Aerotecnica Missili & Spazio最新文献_第4页

FLEW: A DNS Solver for Compressible Flows in Generalized Curvilinear Coordinates FLEW：广义曲线坐标下可压缩流动的 DNS 求解器

Aerotecnica Missili & Spazio Pub Date : 2024-03-04 DOI: 10.1007/s42496-024-00199-4

Giulio Soldati, Alessandro Ceci, Sergio Pirozzoli

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引用次数: 0

Implementation and Validation of a Numerical Method for Concentrated Suspensions in Large Flows Based on the Particle Diffusion Equation 基于粒子扩散方程的大流量集中悬浮物数值方法的实施与验证

Aerotecnica Missili & Spazio Pub Date : 2024-02-28 DOI: 10.1007/s42496-024-00197-6

Raoul Andriulli, Luca Fadigati, Mattia Magnani, Nabil Souhair, Fabrizio Ponti

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引用次数: 0

Innovative Multi-Unmanned Vehicle System for Enhancing Diver Safety: BEA 增强潜水员安全的创新型多无人驾驶飞行器系统：东亚银行

Aerotecnica Missili & Spazio Pub Date : 2024-02-21 DOI: 10.1007/s42496-024-00198-5

Leonardo Barilaro, Jason Gauci, Marlon Galea, Andrea Filippozzi, David Vella, Robert Camilleri

{"title":"Innovative Multi-Unmanned Vehicle System for Enhancing Diver Safety: BEA","authors":"Leonardo Barilaro, Jason Gauci, Marlon Galea, Andrea Filippozzi, David Vella, Robert Camilleri","doi":"10.1007/s42496-024-00198-5","DOIUrl":"10.1007/s42496-024-00198-5","url":null,"abstract":"<div><p>This paper presents BEA (Buoy Eau Air), an innovative multi-unmanned vehicle system to address the issue of marine traffic endangering scuba diving and free diving. Scuba diving is a popular recreational activity with over 6 million active participants worldwide. Boat drivers may fail to recognize universal markers due to a variety of factors, such as inattention, unfamiliarity with dive zones, or poor visibility. In addition, some boat drivers may deliberately speed too close to dive zones, unaware of the dangers they pose to divers. This risk is particularly pronounced in popular dive destinations like Malta, where boat traffic can be heavy. Divers in these areas are often more vulnerable to collisions. To mitigate these risks, the proposed system consists of an Unmanned Aerial Vehicle (UAV), an Unmanned Surface Vehicle (USV), and an Unmanned Underwater Vehicle (UUV), which work in synergy to monitor and protect divers. The UAV monitors the surface of the sea near the dive zone for any traffic, while the USV tracks the UUV, communicates with the other unmanned vehicles, and provides a takeoff/landing surface for the UAV. The USV can also be used to tow divers and equipment to and from the shore. Finally, the UUV tracks the diver and warns them if it is unsafe to surface. The paper provides an overview of the system’s design and architecture, as well as algorithms for boat detection, precision landing, and UUV tracking. Preliminary tests on a prototype have shown that the system is suitable for the intended application. The BEA system is the first in the world to use a multi-drone system to create a geo-fence around the diver and monitor the area within it. This has the potential to significantly improve diver safety with real-time alerts, providing also assistance with navigation, towing of divers and emergency response.</p></div>","PeriodicalId":100054,"journal":{"name":"Aerotecnica Missili & Spazio","volume":"103 4","pages":"339 - 349"},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140445405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AIDAA News #21 AIDAA 新闻 #21

Aerotecnica Missili & Spazio Pub Date : 2024-02-03 DOI: 10.1007/s42496-024-00196-7

Michele Guida

引用次数: 0

AIDAA News #21 AIDAA 新闻 #21

Aerotecnica Missili & Spazio Pub Date : 2024-02-03 DOI: 10.1007/s42496-024-00196-7

Michele Guida

引用次数: 0

Near-Optimal Feedback Guidance for Low-Thrust Earth Orbit Transfers 低推力地球轨道转移的近优反馈制导

Aerotecnica Missili & Spazio Pub Date : 2024-02-01 DOI: 10.1007/s42496-023-00193-2

D. Atmaca, M. Pontani

{"title":"Near-Optimal Feedback Guidance for Low-Thrust Earth Orbit Transfers","authors":"D. Atmaca, M. Pontani","doi":"10.1007/s42496-023-00193-2","DOIUrl":"10.1007/s42496-023-00193-2","url":null,"abstract":"<div><p>This research describes a near-optimal feedback guidance, based on nonlinear orbit control, for low-thrust Earth orbit transfers. Lyapunov stability theory leads to proving that although several equilibria exist, only the desired operational conditions are associated with a stable equilibrium. This ensures quasi-global asymptotic convergence toward the desired final orbit. The dynamical model includes the effect of eclipsing on the available thrust, as well as all the relevant orbit perturbations, such as several harmonics of the geopotential, solar radiation pressure, aerodynamic drag, and gravitational attraction due to the Sun and the Moon. Near-optimality of the feedback guidance comes from careful selection of the control gains. They are identified in two steps. Step (a) is an extensive table search in which the gains are changed in a large interval. Step (b) uses a numerical optimization algorithm that refines the gains found in (a), while minimizing the time of flight. For the numerical simulations, two scenarios are defined: (i) nominal conditions and (ii) nonnominal conditions, which arise from orbit injection errors and stochastic failures of the propulsion system. For case (i), gain optimization leads to obtaining numerical results very close to those corresponding to a known optimal orbit transfer with eclipse arcs. Moreover, for case (ii), extensive Monte Carlo simulations demonstrate that the nonlinear feedback guidance at hand is effective in driving a spacecraft from a low Earth orbit to a geostationary orbit, also in the presence of nonnominal flight conditions.</p></div>","PeriodicalId":100054,"journal":{"name":"Aerotecnica Missili & Spazio","volume":"103 3","pages":"245 - 253"},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42496-023-00193-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139814354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EFESTO-2: European Flexible Heat Shields Advanced TPS Design and Tests for Future In-Orbit Demonstration-2 EFESTO-2：欧洲柔性热屏蔽先进 TPS 设计和未来在轨演示-2 测试

Aerotecnica Missili & Spazio Pub Date : 2024-01-19 DOI: 10.1007/s42496-023-00191-4

Giuseppe Guidotti, Alessandro Princi, Jaime Gutierrez-Briceno, Federico Trovarelli, Giuseppe Governale, Nicole Viola, Ingrid Dietlein, Steffen Callsen, Kevin Bergmann, Junnai Zhai, Thomas Gawehn, Roberto Gardi, Barbara Tiseo, Ysolde Prevereaud, Yann Dauvois, Giovanni Gambacciani, Giada Dammacco

{"title":"EFESTO-2: European Flexible Heat Shields Advanced TPS Design and Tests for Future In-Orbit Demonstration-2","authors":"Giuseppe Guidotti, Alessandro Princi, Jaime Gutierrez-Briceno, Federico Trovarelli, Giuseppe Governale, Nicole Viola, Ingrid Dietlein, Steffen Callsen, Kevin Bergmann, Junnai Zhai, Thomas Gawehn, Roberto Gardi, Barbara Tiseo, Ysolde Prevereaud, Yann Dauvois, Giovanni Gambacciani, Giada Dammacco","doi":"10.1007/s42496-023-00191-4","DOIUrl":"10.1007/s42496-023-00191-4","url":null,"abstract":"<div><p>EFESTO-2 is an EU-funded project under Horizon Europe that aims to enhance European expertise in Inflatable Heat Shields (IHS). Building on the achievements of the previous EFESTO project (H2020 funds No 821801), EFESTO-2 focuses on advancing key IHS technologies to increase their Technology Readiness Level (TRL). The project pillars include analysing the business case for IHS applications, exploring additional aspects of IHS, improving tools and models and establishing a development roadmap for IHS systems. This paper outlines the project objectives and plan, highlighting ongoing and future activities for the next 2 years, positioning it within the European re-entry technology roadmap. This project has received funding from the European Union's Horizon Europe program (grant agreement No 1010811041).</p></div>","PeriodicalId":100054,"journal":{"name":"Aerotecnica Missili & Spazio","volume":"103 2","pages":"149 - 164"},"PeriodicalIF":0.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42496-023-00191-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139525702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Publisher Correction: Hygrothermal Effects in Aeronautical Composite Materials Subjected to Freeze–Thaw Cycling 出版商更正：受冻融循环影响的航空复合材料中的湿热效应

Aerotecnica Missili & Spazio Pub Date : 2023-12-29 DOI: 10.1007/s42496-023-00194-1

Pietro Aceti, Christian Bianchi, Giuseppe Sala

引用次数: 0

Experimental Validation of Virtual Wind Tunnel Testing for Ultra-low Reynolds Numbers Flows 超低雷诺数流体虚拟风洞试验的实验验证

Aerotecnica Missili & Spazio Pub Date : 2023-12-19 DOI: 10.1007/s42496-023-00189-y

Manuel Carreño Ruiz, Domenic D’Ambrosio

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Modeling, Simulation, and Control of a Formation of Multirotor Aircraft for Transportation of Suspended Loads 多旋翼飞行器编队运输悬挂物的建模、仿真与控制

Aerotecnica Missili & Spazio Pub Date : 2023-12-15 DOI: 10.1007/s42496-023-00192-3

Elia Costantini

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