{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/5486"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/5486","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"Longitudinal stability and control analysis and parameter sensitivity investigation of fixed wing aircraft in ground proximity using various aerodynamic approaches","abstract":"The investigation of the stability of longitudinal motion of fixed wing aircraft in ground proximity presented here focuses on rectangular wing and tail configurations similar to that of the Piper Cherokee PA-28-180. The majority of our results pertain to the height range down to one quarter of the wing span, and th main objectives of the investigation were the following: to reveal the physical nature and causes of the instability encountered in the close ground proximity; to assess the influence the design parameters such as the centre of the mass placement, tail length, tail height and wing aspect ration have on the stability of longitudinal motion; and to suggest a feedback control strategy that would alleviate the instability.","abstract_html":"The investigation of the stability of longitudinal motion of fixed wing aircraft in ground proximity presented here focuses on rectangular wing and tail configurations similar to that of the Piper Cherokee PA-28-180. The majority of our results pertain to the height range down to one quarter of the wing span, and th main objectives of the investigation were the following: to reveal the physical nature and causes of the instability encountered in the close ground proximity; to assess the influence the design parameters such as the centre of the mass placement, tail length, tail height and wing aspect ration have on the stability of longitudinal motion; and to suggest a feedback control strategy that would alleviate the instability.","abstract_has_math":false,"creators":["Pienaar, D van V"],"institution":"Department of Mechanical Engineering","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Redelinghuys, Christiaan"],"committee_chairs":[],"committee_members":[],"year":2000,"date_issued":"2000","date_published":"2000","updated_at":"2026-07-22T22:23:14Z","subjects":[],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/5486","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Redelinghuys, Christiaan"]},{"key":"dc:creator","label":"Author","values":["Pienaar, D van V"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-07-31T11:19:05Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-07-31T11:19:05Z"]},{"key":"dc:date.issued","label":"Date","values":["2000"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Mechanical Engineering"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Cape Town"]},{"key":"dc:type","label":"Dc Type","values":["Doctoral Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Doctoral"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["PhD"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/5486"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Summary in English."]},{"key":"dc:description.abstract","label":"Abstract","values":["The investigation of the stability of longitudinal motion of fixed wing aircraft in ground proximity presented here focuses on rectangular wing and tail configurations similar to that of the Piper Cherokee PA-28-180. The majority of our results pertain to the height range down to one quarter of the wing span, and th main objectives of the investigation were the following: to reveal the physical nature and causes of the instability encountered in the close ground proximity; to assess the influence the design parameters such as the centre of the mass placement, tail length, tail height and wing aspect ration have on the stability of longitudinal motion; and to suggest a feedback control strategy that would alleviate the instability."]},{"key":"dc:title","label":"Title","values":["Longitudinal stability and control analysis and parameter sensitivity investigation of fixed wing aircraft in ground proximity using various aerodynamic approaches"]}]}],"canonical_facts":{"dc:contributor.advisor":["Redelinghuys, Christiaan"],"dc:creator":["Pienaar, D van V"],"dc:date.accessioned":["2014-07-31T11:19:05Z"],"dc:date.available":["2014-07-31T11:19:05Z"],"dc:date.issued":["2000"],"dc:description":["Summary in English."],"dc:description.abstract":["The investigation of the stability of longitudinal motion of fixed wing aircraft in ground proximity presented here focuses on rectangular wing and tail configurations similar to that of the Piper Cherokee PA-28-180. The majority of our results pertain to the height range down to one quarter of the wing span, and th main objectives of the investigation were the following: to reveal the physical nature and causes of the instability encountered in the close ground proximity; to assess the influence the design parameters such as the centre of the mass placement, tail length, tail height and wing aspect ration have on the stability of longitudinal motion; and to suggest a feedback control strategy that would alleviate the instability."],"dc:identifier.uri":["http://hdl.handle.net/11427/5486"],"dc:language.iso":["eng"],"dc:publisher.department":["Department of Mechanical Engineering"],"dc:publisher.institution":["University of Cape Town"],"dc:title":["Longitudinal stability and control analysis and parameter sensitivity investigation of fixed wing aircraft in ground proximity using various aerodynamic approaches"],"dc:type":["Doctoral Thesis"],"dc:type.qualificationlevel":["Doctoral"],"dc:type.qualificationname":["PhD"]},"updated_at":"2026-07-22T22:23:14Z"}