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Review of the Air Force Academy最新文献

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NUMERICAL MODELING OF AN ENERGY MANAGEMENT SYSTEM FOR A UAV DESIGN POWERED BY PHOTOVOLTAIC CELLS 光伏电池驱动无人机能量管理系统的数值模拟
Review of the Air Force Academy Pub Date : 2023-02-03 DOI: 10.19062/1842-9238.2022.20.2.6
A. Buzdugan, N. Jula, Albert Bălteanu
{"title":"NUMERICAL MODELING OF AN ENERGY MANAGEMENT SYSTEM FOR A UAV DESIGN POWERED BY PHOTOVOLTAIC CELLS","authors":"A. Buzdugan, N. Jula, Albert Bălteanu","doi":"10.19062/1842-9238.2022.20.2.6","DOIUrl":"https://doi.org/10.19062/1842-9238.2022.20.2.6","url":null,"abstract":"UAVs are increasingly used for tasks such as surveillance, monitoring, and inspection, but their effectiveness is limited by their energy storage and generation capacity. Therefore, optimizing the energy system of a solar-powered UAV is crucial to extend its range and duration, and numerical modeling can help achieve this goal. In this particular study, researchers focused on a solar-powered UAV with a 151 cm wingspan. They used three different energy sources to power the UAV, and then simulated its performance using numerical modeling. The aim was to find the optimal energy source for each stage of flight and ensure a steady and efficient power supply throughout the entire mission. The findings of this study have important implications for the development of new UAVs with exceptional performance","PeriodicalId":158636,"journal":{"name":"Review of the Air Force Academy","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115616582","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
ELECTROMAGNETIC FIELD DISTRIBUTION IN THE FAR-FIELD OF A PYRAMIDAL HORN ANTENNA 锥形喇叭天线远场电磁场分布
Review of the Air Force Academy Pub Date : 2023-02-03 DOI: 10.19062/1842-9238.2022.20.2.5
R. Popa, G. Iubu
{"title":"ELECTROMAGNETIC FIELD DISTRIBUTION IN THE FAR-FIELD OF A PYRAMIDAL HORN ANTENNA","authors":"R. Popa, G. Iubu","doi":"10.19062/1842-9238.2022.20.2.5","DOIUrl":"https://doi.org/10.19062/1842-9238.2022.20.2.5","url":null,"abstract":"The analysis of electromagnetic compatibility problems in radio electronic systems also involves the study of the distribution of the electromagnetic field generated by the antenna system of the device in the far-field area. Having a solid critical overview of the current research on the topic as a starting point, this article presents, in a synthetic, coherent and accessible manner, the procedure for the mathematical modelling of the electromagnetic field radiated in the far-field zone by a pyramidal horn antenna. The second part of the article presents the numerical and graphical results obtained by modelling the procedure described above by means of computer-assisted modelling.","PeriodicalId":158636,"journal":{"name":"Review of the Air Force Academy","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126933282","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
REMOTE SENSING IN BIOMETEOROLOGY 生物气象学中的遥感
Review of the Air Force Academy Pub Date : 2023-02-03 DOI: 10.19062/1842-9238.2022.20.2.1
A. Tudor
{"title":"REMOTE SENSING IN BIOMETEOROLOGY","authors":"A. Tudor","doi":"10.19062/1842-9238.2022.20.2.1","DOIUrl":"https://doi.org/10.19062/1842-9238.2022.20.2.1","url":null,"abstract":"Remote sensing is a powerful tool used in biometeorology to study the interactions between the atmosphere and living organisms, particularly plants. Through satellite-based sensors, researchers can observe and analyze a range of biophysical parameters related to vegetation, such as leaf area index, biomass, vegetation cover, and land surface temperature. This data can be used to estimate plant growth, productivity, and water use efficiency, as well as monitor environmental conditions, such as drought, heat stress, and air pollution. Remote sensing is used in the development of crop models for agricultural management and to study the impact of climate change on plant communities and ecosystems. By tracking changes in vegetation cover and productivity, as well as changes in phenology, remote sensing helps researchers identify optimal planting times, irrigation schedules, and predict crop yields.","PeriodicalId":158636,"journal":{"name":"Review of the Air Force Academy","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127582851","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
ISSUES ON QUADCOPTER DESIGN CUSTOMIZED FOR URBAN AERIAL SURVEILLANCE 城市空中侦察专用四轴飞行器设计问题
Review of the Air Force Academy Pub Date : 2023-02-03 DOI: 10.19062/1842-9238.2022.20.2.2
I. Andrei, G. Stoica, N. Crișan, D. Prisecaru, Cristian Stoica, Anca Greculescu, Javier Linares, Timothee Pol Ducrost, Alexis Billerey, Bastien FONTANA-CASTETS, Radu Mihalache
{"title":"ISSUES ON QUADCOPTER DESIGN CUSTOMIZED FOR URBAN AERIAL SURVEILLANCE","authors":"I. Andrei, G. Stoica, N. Crișan, D. Prisecaru, Cristian Stoica, Anca Greculescu, Javier Linares, Timothee Pol Ducrost, Alexis Billerey, Bastien FONTANA-CASTETS, Radu Mihalache","doi":"10.19062/1842-9238.2022.20.2.2","DOIUrl":"https://doi.org/10.19062/1842-9238.2022.20.2.2","url":null,"abstract":"The topic of this paper is in line with the efforts to reduce the spread of the pandemic effects; the objective is to design a quadcopter meant to perform urban aerial surveillance, focused on monitoring the urban traffic of cars and monitoring the traffic of groups of people, who should not gather in groups larger than three persons. The specificity of the work is given by the requirements of the European Project Semester EPS, where international teams of students actively experience a multidisciplinary and multicultural project for one semester in another university. This opportunity has allowed them to develop research and industrial partnerships. To this purpose, the approach provided by the I.N.C.A.S. as Research Partner is oriented towards Problem Based Learning and Project Organized Learning. The University as Organizer provides Project Related Courses and complementary Project Organized Learning. The research was oriented towards the customized design of a drone able to efficiently achieve the objective. The benefits of the research project are related mainly to the potential applications of the drone, with a good effect to cost ratio and to allowing the students to subsequently acquire valuable professional knowledge and experience from this research project","PeriodicalId":158636,"journal":{"name":"Review of the Air Force Academy","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116480132","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: 1
PERFORMANCE ANALYSIS OF MILITARY FLYING WING UAV WITH PULSE JET ENGINE 脉冲喷气发动机军用飞翼无人机性能分析
Review of the Air Force Academy Pub Date : 2023-02-03 DOI: 10.19062/1842-9238.2022.20.2.4
V. Prisacariu
{"title":"PERFORMANCE ANALYSIS OF MILITARY FLYING WING UAV WITH PULSE JET ENGINE","authors":"V. Prisacariu","doi":"10.19062/1842-9238.2022.20.2.4","DOIUrl":"https://doi.org/10.19062/1842-9238.2022.20.2.4","url":null,"abstract":"The current technological level of data acquisition systems, used on military and civilian unmanned aircraft, allow for diverse kinetic sampling conditions covering large ranges of altitudes and temperature. Thus, there is a need to collect the necessary atmospheric data, in terms of constructive simplicity and reduction of total costs (manufacturing and operation), with the help of unmanned aircraft equipped with PJE (pulse jet engine) and PDE (pulse detonation engine) propulsion systems. The article presents pre-design aspects of a flying wing UAV concept equipped with a PJE engine, which can be mounted on supersonic aircraft.","PeriodicalId":158636,"journal":{"name":"Review of the Air Force Academy","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121092595","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
LIGHT PAYLOAD QUADCOPTER DESIGN FOR THE TRANSPORTATION OF ESSENTIAL GOODS TO PEOPLE IN SELF-ISOLATION 用于向自我隔离人群运输必需品的轻型有效载荷四轴飞行器设计
Review of the Air Force Academy Pub Date : 2023-02-03 DOI: 10.19062/1842-9238.2022.20.2.3
I. Andrei, G. Stoica, N. Crișan, D. Prisecaru, Cristian Stoica, Anca Greculescu, Dries Bierens, Adrien Thibault, Vincent BURRE-ESPAGNOU, Martin Dillinger, George Zdru
{"title":"LIGHT PAYLOAD QUADCOPTER DESIGN FOR THE TRANSPORTATION OF ESSENTIAL GOODS TO PEOPLE IN SELF-ISOLATION","authors":"I. Andrei, G. Stoica, N. Crișan, D. Prisecaru, Cristian Stoica, Anca Greculescu, Dries Bierens, Adrien Thibault, Vincent BURRE-ESPAGNOU, Martin Dillinger, George Zdru","doi":"10.19062/1842-9238.2022.20.2.3","DOIUrl":"https://doi.org/10.19062/1842-9238.2022.20.2.3","url":null,"abstract":"A quadcopter, also called a quadrotor helicopter or quadrotor is a multirotor helicopter that is lifted and propelled by four rotors. In case of lockdown or self-isolation, companies as well as governments can make use of unmanned aerial vehicles equipped with obstacle detection and collision avoidance technology. It is paramount to understand the importance of flight safety with unmanned aerial vehicles. If rules and restrictions are not followed because the user with the controller made an error or was unconscious, a sophisticated system will detect possible conflict and save the drone before collision. In this paper, a digital model was created using MatLab software, in order to analyze and understand how a quadcopter works in its environment. Using the trajectory tools, a well-defined trajectory is defined for a quadcopter in order to better represent its behavior during a light parcel transport assignment. The results obtained can be used to design a drone for the delivery of small packages containing essential goods for people in self-isolation.","PeriodicalId":158636,"journal":{"name":"Review of the Air Force Academy","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126466450","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: 1
SOLVING THE BILEVEL LINEAR PROGRAMMING PROBLEM USING THE MONTE CARLO METHOD 用蒙特卡罗方法求解双层线性规划问题
Review of the Air Force Academy Pub Date : 2023-02-03 DOI: 10.19062/1842-9238.2022.20.2.8
Ş. Constantinescu, Ion Mierluș-Mazilu
{"title":"SOLVING THE BILEVEL LINEAR PROGRAMMING PROBLEM USING THE MONTE CARLO METHOD","authors":"Ş. Constantinescu, Ion Mierluș-Mazilu","doi":"10.19062/1842-9238.2022.20.2.8","DOIUrl":"https://doi.org/10.19062/1842-9238.2022.20.2.8","url":null,"abstract":"In this paper we propose to use the \"Monte Carlo\" method for solving bilevel linear programming (the bilevel linear programming problem – BLP problem). In the BLP problem, each decision maker tries to optimize their own objective function without considering the objective of the other party, but the decision of each party affects the objective value of the other party as the decision space. The existing methods for solving the BLP problem can be grouped into four categories: a) methods based on vertices enumeration; b) methods based on Kuhn-Tuck conditions; c) the fuzzy approach; d) metaheuristics methods. Starting from Gnedenko's theorem, this paper uses the \"Monte Carlo\" method to determine an approximate solution for the BLP problem. The numerical example presents the performance of the proposed approach.","PeriodicalId":158636,"journal":{"name":"Review of the Air Force Academy","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127094289","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
POWER SOURCES SWITCHING IN A HYBRID ENERGY NETWORK ON BOARD A SOLAR UAV 太阳能无人机上混合能源网络的电源切换
Review of the Air Force Academy Pub Date : 2023-02-03 DOI: 10.19062/1842-9238.2022.20.2.7
A. Buzdugan, N. Jula, Albert Bălteanu
{"title":"POWER SOURCES SWITCHING IN A HYBRID ENERGY NETWORK ON BOARD A SOLAR UAV","authors":"A. Buzdugan, N. Jula, Albert Bălteanu","doi":"10.19062/1842-9238.2022.20.2.7","DOIUrl":"https://doi.org/10.19062/1842-9238.2022.20.2.7","url":null,"abstract":"Utilizing a photovoltaic system to power an Unmanned Aerial Vehicle (UAV) enables longer and extended flights. A hybrid energy system, consisting of three distinct energy sources, was investigated. A technical solution was developed to optimize the energy system and mitigate transient effects observed during power source switching. Through a long-term aerial monitoring mission simulation, the study demonstrated the efficiency and reliability of the energetic management system for a solar-powered UAV in providing a constant and stable power supply to the grid throughout the flight. The findings of this study have implications for the development of high-performance UAVs by ensuring optimal and efficient selection of suitable energy sources for flight conditions and uninterrupted power supply to electrical consumers, minimizing operational risks","PeriodicalId":158636,"journal":{"name":"Review of the Air Force Academy","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115902783","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 CHILD WITH SPECIAL EDUCATIONAL NEEDS (SEN): A HISTORY OF SOCIAL PERCEPTION 有特殊教育需要的儿童:社会知觉史
Review of the Air Force Academy Pub Date : 2022-12-22 DOI: 10.19062/1842-9238.2022.20.1.7
Anamaria PETCU (RADU)
{"title":"THE CHILD WITH SPECIAL EDUCATIONAL NEEDS (SEN): A HISTORY OF SOCIAL PERCEPTION","authors":"Anamaria PETCU (RADU)","doi":"10.19062/1842-9238.2022.20.1.7","DOIUrl":"https://doi.org/10.19062/1842-9238.2022.20.1.7","url":null,"abstract":"The complexity of situations in the educational sphere generated by the presence of people at risk, in vulnerable situations is currently one of the priorities of governments worldwide. Historical periods show us that their social perception and acceptance was not at all favorable, on the contrary, attitudes ranged from hostility to extermination programs. History shows us that the separation of people with disabilities from others was determined by the fear of contamination and also by the desire to escape responsibility regarding those who were a burden to society and considered useless.","PeriodicalId":158636,"journal":{"name":"Review of the Air Force Academy","volume":"275 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128633936","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
MANEUVERABILITY, ONE OF THE MOST IMPORTANT FEATURES OF AIR DEFENCE SYSTEMS 机动性是防空系统最重要的特征之一
Review of the Air Force Academy Pub Date : 2022-12-22 DOI: 10.19062/1842-9238.2022.20.1.2
Bogdan Chioseaua, Vasile-Ioan Şandru
{"title":"MANEUVERABILITY, ONE OF THE MOST IMPORTANT FEATURES OF AIR DEFENCE SYSTEMS","authors":"Bogdan Chioseaua, Vasile-Ioan Şandru","doi":"10.19062/1842-9238.2022.20.1.2","DOIUrl":"https://doi.org/10.19062/1842-9238.2022.20.1.2","url":null,"abstract":"The basic Surface-to-Air Missile System (SAMS) mission is to combat and destroy the aerial threats on the close and direct ways of access to the defended anti-aircraft objectives, before they fulfil their mission. The main features of Air Defence Systems will aim to increase the effectiveness, Electronic Counter-Counter Measures (ECCM), short reaction time, mobility and stability in work during the day or at night regardless of the weather conditions.","PeriodicalId":158636,"journal":{"name":"Review of the Air Force Academy","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121155700","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
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