Matches in SemOpenAlex for { <https://semopenalex.org/work/W1640136739> ?p ?o ?g. }
Showing items 1 to 69 of
69
with 100 items per page.
- W1640136739 abstract "When one or more main engines fail during ascent, the flight crew of the Space Shuttle must make several critical decisions and accurately perform a series of abort procedures. One of the most important decisions for many aborts is the selection ofa landing site. Several factors influence the ability to reach a landing site, including the spacecraft point of entry, the energy state at entry, the vehicle glide capability from that energy state, and whether one or more suitable landing sites are within the glide capability. Energy assessment is further complicated by the fact that phugoid oscillations in total energy influence glide capability. Once the glide capability is known, the crew must select the best site option based upon glide capability and landing site conditions and facilities. Since most of these factors cannot currently be assessed by the crew in flight, extensive planning is required prior to each mission to script a variety of procedures based upon spacecraft velocity at the point of engine failure (or failures). The results of this preflight planning are expressed in tables and diagrams on mission-specific cockpit checklists. Crew checklist procedures involve leafing through several pages of instructions and navigating a decision tree for site selection and flight procedures - all during a time critical abort situation. With the advent of the Cockpit Avionics Upgrade (CAU), the Shuttle will have increased on-board computational power to help alleviate crew workload during aborts and provide valuable situational awareness during nominal operations. One application baselined for the CAU computers is Shuttle Abort Flight Management (SAFM), whose requirements have been designed and prototyped. The SAFM application includes powered and glided flight algorithms. This paper describes the glided flight algorithm which is dispatched by SAFM to determine the vehicle glide capability and make recommendations to the crew for site selection as well as to monitor glide capability while in route to the selected site. Background is provided on Shuttle entry guidance as well as the various types of Shuttle aborts. SAFM entry requirements and cockpit disp lays are discussed briefly to provide background for Glided Flight algorithm design considerations. The central principal of the Glided Flight algorithm is the use of energy-over-weight (EOW) curves to determine range and crossrange boundaries. The major challenges of this technique are exo-atmospheric flight, and phugoid oscillations in energy. During exo-atmospheric flight, energy is constant, so vehicle EOW is not sufficient to determine glide capability. The paper describes how the exo-atmospheric problem is solved by propagating the vehicle state to an atmospheric pullout state defined by Shuttle guidance parameters." @default.
- W1640136739 created "2016-06-24" @default.
- W1640136739 creator A5010364500 @default.
- W1640136739 creator A5070220294 @default.
- W1640136739 creator A5071288429 @default.
- W1640136739 creator A5075262456 @default.
- W1640136739 date "2002-11-19" @default.
- W1640136739 modified "2023-09-26" @default.
- W1640136739 title "Onboard Determination of Vehicle Glide Capability for Shuttle Abort Flight Managment (SAFM)" @default.
- W1640136739 hasPublicationYear "2002" @default.
- W1640136739 type Work @default.
- W1640136739 sameAs 1640136739 @default.
- W1640136739 citedByCount "0" @default.
- W1640136739 crossrefType "journal-article" @default.
- W1640136739 hasAuthorship W1640136739A5010364500 @default.
- W1640136739 hasAuthorship W1640136739A5070220294 @default.
- W1640136739 hasAuthorship W1640136739A5071288429 @default.
- W1640136739 hasAuthorship W1640136739A5075262456 @default.
- W1640136739 hasConcept C106125477 @default.
- W1640136739 hasConcept C111919701 @default.
- W1640136739 hasConcept C127413603 @default.
- W1640136739 hasConcept C146978453 @default.
- W1640136739 hasConcept C178802073 @default.
- W1640136739 hasConcept C2777549182 @default.
- W1640136739 hasConcept C2778476105 @default.
- W1640136739 hasConcept C2780179797 @default.
- W1640136739 hasConcept C29829512 @default.
- W1640136739 hasConcept C30322324 @default.
- W1640136739 hasConcept C41008148 @default.
- W1640136739 hasConcept C44154836 @default.
- W1640136739 hasConceptScore W1640136739C106125477 @default.
- W1640136739 hasConceptScore W1640136739C111919701 @default.
- W1640136739 hasConceptScore W1640136739C127413603 @default.
- W1640136739 hasConceptScore W1640136739C146978453 @default.
- W1640136739 hasConceptScore W1640136739C178802073 @default.
- W1640136739 hasConceptScore W1640136739C2777549182 @default.
- W1640136739 hasConceptScore W1640136739C2778476105 @default.
- W1640136739 hasConceptScore W1640136739C2780179797 @default.
- W1640136739 hasConceptScore W1640136739C29829512 @default.
- W1640136739 hasConceptScore W1640136739C30322324 @default.
- W1640136739 hasConceptScore W1640136739C41008148 @default.
- W1640136739 hasConceptScore W1640136739C44154836 @default.
- W1640136739 hasLocation W16401367391 @default.
- W1640136739 hasOpenAccess W1640136739 @default.
- W1640136739 hasPrimaryLocation W16401367391 @default.
- W1640136739 hasRelatedWork W13483567 @default.
- W1640136739 hasRelatedWork W1484392197 @default.
- W1640136739 hasRelatedWork W1524635524 @default.
- W1640136739 hasRelatedWork W15328214 @default.
- W1640136739 hasRelatedWork W1814526903 @default.
- W1640136739 hasRelatedWork W2000437317 @default.
- W1640136739 hasRelatedWork W2048132500 @default.
- W1640136739 hasRelatedWork W2071239835 @default.
- W1640136739 hasRelatedWork W2087812943 @default.
- W1640136739 hasRelatedWork W2092278245 @default.
- W1640136739 hasRelatedWork W247662023 @default.
- W1640136739 hasRelatedWork W2608584985 @default.
- W1640136739 hasRelatedWork W2615376873 @default.
- W1640136739 hasRelatedWork W2730668861 @default.
- W1640136739 hasRelatedWork W3175659700 @default.
- W1640136739 hasRelatedWork W756857147 @default.
- W1640136739 hasRelatedWork W762597596 @default.
- W1640136739 hasRelatedWork W835580747 @default.
- W1640136739 hasRelatedWork W146774083 @default.
- W1640136739 hasRelatedWork W3138964608 @default.
- W1640136739 isParatext "false" @default.
- W1640136739 isRetracted "false" @default.
- W1640136739 magId "1640136739" @default.
- W1640136739 workType "article" @default.