Matches in SemOpenAlex for { <https://semopenalex.org/work/W1569886647> ?p ?o ?g. }
Showing items 1 to 86 of
86
with 100 items per page.
- W1569886647 abstract "An electromagnetic launcher is being studied for ejection of 350-g projectiles at velocities of up to 140 m/s. The electromagnetic approach is desirable because of the variable ejection velocity, high payload fraction, and lack of pyrotechnics. The low velocity of the projectile allows the use of low-voltage, solid-state switching in the pulsed power, but makes obtaining high-efficiency more difficult. The launcher is a 4.5-cm square bore, 80-cm long fully augmented system, with copper inner rails and aluminum augmenting rails. The launcher is driven by 2, 5000 /spl mu/F, 5 kV capacitor banks, with a thyristor switch and diode crowbar for each bank. The banks are connected to the launcher with copper buswork. The diagnostics include the current in each bank; B-dot probes for the position of the projectile, a laser time-of-flight velocity measurement at the muzzle and the armature voltage, measured from the muzzle. The armature voltage measurement requires substantial corrections to remove the induced voltages from the augmenting and armature fields. The projectile is a Delrin body with A1100 wires as the armature. Six to ten, 0.32-cm diameter wires are used. The wires run through the projectile in separate holes, and then are bent into a staple shape in grooves along the sides of the projectile. The wires are then sanded to obtain a flat surface for contact to the rails. The JxB forces that propel the projectile forward also force the wire sides into the rails to maintain good electrical contact. The design goals of 350-g and 140 m/s are achieved, but at an overall electrical efficiency of only 7%. The electrical parameters of the various circuit elements are measured, and the early-time skin resistances of several elements lead to the low efficiency. Reconfiguring these elements to have lower early time resistance is predicted to improve the efficiency to the 15% range. Results of circuit measurements and models will be presented." @default.
- W1569886647 created "2016-06-24" @default.
- W1569886647 creator A5047894584 @default.
- W1569886647 creator A5052009971 @default.
- W1569886647 date "2004-07-20" @default.
- W1569886647 modified "2023-09-24" @default.
- W1569886647 title "Initial operation, modeling and optimization of a low-velocity augmented railgun" @default.
- W1569886647 cites W2032739949 @default.
- W1569886647 cites W2043734469 @default.
- W1569886647 cites W2050070420 @default.
- W1569886647 cites W2119061914 @default.
- W1569886647 cites W2121013117 @default.
- W1569886647 doi "https://doi.org/10.1109/ppc.2003.1278004" @default.
- W1569886647 hasPublicationYear "2004" @default.
- W1569886647 type Work @default.
- W1569886647 sameAs 1569886647 @default.
- W1569886647 citedByCount "12" @default.
- W1569886647 countsByYear W15698866472012 @default.
- W1569886647 crossrefType "proceedings-article" @default.
- W1569886647 hasAuthorship W1569886647A5047894584 @default.
- W1569886647 hasAuthorship W1569886647A5052009971 @default.
- W1569886647 hasConcept C119599485 @default.
- W1569886647 hasConcept C121332964 @default.
- W1569886647 hasConcept C127413603 @default.
- W1569886647 hasConcept C150344060 @default.
- W1569886647 hasConcept C159985019 @default.
- W1569886647 hasConcept C165801399 @default.
- W1569886647 hasConcept C172227984 @default.
- W1569886647 hasConcept C192562407 @default.
- W1569886647 hasConcept C24890656 @default.
- W1569886647 hasConcept C2780655974 @default.
- W1569886647 hasConcept C2780673119 @default.
- W1569886647 hasConcept C30403606 @default.
- W1569886647 hasConcept C49304495 @default.
- W1569886647 hasConcept C52192207 @default.
- W1569886647 hasConcept C57879066 @default.
- W1569886647 hasConcept C62520636 @default.
- W1569886647 hasConcept C74907780 @default.
- W1569886647 hasConcept C93671265 @default.
- W1569886647 hasConcept C97039730 @default.
- W1569886647 hasConceptScore W1569886647C119599485 @default.
- W1569886647 hasConceptScore W1569886647C121332964 @default.
- W1569886647 hasConceptScore W1569886647C127413603 @default.
- W1569886647 hasConceptScore W1569886647C150344060 @default.
- W1569886647 hasConceptScore W1569886647C159985019 @default.
- W1569886647 hasConceptScore W1569886647C165801399 @default.
- W1569886647 hasConceptScore W1569886647C172227984 @default.
- W1569886647 hasConceptScore W1569886647C192562407 @default.
- W1569886647 hasConceptScore W1569886647C24890656 @default.
- W1569886647 hasConceptScore W1569886647C2780655974 @default.
- W1569886647 hasConceptScore W1569886647C2780673119 @default.
- W1569886647 hasConceptScore W1569886647C30403606 @default.
- W1569886647 hasConceptScore W1569886647C49304495 @default.
- W1569886647 hasConceptScore W1569886647C52192207 @default.
- W1569886647 hasConceptScore W1569886647C57879066 @default.
- W1569886647 hasConceptScore W1569886647C62520636 @default.
- W1569886647 hasConceptScore W1569886647C74907780 @default.
- W1569886647 hasConceptScore W1569886647C93671265 @default.
- W1569886647 hasConceptScore W1569886647C97039730 @default.
- W1569886647 hasLocation W15698866471 @default.
- W1569886647 hasOpenAccess W1569886647 @default.
- W1569886647 hasPrimaryLocation W15698866471 @default.
- W1569886647 hasRelatedWork W1525105790 @default.
- W1569886647 hasRelatedWork W2027298520 @default.
- W1569886647 hasRelatedWork W2033411037 @default.
- W1569886647 hasRelatedWork W2053944822 @default.
- W1569886647 hasRelatedWork W2091126176 @default.
- W1569886647 hasRelatedWork W2104337302 @default.
- W1569886647 hasRelatedWork W2125421919 @default.
- W1569886647 hasRelatedWork W2136976242 @default.
- W1569886647 hasRelatedWork W2162840551 @default.
- W1569886647 hasRelatedWork W2335467733 @default.
- W1569886647 hasRelatedWork W2770947598 @default.
- W1569886647 hasRelatedWork W2896151686 @default.
- W1569886647 hasRelatedWork W2913587815 @default.
- W1569886647 hasRelatedWork W2947430723 @default.
- W1569886647 hasRelatedWork W2981057091 @default.
- W1569886647 hasRelatedWork W3011450562 @default.
- W1569886647 hasRelatedWork W3099250048 @default.
- W1569886647 hasRelatedWork W3144963176 @default.
- W1569886647 hasRelatedWork W50672332 @default.
- W1569886647 hasRelatedWork W2287339149 @default.
- W1569886647 isParatext "false" @default.
- W1569886647 isRetracted "false" @default.
- W1569886647 magId "1569886647" @default.
- W1569886647 workType "article" @default.