Aeronautics and aerospace open access journal最新文献_第2页

Key factors driving the potential future developments in automated manufacturing at Hindustan aeronautics ltd (HAL) 推动印度斯坦航空有限公司（HAL）自动化制造未来潜在发展的关键因素

Aeronautics and aerospace open access journal Pub Date : 2024-02-27 DOI: 10.15406/aaoaj.2024.08.00190

Shankar Subramanian Iyer, Khyati Marwah, Rupinder Pal Kaur, Benita KJ Veronica

引用次数: 0

Incidence of cervical and lumbar spine injuries in Brazilian air force helicopter pilots 巴西空军直升机飞行员颈椎和腰椎损伤的发生率

Aeronautics and aerospace open access journal Pub Date : 2024-02-26 DOI: 10.15406/aaoaj.2024.08.00189

Thiago AR Bezerra, Ana Carolina RV Rodrigues, Thiago G Trigueiro, Liliana M Occulate, Hamilton RMO Carriço, Leonardo Mendes Faria

{"title":"Incidence of cervical and lumbar spine injuries in Brazilian air force helicopter pilots","authors":"Thiago AR Bezerra, Ana Carolina RV Rodrigues, Thiago G Trigueiro, Liliana M Occulate, Hamilton RMO Carriço, Leonardo Mendes Faria","doi":"10.15406/aaoaj.2024.08.00189","DOIUrl":"https://doi.org/10.15406/aaoaj.2024.08.00189","url":null,"abstract":"This paper is a brief analysis of the incidence of pain and discomfort caused by flying rotary-wing aircraft. This is due to the excessive vibration exerted by the rotors on the pilot's seat, which is absorbed by the pilot's spine, and the posture adopted by the pilot during the flight due to the layout of the controls. Air forces from various countries such as Israel, Sweden, England, among others, have considered low back pain to be a primary health problem in airmen and admit that this type of problem is detrimental to flight safety, given that the pain acts throughout the flight and can appear at a level that distracts the pilot. The aim of this study was to clarify the incidence of pain and discomfort among rotary-wing pilots in the Brazilian Air Force. To help carry out the study, an online questionnaire with multiple-choice, scale and full answer questions was used, answered by 124 aviation officers belonging to the Brazilian Air Force. Corroborating previous research in this area, we identified that the main discomforts are related to the position of piloting the aircraft, mainly located in the region of the spine. Most of this discomfort lasts from a few minutes to a few hours. The main preventative methods used by helicopter pilots are related to strength training. Thus, we can infer the awareness of pilots and authorities of the importance of physical exercise, thus inferring an important preventive measure.","PeriodicalId":474325,"journal":{"name":"Aeronautics and aerospace open access journal","volume":"17 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140430251","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

The ring-an optimized spaceship for the 21st century 戒指--21 世纪的优化飞船

Aeronautics and aerospace open access journal Pub Date : 2024-02-08 DOI: 10.15406/aaoaj.2024.08.00188

Giorgio Gaviraghi

引用次数: 0

Incidence of barotrauma in the formation of cadets aviators in the Brazilian air force 巴西空军飞行学员队列中气压创伤的发生率

Aeronautics and aerospace open access journal Pub Date : 2023-12-06 DOI: 10.15406/aaoaj.2023.07.00185

Thiago Augusto Rochetti Bezerra, João Paulo Pinelli Santos, Rafael Pinheiro do Nascimento, Liliana Martins Occulate, Délio Tiago Martins Malaquias, Isadora de Oliveira Soler

{"title":"Incidence of barotrauma in the formation of cadets aviators in the Brazilian air force","authors":"Thiago Augusto Rochetti Bezerra, João Paulo Pinelli Santos, Rafael Pinheiro do Nascimento, Liliana Martins Occulate, Délio Tiago Martins Malaquias, Isadora de Oliveira Soler","doi":"10.15406/aaoaj.2023.07.00185","DOIUrl":"https://doi.org/10.15406/aaoaj.2023.07.00185","url":null,"abstract":"Middle ear barotrauma is a pathology that can occur due to ineffective equalization between the external and internal pressures of the middle ear and can be caused by everyday conditions, which we sometimes do not notice before a flight. It is important to instruct the aviators to identify conditions that expose them to this pathology in order to make their instructions at the Air Force Academy (AFA This study aims to measure the level of consciousness of the cadets on the subject, the recurrence of conditions that lead to the emergence of barotraumas, and the preventive measures used. A questionnaire with seven questions about barotrauma knowledge was applied to a sample of 40 Cadet Aviators of the second Squadron in 2023. All these cadets were conducting the Air training course when they answered the questionnaire. All were questioned as to their knowledge of barotrauma, symptoms, procedures for relief and treatment. The results showed that although cadets have broad knowledge on the subject, and more than half of those questioned admit to performing instructional flights in non-ideal health conditions. This behavior, besides greatly increasing the risk of occurrence of a barotrauma, shows that a preventive culture is not being cultivated in the cadets. It is necessary to reaffirm the dangers of a barotrauma during the training of cadets who are going to begin flight instruction. Cadet awareness of pathologies involving air activity is important to everyone, as it is, a matter of flight safety.","PeriodicalId":474325,"journal":{"name":"Aeronautics and aerospace open access journal","volume":"24 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138984206","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

Weapons and technology: the economics of Augustine weapons systems 武器与技术:奥古斯丁武器系统的经济学

Aeronautics and aerospace open access journal Pub Date : 2023-11-02 DOI: 10.15406/aaoaj.2023.07.00183

Keith Hartley

引用次数: 0

The importance of hypoxia sensors in detecting HIF-1 biomarker at high altitude 缺氧传感器在高海拔地区HIF-1生物标志物检测中的重要性

Aeronautics and aerospace open access journal Pub Date : 2023-10-19 DOI: 10.15406/aaoaj.2023.07.00182

Shazreen Shaharuddin, Nik Mohd Afizan Nik Abd Rahman, Mas Jaffri Masarudin, Mohammedarfat N Alamassi

引用次数: 0

Determining factors for the competitive integration of Mexican companies in the CVG of the aerospace sector 决定墨西哥公司在航空航天部门CVG竞争性整合的因素

Aeronautics and aerospace open access journal Pub Date : 2023-10-03 DOI: 10.15406/aaoaj.2023.07.00181

Jhoana Méndez, Mónica Casalet Ravenna

引用次数: 0

Analysis of electrostatic filter to mitigate ash diffusion into engine 静电过滤器减少灰扩散到发动机的分析

Aeronautics and aerospace open access journal Pub Date : 2023-09-25 DOI: 10.15406/aaoaj.2023.07.00180

A Zare Shahneh

{"title":"Analysis of electrostatic filter to mitigate ash diffusion into engine","authors":"A Zare Shahneh","doi":"10.15406/aaoaj.2023.07.00180","DOIUrl":"https://doi.org/10.15406/aaoaj.2023.07.00180","url":null,"abstract":"Between March and June 2010 a series of volcanic events at Eyjafjallajökull in Iceland caused enormous disruption to air travel across Western Europe. The disruptions started over an initial period of six days in April 2010. About 20 countries closed their airspace to commercial jet traffic and it affected approximately 10 million travelers. Volcanic ash has been caused grounding of many aircraft as a source of possible damage to aircraft engines. The projected technical strategy, an electrostatic precipitator (ESP), was tailored for the high bypass turbofan engine model PW4000 in this study. It was based on the standard two-stage ESP but designed with the PW4000 engine. The innovative ESP prototype is primarily made up of a hexagram structure of six discharge electrode plates and three circular collecting electrode rings. An aerodynamic verification was conducted through computational fluid design (CFD). It built a 20-meter wind tunnel and placed the engine with ESP in the centre of it. A particle-laden atmosphere was created in the simulation using a discrete phase model (DPM) to replicate volcanic ash injection into clean air. From the results, it has a clear aerodynamic impact near the engine's intake, although the effect is small and may be ignored after the engine fans. Additionally, a CFD electrostatic verification was generated with a voltage of 20000 V, and the contour of the electric potential is perfect distributed, suggesting that an electric field can be adequately given by this ESP configuration design. Therefore, the simulation results of the new ESP layout would have allowed drawing conclusions about the electrostatic filter's ability to reduce volcanic ash intake in an engine with high aerodynamic performance.","PeriodicalId":474325,"journal":{"name":"Aeronautics and aerospace open access journal","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135924733","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

Hypervelocity launchers for satellite structures orbital debris characterization 卫星结构轨道碎片特性超高速发射装置

Aeronautics and aerospace open access journal Pub Date : 2023-01-17 DOI: 10.15406/aaoaj.2023.07.00163

Abbasali Saboktakin, Christos Spitas

引用次数: 0