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The Ultra-High-Energy Cosmic Ray Fluorescent Detector of the EUSO-SPB2 Project
2024
The authors describe a EUSO-SPB2 balloon experiment to study ultra-high energy and extreme energy cosmic rays along with high-energy astrophysical neutrinos. The main characteristics of the fluorescent and Cherenkov telescopes are given. A multi-channel photodetectoris calibrated as part of the pre-flight preparation.
Journal Article
A General Method for Pre-Flight Preparation in Data Collection for Unmanned Aerial Vehicle-Based Bridge Inspection
by
Jauregui, David
,
Zhang, Qianyun
,
Boyle, Jonathan
in
Accuracy
,
Algorithms
,
Artificial intelligence
2024
Unmanned Aerial Vehicles (UAVs) have garnered significant attention in recent years due to their unique features. Utilizing UAVs for bridge inspection offers a promising solution to overcome challenges associated with traditional methods. While UAVs present considerable advantages, there are challenges associated with their use in bridge inspection, particularly in ensuring effective data collection. The primary objective of this study is to tackle the challenges related to data collection in bridge inspection using UAVs. A comprehensive method for pre-flight preparation in data collection is proposed. A well-structured flowchart has been created, covering crucial steps, including identifying the inspection purpose, selecting appropriate hardware, planning and optimizing flight paths, and calibrating sensors. The method has been tested in two case studies of bridge inspections in the State of New Mexico. The results show that the proposed method represents a significant advancement in utilizing UAVs for bridge inspection. These results indicate improvements in accuracy from 7.19% to 21.57% in crack detection using the proposed data collection method. By tackling the data collection challenges, the proposed method serves as a foundation for the application of UAVs for bridge inspection.
Journal Article
Load-Bearing Capacity of Elements of Composite Shell Structures in Rocket and Space Engineering Made of Composite Materials
by
Buiskikh, K. P.
,
Potapov, O. M.
,
Kravchuk, L. V.
in
Aerospace engineering
,
Analysis
,
Anisotropy
2022
The importance and necessity of investigating the influence of a wide range of factors on behavior of composite materials and their real possibilities for operation conditions of rocket-space engineering structure elements are justified. Specifics of material structure and composition, technological processes of their production and design of complex elements, severe conditions of pre-operational tests, direct pre-flight preparation, and effect of complex thermal force factors in the course of controlled flights mean the necessity of experimental studies of the effects of such factors on current and residual physical-mechanical characteristics. For such tasks, the program development results, equipment, and methods of experimental studies of the effect of factors with different character on the integrity of real structures made of polymer composites for different loading modes and types of the stress state are presented. The object of the study is a shell model of a solid fuel rocket engine body made of polymer composite material. Analysis of test results of model shells made of IMS-65 E23 24K+Huntsman unidirectional carbon plastic made by annular winding (90°) under combined loading made it possible to determine the influence of design and technological factors on mechanical properties of these shells and their limit state. New data have been obtained concerning the behavior of such material under the complex action of force loading (compression–tension) and internal pressure (up to 10 MPa), taking anisotropy into account.
Journal Article
NASA Activity Update for the 2013 Unmanned Vehicle Systems International (UVSI) Yearbook
2013
This year s report offers a high level perspective on some of the UAS related activities in which NASA is involved, both internal and external to the agency. Internally, NASA issued UAS operational policy on certification of NASA UAS and aircrew. A team of NASA UAS experts and operators analyzed all current procedures and best practices to design the policy. An update to the agencies Aircraft Operations Management Manual incorporated a new chapter to address UAS planning, preflight operations, flight operations, flight crew requirements, airworthiness and flight safety reviews. NASA UAS are classified into three categories based on weight and airspeed. Aircrews, including observers, are classified by how they interface with the UAS, and the policy defines qualifications, training, and currency. The NASA flight readiness approval process identifies risks and mitigations in order to reduce the likelihood and/or consequence of the risk to an acceptable level. The UAS operations process incorporates all aspects of airworthiness, flight standards and range safety exactly the same processes used for NASA manned aircraft operations. NASA has two internal organizations that routinely operate UAS. The Science Mission Directorate utilizes UAS as part of its Airborne Science Program and is the most frequent operator of NASA UAS in both national and international airspace. The Aeronautics Research Mission Directorate conducts UAS flight operations in addition to conducting research important to the UAS community. This past year the Science Mission Directorate supported the Hurricane and Severe Storm Sentimental (HS3) Mission with two NASA Global Hawk platforms. HS3 is a five-year mission specifically targeted to investigate the processes that underlie hurricane formation. During the 2012 portion of this mission the Global Hawk overflew hurricanes Leslie and Nadine in the Atlantic Ocean completing 6 flights and accumulating more than 148 flight hours. Another multi-year mission was initiated last year when the Sensor Integrated Environmental Remote Research Aircraft (SIERRA) UAS began surveying faults in California s Surprise Valley. A team of scientists and engineers from the United States Geological Survey (USGS), NASA Ames Research Center, Central Washington University, and Carnegie Mellon University will measure magnetic fields using ground surveys and the SIERRA to map the geophysics below the surface of Surprise Valley. The data collected will be used to generate 3D maps of the geophysical data of the area. The Aeronautics Mission Directorate continues its collaboration with Boeing to conduct UAS flight operations of the X-48C, a modified version of the X-48B originally built by Cranfield Aerospace, United Kingdom. The Aeronautics Mission Directorate utilizes vehicles of this size for a wide variety of research studies. Most of these operations are conducted within restricted airspace. The Aeronautics Research Mission Directorate also sponsors the UAS in the National Airspace System (NAS) Project, which is working in close cooperation with the Federal Aviation Administration (FAA) to address critical challenges associated with routine UAS operations in civil airspace. The project is focused on separation assurance and collision avoidance systems and algorithms, command and control for non-military operations including spectrum allocation requirements, human system interaction issues, and safety and certification topics.
Book Chapter