabrics would perform superbly.","abstract_html":"Based on previous projects within the author's engineering group and his own experience as a sport parachute jumper, a robotic parachute system was designed and flight tests were conducted to evaluate flight performance in deep brakes, for eventual use in autonomous accuracy landing approaches for targets two meters in size or smaller. Numerous design improvements were evaluated and/or implemented, and additional improvements are suggested. Using the implemented system, flight tests gathered GPS data used to evaluate canopy glide ratio changes, stall characteristics, and in-flight rotational oscillations in deep brakes flight, a region of the flight envelope not used in previous work. Results show that the low-porosity canopy used exhibits adequate glide ratio changes for closed loop glide path control, but has poor stability in deep brakes flight. The investigation suggests that canopies with higher porosity fabrics would perform superbly.","abstract_has_math":false,"creators":["Bleck, Olaf, 1967-"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Dept. of Mechanical Engineering.","school":null,"contributors":[],"advisors":["Brent Appleby."],"committee_chairs":[],"committee_members":[],"year":2003,"date_issued":"2003","date_published":"2003","updated_at":"2026-07-22T22:21:22Z","subjects":["Mechanical Engineering."],"languages":["en_US"],"rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1721.1/26901","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Brent Appleby."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. 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Numerous design improvements were evaluated and/or implemented, and additional improvements are suggested. Using the implemented system, flight tests gathered GPS data used to evaluate canopy glide ratio changes, stall characteristics, and in-flight rotational oscillations in deep brakes flight, a region of the flight envelope not used in previous work. Results show that the low-porosity canopy used exhibits adequate glide ratio changes for closed loop glide path control, but has poor stability in deep brakes flight. The investigation suggests that canopies with higher porosity fabrics would perform superbly."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.M."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["A precision autonomous parachute delivery system"]}]}],"canonical_facts":{"dc:contributor.advisor":["Brent Appleby."],"dc:contributor.department":["Massachusetts Institute of Technology. Dept. of Mechanical Engineering."],"dc:contributor.other":["Massachusetts Institute of Technology. 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Using the implemented system, flight tests gathered GPS data used to evaluate canopy glide ratio changes, stall characteristics, and in-flight rotational oscillations in deep brakes flight, a region of the flight envelope not used in previous work. Results show that the low-porosity canopy used exhibits adequate glide ratio changes for closed loop glide path control, but has poor stability in deep brakes flight. The investigation suggests that canopies with higher porosity fabrics would perform superbly."],"dc:description.degree":["S.M."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["http://hdl.handle.net/1721.1/26901"],"dc:language.iso":["en_US"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. 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