Design, Fabrication, and Testing of the Minotaur IV Large Fairing
Notice bibliographique
Résumé
This paper describes the development and testing of a new fairing for the Minotaur IV launch vehicle that increases the nominal diameter by 20 percent to 110 inches. The Air Force Research Laboratory's Space Vehicles Directorate managed the development of this fairing for the purposes of demonstrating two out-of-autoclave large composite structure manufacturing processes. The larger portion of the fairing was fabricated using Alliant Techsystems' developed procedures for high quality composites using pre-preg cloth, extensive vacuum bagging, and oven curing. The smaller, but highly loaded, boattail portion of the fairing uses a WebCore sandwich core with a carbon fiber wrapped foam core. This portion of the fairing was produced using a Vacuum Assisted Resin Transfer Molding process followed by an oven cure. The fairing assembly is composed of four main sections with bolted composite-to-composite connections. The large fairing qualification test is the first of its kind conducted at AFRL since recent facility upgrades. The primary objective is to validate that the fairing can survive 125 percent of the predicted flight-induced loads. During the experiment force is concurrently applied at four discrete locations to create critical flight-like stresses and strains in the proper test article region without over testing non-critical areas. During the test synchronized force, strain, and displacement data will be acquired for comparison to pretest predictions. I. Introduction his paper describes the development and testing of a new fairing for the Minotaur IV launch vehicle. This is a relatively new launch vehicle assembled from Minuteman solid rockets and extra stages to allow delivery of moderately large spacecraft to orbital missions. The baseline fairing for this launch vehicle is 92 inches in diameter; the new fairing, planned by Space and Missile Systems Center and their contractor Orbital Sciences Corporation (OSC), is 110 inches, using a boattail configuration with a modest 1.2 aspect ratio, shown in Figure 1. The length of the fairing is approximately 21 feet. Air Force Research Laboratory's (AFRL) Space Vehicles Directorate, Kirtland AFB, NM has agreed to develop this fairing for the purposes of demonstrating, and potentially obtaining, flight heritage for two out-of-autoclave composite manufacturing processes. The larger portion of the fairing was fabricated using Alliant Techsystems (ATK) developed procedures for high quality composites using pre-preg cloth, extensive vacuum bagging, and oven curing. The much smaller, but highly loaded boattail portion of the fairing, uses a WebCore sandwich core with a carbon fiber wrapped foam core. This portion of the fairing was produced using a Vacuum Assisted Resin Transfer Molding (VARTM) process and oven curing. 1 The fairing was assembled from four sections with bolted composite to composite connections. The fairing will be qualification tested in the AFRL's laboratory at Kirtland AFB. The second half of this paper details the design and execution of a unique aerospace structural test.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,002 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,001 | 0,001 |
| Communication savante | 0,001 | 0,001 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,003 | 0,001 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».