Gotowe bibliografie tematyczne / UAV

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Gotowa bibliografia na temat „UAV”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 7 lipca 2024

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Artykuły w czasopismach na temat "UAV"

Ye, Jia, Chao Zhang, Hongjiang Lei, Gaofeng Pan i Zhiguo Ding. "Secure UAV-to-UAV Systems With Spatially Random UAVs". IEEE Wireless Communications Letters 8, nr 2 (kwiecień 2019): 564–67. http://dx.doi.org/10.1109/lwc.2018.2879842.

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Li, Huadong, Yiliang Liu, Daochun Li, Dawei Bie i Zi Kan. "Ground Test and Numerical Simulation of Aerodynamic Interference of the Marsupial UAS". Aerospace 10, nr 2 (14.02.2023): 175. http://dx.doi.org/10.3390/aerospace10020175.

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The marsupial unmanned aircraft system (UAS) consists of a large parent unmanned aerial vehicle (UAV) and multiple small children UAVs that can be launched and recovered in the air. The employment of marsupial UAS can expand the mission range of small UAVs and enhance the collaborative capabilities of small UAVs. However, the serious aerodynamic interference between the parent UAV and the child UAV will affect the flight safety during the launch and recovery process. In this paper, the interference characteristics of marsupial UAS is investigated through ground tests and CFD simulation. Ground tests compared the lift and power of the child UAV with and without parent UAV interference in different areas, and the simulation extended the experimental scope. Three specific interference regions above the parent UAV are defined, including the area above the rotors, the area above body and the transition area. In the first two aeras, the variation of the disturbed lift is more than 30% of the child UAV weight. In the transition aera, the child UAV will be subjected to significant lift variations and asymmetric moments. According to the interference characteristics of different regions, the safe flight boundaries and the appropriate paths of children UAVs are proposed.

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Nopiani, Yanti, Dewi Fortuna Ayu, Evy Rossi, Yelmira Zalfiatri i Siti Nurhajijah. "PENGARUH TEPUNG AMPAS KEDELAI DALAM PEMBUATAN FLAKES UBI JALAR MERAH". Jurnal Teknologi Pertanian 24, nr 2 (31.08.2023): 95–104. http://dx.doi.org/10.21776/ub.jtp.2023.024.02.3.

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Penelitian ini bertujuan untuk mengkaji pengaruh penambahan tepung ampas kedelai terhadap mutu flakes dari tepung ubi jalar merah. Rancangan Acak Lengkap (RAL) digunakan dalam penelitian ini, dengan 6 perlakuan dan 3 ulangan. Perlakuan yang digunakan adalah penggunaan rasio tepung ubi jalar merah dan tepung ampas kedelai (w/w): UA0 (100:0%), UA1 ( 90:10%), UA2 (80:20%), UA3 (70:30%), dan UA4 (60:40%) dan UA5 (50:50%). Data yang diperoleh dianalisis secara statistik dengan menggunakan ANOVA dan diuji lanjut dengan DNMRT pada taraf 5%. Rasio penggunaan tepung ubi jalar merah dan tepung ampas kedelai berpengaruh nyata terhadap kadar air, abu, lemak, protein, serat kasar, ketahanan renyah flakes di dalam susu, dan uji sensori secara deskriptif dan hedonik (warna, aroma, tekstur dan rasa). Flakes terpilih adalah perlakuan UA2 (80:20%) yang memiliki kadar air, abu, lemak, protein, serat kasar 5,30%, 3,87%, 1,83%, 6,52%, dan 5,59%, sementara lama kerenyahan di dalam susu selama 163 detik. Hasil uji deskriptif UA2 adalah flakes berwarna orange kecoklatan, memiliki aroma ubi jalar, bertekstur agak renyah dan memiliki rasa ubi jalar merah. Selanjutnya hasil uji hedonik UA2 menunjukkan bahwa panelis menyukai flakes dari segi warna, aroma, tekstur dan rasa.

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Silva, Mário, i Jorge Silva. "Management of urban air logistics with unmanned aerial vehicles: The case of medicine supply in Aveiro, Portugal". Journal of Airline and Airport Management 11, nr 1 (30.06.2021): 34. http://dx.doi.org/10.3926/jairm.182.

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Purpose: This research aims to investigate the relation between urban logistics and all delivery systems used. The unmanned aerial vehicle (UAV) and the unmanned aerial system (UAS) have been under investigation in the world of logistics, having been pointed as the next logistic technology. For that reason, this article proposes the use of UAV in urban logistics.Design/methodology/approach: We set for the methodology study the current state of this system and analyze what lies ahead soon. Based on this information, we intend to implement a scenario of deliveries in an urban environment. This scenario will be in the city of Aveiro and consists of the delivery of medicines into pharmacies located in an urban environment. With this study, we pretend to find the best current and future solution to operate in an urban environment, with the conventional vehicle or the UAV/UAS.Findings: The legal implications for the use of UAV/UAS are one important factor that can set back the use of these technologies due to the lack of legislation. Although this technology has some limitations in endurance and payload, this investigation reached a consensus in the use of UAV for logistics in urban areas, in small payloads (around 15 kg), and low endurance (around 25 min). The UAV/UAS brings excellent advantages that the conventional vehicle cannot overcome: direct routes; traffic congestion; and environmental legislation.Practical implications: This study brings an overview of a possible scenario for urban logistics. Although this is currently not possible, soon, this scenario could be implemented. This would bring a reduction in operation costs and reduce the congestion in the urban cores of the cities.Originality/value: Based on this research, this delivery system could, in the future, help and be the starting point for UAV/UAS logistics, specifically in the delivery of medicines.

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Szabolcsi, Róbert. "The Quadrotor-Based Night Watchbird UAV System Used In The Force Protection Tasks". International conference KNOWLEDGE-BASED ORGANIZATION 21, nr 3 (1.06.2015): 749–55. http://dx.doi.org/10.1515/kbo-2015-0126.

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Abstract The Unmanned Aerial Vehicles (UAV), or Unmanned Aerial Systems (UAS) are widely used today in real time, high precision reconnaissance missions. The UAS can lean on various types of the UAVs, whilst this paper deals only with multirotor UAV applications. The special flying abilities of the multirotor UAVs (e.g. vertical take-off and landing, hovering, flying at extremely low altitudes and airspeeds) open new areas in UAV applications. Challenges of the modern era put many problems to be solved such as problems of safeguarding in civil life, handling disaster management tasks, border control, and, finally, solution of force protection tasks in operational theatre, or out of war theatre. Author will lay down a brand-new concept of the UAV system applied in bad visibility to improve efficiency of the solution of the force protection tasks, which reduces human resources needed for this purpose. The proposed Night Watchbird UAV system is a new one using modern methods and principles to reach basic goal of reconnaissance providing real-time information for commanders, and for military forces, in general.

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Hu, Xiaodan, Yifan Li, Han Wu, Zhijie Liu i Jiyu Li. "A YOLOv3-Based Rice Vortex Detecting System Using Dual Collaborative UAVs". Journal of the ASABE 65, nr 5 (2022): 1133–40. http://dx.doi.org/10.13031/ja.14994.

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HighlightsUsed dual collaborative UAVs to track the rice vortex formed on rice canopy.A trained YOLOv3-tiny model was used to recognize and calculate the rice vortex parameters with high accuracy.Discovered a quantitative relationship between rice vortex parameters and UAV flight parameters.Aligned the time axis of data process to enhance the accuracy of the vortex parameter calculation.Abstract. A rice vortex generated by the downwash airflow of the agricultural UAV has a great connection to pesticide droplet deposition. In this study, an unmanned aircraft system (UAS) was designed to obtain rice vortex parameters including position coordinates, area, and relative distance to the UAV. The system uses the flight control system mounted Beidou RTK positioning system and Manifold onboard computer to localize the spraying UAV and trains a YOLOv3-tiny model to recognize motion images of dynamic rice vortices in real-time, achieving a mean accuracy of 98.15% with 0.9326 IOU. Moreover, to optimize the system, a data time axis alignment method based on the robot operating system (ROS) was proposed to alleviate the transmission delay and image processing time-consumption, which increased the accuracy of the vortex parameter by 3.48%. The rice vortex area acquired by the UAS was highly relevant to UAV flight parameters and the relative distance was just correlated to the UAV height. The instantaneous status of the rice vortex helps to lay a data foundation for adjusting the flight parameters of the plant protection UAV. Keywords: Precision agriculture, Rice vortex, ROS, Spray operation, UAV, YOLOv3-tiny.

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Blagodaryashchev, I. V., M. A. Kiselev, R. S. Naumov i V. S. Shapkin. "Topical issues of personnel training in the field of unmanned aircraft systems". Civil Aviation High Technologies 25, nr 4 (6.09.2022): 8–19. http://dx.doi.org/10.26467/2079-0619-2022-25-4-8-19.

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The legal regulation, and hence, the training system in the field of unmanned aircraft systems (UAS) in the Russian Federation, the European Union and the United States is based on the unmanned aerial vehicles (UAV) rating with respect to UAS maximum take-off weight (MTOW) and their purpose (method of use). In this regard, small-unmanned aircraft (sUAS) are identified – in our country up to 30 kg, in the EU and the USA up to 55 lbs (25 kg) and UAV with larger weight. In the USA and Europe, the training of remote pilots for sUAS is differentiated based on the degree of risk that UAV can represent for public safety. Thus, the training of remote pilots to use UAVs with MTOW less than 25 kg (55 lbs) in a sparsely populated area during daylight hours under the conditions of visual range is conducted in the online format, the result of which is taking tests. In the United States and Europe, the UAV application with MTOW more than 25 kg (55 lbs) or performing UAV operations, presenting a potential risk for public safety, requires more comprehensive and long-term training of remote pilots. In the Russian Federation, UAS personnel training is conducted in educational organizations according to different programs, which vary significantly depending on a specific type of aviation UAVs refers to: State, Civil or Experimental. UAS personnel training programs for various aviation types are not harmonized, which leads to the failure to credit previously received education in training to perform activities in another aviation type. The article describes the analysis results of the international and national experience, perspectives for the development of the UAS personnel training system, as well as formulates the proposals concerning further development of the national system for UAS specialists training.

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Tkachyck, P., O. Kotcemyr, S. Sokolovskyi i D. Bilous. "Accounting for real meteorological conditions at the time of UAV flight mission planning". Military Technical Collection, nr 25 (21.12.2021): 54–60. http://dx.doi.org/10.33577/2312-4458.25.2021.54-60.

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The article is dedicated to the the problem of not considering the real meteorological conditions in planning the flight task of the unmanned aerial vehicle (UAV) A1-CM Furia . Unmanned aerial system(UAS) A1-CM Furia has been developed and manufactured by LLC SPC Athlon Avia since 2014. Within 2019-2020, the UAS passed a full spectrum of state tests and was adopted by the Armed Forces of Ukraine. The main criteria that this UAS meets are the detection and tracking of enemy objectives, equipment maintenance and target reconnaissance. Among the peculiarities of UAV application are performance of tasks in adverse meteorological conditions, the use of radio-electronic suppression by the opposing parties, significant spatial characteristics of the areas of responsibility of units and subdivisions for reconnaissance and engagement. The change in the charge current of the battery depending on the air temperature and the change in the charge current of the battery depending on the wind speed in different meteorological conditions were analyzed in the article. The article presents experimental results that determine the order of current consumption for battery time depending on meteorological factors, such as wind speed and air temperature. These results indicate that the UAV A1-CM Furia during the task accomplishment can not meet the flight characteristics that are defined in the flight operation manual UAS (FAM). The FAM does not separate the differences in the use of UAV in different meteorological conditions. This causes possible errors in calculating the maximum length of the route and the maximum possible time in the air. In the article it was proposed to develop a correction for the use of UAV depending on changes in wind speed and temperature . During the assessing of possible corrections for the use of UAV at different wind speeds and air temperatures, the accuracy of determining the possible values of the maximum route length and maximum time of UAV in the air allows us to calculate more accurate data for future tasks accomplisment. Experimental methods of calculating corrections took a large part in the specific study of information without taking into account the real meteorological conditions while planning the flight task of the UAV A1-CM Furia. The obtained results show that without further consideration of meteorological conditions while planning a flight task there may be inaccuracies.

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Zhang, Jingmin, Xiaokui Yue, Haofei Zhang i Tiantian Xiao. "Optimal Unmanned Ground Vehicle—Unmanned Aerial Vehicle Formation-Maintenance Control for Air-Ground Cooperation". Applied Sciences 12, nr 7 (1.04.2022): 3598. http://dx.doi.org/10.3390/app12073598.

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This paper investigates the air–ground cooperative time-varying formation-tracking control problem of a heterogeneous cluster system composed of an unmanned ground vehicle (UGV) and an unmanned aerial vehicle (UAV). Initially, the structure of the UAV–UGV formation-control system is analyzed from the perspective of a cooperative combat system. Next, based on the motion relationship between the UAV–UGV in a relative coordinate system, the relative motion model between them is established, which can clearly reveal the physical meaning of the relative motion process in the UAV–UGV system. Then, under the premise that the control system of the UAG is closed-loop stable, the motion state of the UGV is modeled as an input perturbation. Finally, using a linear quadratic optimal control theory, a UAV–UGV formation-maintenance controller is designed to track the reference trajectory of the UGV based on the UAV–UGV relative motion model. The simulation results demonstrate that the proposed controller can overcome input perturbations, model-constant perturbations, and linearization biases. Moreover, it can achieve fast and stable adjustment and maintenance control of the desired UAV–UGV formation proposed by the cooperative combat mission planning system.

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An, Namwon, Kyung-Mee Lim i So-Young Jeong. "Acquiring Precise Coordinates of Ground Targets through GCP Geometric Correction of Captured Images in UAS". Journal of the Korea Institute of Military Science and Technology 26, nr 2 (5.04.2023): 129–38. http://dx.doi.org/10.9766/kimst.2023.26.2.129.

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Acquiring precise coordinates of ground targets can be regarded as the key mission of the tactical-level military UAS(Unmanned Aerial System) operations. The coordinates deviations for the ground targets estimated from UAV (Unmanned Aerial Vehicle) images may depend on the sensor specifications and slant ranges between UAV and ground targets. It has an order of several tens to hundreds of meters for typical tactical UAV mission scenarios. In this paper, we propose a scheme that precisely acquires target coordinates from UAS by mapping image pixels to geographical coordinates based on GCP(Ground Control Points). This scheme was implemented and tested from ground control station for UAS. We took images of targets of which exact location is known and acquired the target coordinates using our proposed scheme. The experimental results showed that errors of the acquired coordinates remained within an order of several meters and the coordinates accuracy was significantly improved.

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Rozprawy doktorskie na temat "UAV"

Andersson, Per-Olov. "UAV/UCAV i fredens tjänst : UAV/UCAV och dess operativa betydelse i framtida Peace Support Operations". Thesis, Försvarshögskolan, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-1898.

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Luftstridskrafter har spelat en betydande roll i senare tiders Peace Support Operations (PSO). Obemannade flygande system har varit en del av dessa insatser, hur kommer rollfördelningen att vara i framtiden? Syftet med uppsatsen är att undersöka och göra en bedömning avseende hur obemannade flygsystem kan utnyttjas och ha en roll i framtida Peace Suport Operations. Litteratur- och dokumentstudier, föreläsningar och intervjuer ligger som faktabakgrund för bedömningen av hur en framtida PSO kan se ut samt vilken roll obemannade flygsystem kan ha i en framtida Peace Suport Operation. Jämförelse har skett mellan bemannade och obemannade flygande system varvid fördelar och nackdelar har belysts. Resultatet av studien är att obemannade flygande system bör kunna få en betydande roll i framtida Peace Suport Operations främst avseende underrättelseinhämtning och uppgifter där vapenleverans inte är huvuduppgiften. Obemannade flygande farkoster med stridsuppgift (UCAV) har däremot betydande hinder som måste övervinnas innan dessa kan få en viktig roll i framtida PSO. Det är inte uteslutet att UCAV efter en tids utveckling kan få en viktig roll i en framtida PSO främst inom uppgifter som karaktäriseras av stor risktagning, krav på lång uthållighet eller uppträdande i ohälsosam miljö.
Avdelning: ALB - Slutet Mag 3 C-upps.Hylla: Upps. ChP 99-01

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Hajri, Riadh. "UAV to UAV Target Detection and Pose Estimation". Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/7351.

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The objective of this thesis is to investigate the feasibility of using computer vision to provide robust sensing capabilities suitable for the purpose of UAV to UAV detection and pose estimation using affordable CCD cameras and open coding libraries. We accomplish this by reviewing past literature about UAV detection and pose estimation and exploring comparison of multiple state-of-the-art algorithms. The thesis presents implementation studies of detection approaches including color-based detection and component-based detection. We also present studies of pose estimation methods including the PosIt algorithm, homography-based detection, and the EPFL non-iterative method. The thesis provides a preliminary strategy for detecting small UAVs and for estimating its six degree of freedom (6DOF) pose from image sequences within the prescribed airspace. Discussion of its performance in processing synthetic data is highlighted for future applications using real-life data sets.

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Stalmakou, Artsiom. "UAV/UAS path planning for ice management information gathering". Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13232.

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The key objective of this work is the proposition of the path planning strategy for unmanned aerial vehicle (UAV) intended for information gathering in Arctic environments / ice-infested regions. Two diﬀerent path planning strategies are considered; one for analysis of the surveillance area deﬁned as a grid and the other for analysis of the surveillance area deﬁned as a sector. The mixed integer linear programming (MILP), YALMIP modeling language and GUROBI optimizer are used for formulation and solution of the path planning optimization problems. Furthermore, both path planning strategies are tested for the cases of constant and variable ice ﬂow, respectively; the following are investigated in each simulation case: ﬂight path of the UAV, coverage of the surveillance area, speed and acceleration of the UAV and the solver-time. Moreover, throughout this work only a planar motion is considered, with one single UAV used in each simulation case.

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Holtby, Johan. "Autonom UAV". Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-168611.

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In Abisko National Park there are a numberof weather stations. To be able toretrieve the data from the nodes in thefuture a Quadrocopter-prototype has beendeveloped during this master thesisproject as a first step. A quadrocopter isa helicopter with four rotors placed in across formation. The quadrocopter cannavigate autonomous between different GPSpositionsthat are updated during flighttrough Xbee-modules. All levels fromsources code, design of the electronics todevelopment of the chassis was performedduring the project. During GPS-navigationthe quadrocopter can achieve a stationaryposition with a mean stationary offset ofless than 0.5 meters even in light winds.
I Abisko Nationalpark finns det ett antal väderstationer. För att på sikt kunna läsa av väderdata från dessa har en quadrocopter-prototyp utvecklats i detta examensarbete. En quadrocopter är en helikopter med fyra rotorer placerade i ett kryss. Quadrocoptern kan navigera autonomt mellan olika GPS-positioner som ges trådlöst via Xbee-moduler. Alla nivåer från källkod, design av elektronik till utformning och tillverkning av chassit har gjorts inom detta projekt. Vid GPS-navigering kan quadrocoptern uppnå en stationär position med en medelvärdesavvikelse mindre än 0.5 meter trots lättare vindar.

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Dahl, David, i Fredrik Stetler. "UAV Antarctica". Thesis, KTH, Skolan för teknikvetenskap (SCI), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152700.

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One of the biggest problems of our time is the global warming. A direct result of this phenomena is the melting of ice of the glaciers on the north and the south pole. As this continues, the melted ice will contribute to an increase of the sea level, and may cause enormous natural disasters. To be able to prevent this, it’s important to study its affects. This reports contains a concept study of a Unmanned Aerial Vehicle, a UAV, set on the coast of Antarctica by the Australian owned base Davis Station to document the changes and retracting of the glacier borderline. The purpose of the aircraft is to scout a pre-determined path whilst documenting the glaciers with photography from above.

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Ljungbäck, Jacob, i David Williamsson. "UAV Helikoptertransmission". Thesis, KTH, Maskinkonstruktion (Inst.), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176309.

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En grupp på Maskinkonstruktion, KTH har påbörjat arbetet med att utveckla en UAV helikopter (Förarlös helikopter) som framförallt är tänkt att användas vid minröjning. Ramen, rotorerna och motorn är valda och tillverkade men det behövs en transmission från motorn till rotorerna. Denna rapport innehåller utvecklingen av den transmissionen inklusive centrifugalkoppling, axlar och lager. Målet med arbetet är att utforma hela transmissionen från idé till färdig konstruktionslösning med tillhörande CAD modell. Arbetet innefattar däremot inte val av tillverkningsmetod, testflygning med färdig transmission eller vidare arbete för att omkonstruera konstruktionen vid behov. Samtliga delar som skall konstrueras har som mål att ha så låg vikt som möjligt. Vid projektets början utfördes en informationsökning där sökning på internet efter liknande konstruktionslösningar samt möte med uppdragsgivarna genomfördes för att få en bild av projektets omfattning, lista deras önskemål och krav. Dessutom utfördes litteraturstudier både i tidigare kurslitteratur och vetenskapliga rapporter inom området. Konceptframtagningen utfördes med hjälp av en brainstorming och kravspecifikation. En QFD matris användes för att omvandla uppdragsgivarnas krav och önskemål till konkreta produktegenskaper för att göra kravspecifikationen. Plastkugghjul och smala axlar i stål visade sig vara önskvärda. Resultatet blev tre olika koncept. För att uppfylla uppdragsgivarnas och projektdeltagarnas krav och önskemål valdes ett koncept med dubbla kuggremmar och en kuggväxel eftersom det konceptet fick bäst resultat i beslutsmatrisen. Med hjälp av analytiska beräkningar och Fem modeller dimensionerades transmissionen så att kravspecifikationen uppfylldes. Plastkugghjulen och kuggremmarna uppfyllde dock inte kravet om minimal säkerhetsfaktor på 1,6. För att kunna optimera konstruktionen ännu mer måste en testflygning genomföras för att utvärdera de laster som verkar på komponenterna. När dessa är kända är det troligen möjligt att minska vikten. För att minska vikten ytterligare bör en konstruktionslösning med smörjmedel användas eftersom det möjliggör betydligt högre krafter och kontakttryck i kugghjulen som då kan bli betydligt mindre. Uppdragsgivarna bör därför överväga om transmission som utformats i denna rapport med en total vikt på ca 1,8 kg skall användas eller om en dyrare och mer komplicerad konstruktion skall väljas för att minska vikten.
A group of researchers at the department of Machine Design KTH are working with the development of a UAV helicopter (unmanned helicopter) which main purpose is demining. The frame, rotor blades and engine are already chosen but a transmission is also needed. This Bachelor thesis contains the development of the transmission including the centrifugal clutch, shafts and bearings. The goal of the thesis is to design a transmission with a structured product development process and to produce a complete CAD model. The thesis will not include choosing manufacturing methods, test flight with the finish transmission or detail design. The weight should be as low as possible for all parts. At the beginning of the project, an information retrieval was made on the internet, old course books and scientific journals to find similar designs. To understand the project and to know what the clients wanted and their demands, a meeting was also accomplished. The conceptual design was achieved with the help of brainstorming and analyzing the product requirements. To find out the requirements, a QFD matrix was used to transform the client’s wishes and demands into product features. Plastic gears and slim steel shaft scored high in the QFD and are therefore desirable. The result of the conceptual design was three concepts. To find out which of the concept that meets the client’s and project member’s demands best, a decision matrix was used. The result was that the concept with twin belts and one gearbox scored highest and was therefore chosen. To design the transmission in a way that meets the product requirements, both analytical- and FEM calculations were done. Only the plastic gears and the belt didn’t meet the requirement that the safety factor should at least be 1,6. To optimize the design further a test flight is needed to measure the forces that are applied on the transmission. After the test flight the forces are known and therefore it’s probably possible to reduce the weight. To reduce the weight even further a design with lubricated gears would make the gears smaller and lighter since the lubricant enables higher contact pressure. The clients should therefore consider a more expansive and complicated design if the weight should be reduced from the 1, 8 kg that the current design weighs.

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BOZKURT, Ugur, i Mustafa Aslan. "Assembly of a UAV : hardware design of a UAV". Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-3247.

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This bachelor thesis is dedicated to assemble the hardware system of a UAV (Unmanned Aerial Vehicle) in order to prepare the platform for an autonomous flight in the air for a given path through the pre-programmed check points. A UAV is an aircraft that contains sensors, GPS, radio system, servomechanisms and computers, which provide the capability of an autonomous flight without a human pilot in the cockpit. A stable flight requires sensing the roll, pitch, and yaw angles of aircraft. Roll and pitch angles were ensured by a sensor system of FMA Direct Company called co-pilot flight stabilization system (CPD4), which allows controlling ailerons and elevator manually.

An autopilot is required for steering the aircraft autonomously according the GPS data and the establish waypoints that the airplane have to pass by. The GPS gives heading information to the autopilot, and this uses the information of the next waypoint to decide which direction to go. Hereby an autonomous flight is provided. In this project a lego mindstorm NXT was used as an autopilot that is product of LEGO Company [1]. The output of the autopilot is used to control the airplane servos to fly in the desired direction. A software and hardware interface was designed to allow the autopilot to receive the data from the co-pilot sensor and to transmit data to the co-pilot processor, which will finally steer the actuator servos. Experiments were performed with different parts of the system and the results reported.

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Blomberg, Andreas. "Utvärdering av mätosäkerheten vid georeferering med UAS och Post Processed Kinematic-GNSS". Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-22145.

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UAS has been become a very popular tool in surveying and evaluation of the systems measurement uncertainties are necessary. The most common method for georeferencing UAS data is to use ground control points (GCP) in order to use them in block adjustment. In recent years’ new techniques for direct georeferencing with UAS have been presented, which in theory means that the position of the UAS can be determined accurately enough and therefore GCP’s can be excluded. This study evaluates uncertainties of the UAS Freya from SmartPlanes that don’t need GCP’s for georeferencing. The technique applied in the evaluation is based on Post Processed Kinematic (PPK) for coordinate determination of the UAS, which means that the collected GNSS data can be post processed using a reference station. The test area was a 280 x 320 m block in the north end of Gävle airport, Sweden. Each flight is conducted in two orthogonal blocks and evaluated in three different ways against the 16 GCP. The altitude was about 90 m for all flights. The uncertainty of the PPK-technique is tested and evaluated with three different methods to ensure both accuracy and potential use. In total five flights were assessed and evaluated with Agisoft PhotoScan against 16 GCP spread over the area. The position of each GCP’s was determined with four independent network RTK measurements. The results show that the georeferencing with the PPK-technique and block adjustment has potential to meet the uncertainties in level with indirect georeferencing using GCP. The results show very similar planimetric uncertainties, around 0,020 m in RMS, for all evaluations with the PPK-technique. The results of the uncertainty in height is more scattered where the two lowest results in a RMS under 0,015 m and the highest over 0,100 m for the difference against the 16 GCP. It is possible to achieve low uncertainties with the method without the use of GCP. For areas where establishment of GCP is not possible, using UAS equipped with PPKtechnology provides a very suitable alternative to use. The results show relatively large differences between the evaluations and in order to determine the exact cause of them, further studies are required.
Den starka teknikutvecklingen för UAS resulterar i flera nya produkter på marknaden och för att utvärdera deras mätosäkerheter krävs det kontroller av systemen. Den vanligaste metoden vid georeferering med UAS är att använda koordinatbestämda flygsignaler på marken. På senare år har metoder för direkt georeferering presenterats, vilket i teorin innebär att positionen för UAS kan bestämmas så pass noggrant att flygsignaler kan uteslutas. I denna studie utvärderas mätosäkerheter för Freya, ett UAS från SmartPlanes som med hjälp av bra positionering och blockutjämning ska kunna användas för georeferering utan flygsignalering. Systemet från Smartplanes bygger på Post Processed Kinematic (PPK) för koordinatbestämning, vilket innebär att insamlat GNSS data kan efterberäknas med korrektioner från en referensstation. Mätosäkerheten för PPK-tekniken testas och utvärderas med 3 olika metoder för att se både på mätosäkerhet samt möjlig användning. Totalt fem flygningar har utförts på ett testområde som var cirka 280x320 m och beläget i den norra delen av Gävle flygplats. Flyghöjden var kring 90 m för alla flygningar som vidare har bearbetats och utvärderats i programvaran PhotoScan från Agisoft. Kontrollen av mätosäkerheten har gjorts mot 16 spridda kontrollpunkter på marken som har positionsbestämts med fyra oberoende nätverks-RTK mätningar vardera. Varje flygning är utförd i två ortogonala block och utvärderades med fyra olika konfigurationer mot de 16 kontrollpunkterna. Resultaten visar att georeferering med hjälp av blockutjämning och PPK-tekniken har potential för att uppnå mätosäkerheter i nivå med indirekt georeferering med hjälp av stödpunkter på marken. I plan visar resultaten på väldigt jämna mätosäkerheter, kring 0,020 m i RMS, för alla utvärderingar med PPK-tekniken. Resultaten i höjd är mer spridda där de lägsta visar mätosäkerheter under 0,015 m RMS och de högsta över 0,100 m i RMS för avvikelsen mot kontrollpunkterna. Det är fullt möjligt att uppnå låga mätosäkerheter med metoden utan användning av stödpunkter. För användningsområden där stödpunkter inte kan etableras är detta UAS med PPK-tekniken ett mycket lämpligt alternativ att använda. Resultaten visar på relativt stora skillnader mellan de olika testade metoderna och för att avgöra den exakta orsaken till dem skulle vidare studier behövas.

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Grafström, Erik, Erik Hansson i Max Morén. "Quadrotor UAV : Konstruktion och användbarhetsstudie av en UAV i sensornätverk". Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-143813.

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Quadrotor UAVs are self-stabilizing, autonomous flying machines that has recently become more popular than ever. Unmanned Aerial Vehicles have their roots in the military, where they were developed for use in reconnaissance and combat. During the last few years, advances in the fields of electronic sensors, electric motors and microcontrollers have enabled smaller designs and autonomic flight control even for private use. The quadrotor, which is the particular kind of UAV we are looking closer at in this paper, has 4 rotors in an X-like formation. This configuration has many advantages such as good lift capacity, non-complex mechanical structure and serviceability. In this project we aquired a current overview of the domain and determine whether it is possible to construct a quadrotor UAV designed for use in a WISENET sensor network on a low budget and short time schedule. Based on existing community project AeroQuad, a quadrotor is constructed with a budget of about 500 euro. Combining theoretical and practical analysis, we conclude that a quadrotor UAV can be constructed within the given specifications.

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Löfqvist, Ulf. "Kollisionsundvikning för UAV". Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8192.

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I en obemannad flygfarkost måste datorer ta över pilotens förmåga att värdera risker och undvika kollisioner. På algoritmnivå brukar man dela in problemet i tre delar: Upptäckt och estimering av inblandade farkosters positioner och hastigheter, kollisionsriskberäkning och slutligen undanmanöver.

Saabs arbete med obemannade farkoster har tidigare berört kollisionsundvikning lite ytligt men nu börjat på större allvar. Det här examensarbetet är en del i denna satsning och har resulterat i ett sätt att beräkna kollisionsrisken samt ett sätt att beräkna en undanmanöver, givet att de inblandade farkosternas positioner och hastigheter är kända.

I examensarbetet behandlas parvisa kollisionsscenarier mellan ickekommunicerande farkoster givet två olika fall. Dels där den främmande farkostens position skattats väl, dels där den främmande farkostens position skattats sämre. En enkel simuleringsmiljö har utvecklats, där två algoritmer för beräknandet av kollisionsrisken, en för varje fall, testats samtidigt som undanmanövern testats för en mängd kollisionsscenarier. Givet att den främmande farkostens position skattats väl behöver den obemannade farkosten cirka 6 s på sig för att kunna undvika en kollision. I fallet där den främmande farkostens position skattats sämre kan vi beräkna kollisionsrisken och i vissa fall sluta oss till hur farkosterna är orienterade och därigenom göra ett undanmanöverval.

Saabs work with unmanned aerial vehicles has only scratched the surface of collision avoidance, but is now advancing. This master thesis sheds light on some parts of the collision avoidance problem and has resulted in an innovative way to calculate the risk of collision and a way to determine an avoidance maneuver.

In this master thesis collision scenarios between non-communicating vehicles are being looked upon in pairs, given two different sets of data. Good estimates of the unknown vehicles position and unsatisfying position estimate. Through the development of a simple simulation environment, two algorithms, one for each set of data, has been tested simultaneously with tests of the collision avoidance maneuver for several collision scenarios. Given a good estimate of the unknown aerial vehicles position, the unmanned vehicle need approximately 6 seconds to act to avoid a collision. For the case with unsatisfactory estimate of the unknown vehicle the risk of collision can be calculated and in some cases the orientation of the aerial vehicles and thus a choice of avoidance maneuver can be made.

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Książki na temat "UAV"

Gerken, Louis. UAV-- unmanned aerial vehicles. Chula Vista, Calif., U.S.A: American Scientific Corp., 1991.

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Fahlstrom, Paul Gerin. Introduction to UAV systems. Wyd. 4. Hoboken, NJ: John Wiley & Sons, 2012.

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Nawrat, Aleksander, i Zygmunt Kuś, red. Vision Based Systemsfor UAV Applications. Heidelberg: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00369-6.

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Nawrat, Aleksander. Vision Based Systemsfor UAV Applications. Heidelberg: Springer International Publishing, 2013.

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Pan, Gaofeng, Xiaqing Miao, Xuanhe Yang i Ziyi Yang, red. UAV Communications: Modeling and Analyses. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-0383-8.

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Fahlstrom, Paul Gerin, i Thomas James Gleason. Introduction to UAV Systems, Fourth Edition. Chichester, UK: John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118396780.

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Marqués, Pascual, i Andrea Da Ronch, red. Advanced UAV Aerodynamics, Flight Stability and Control. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781118928691.

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Papageorgiou, Evangelos C. Development of a dynamic model for a UAV. Monterey, Calif: Naval Postgraduate School, 1997.

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Austin, Reg. Unmanned air vehicles: UAV design, development, and deployment. Chichester, West Sussex, U.K: Wiley, 2010.

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Bai, Lu, Ziwei Huang i Xiang Cheng. Propagation Characterization and Channel Modeling for UAV Communications. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-57503-7.

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Części książek na temat "UAV"

Ye, Jia, Yanci Si i Gaofeng Pan. "UAV-to-UAV Communications". W UAV Communications: Modeling and Analyses, 87–112. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-0383-8_3.

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Ranjan, Prashant, Ram Shringar Rao, Krishna Kumar i Pankaj Sharma. "UAV". W Wireless Communication, 151–62. New York: CRC Press, 2022. http://dx.doi.org/10.1201/9781003181699-8.

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Zhang, Yan. "Mobile Edge Computing for UAVs". W Simula SpringerBriefs on Computing, 65–80. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-83944-4_6.

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AbstractThis chapter studies mobile edge computing (MEC) networks assisted by unmanned aerial vehicles (UAVs). According to the application scenarios, we consider three roles for UAVs in MEC networks: exploiting MEC computing capabilities, serving as a computing server, and serving as a relay for computation offloading. Furthermore, the details for resource allocation and optimization are presented in the three scenarios of UAV-assisted MEC networks. In addition, we focus on the situation in which a UAV not only functions as an MEC server to inspect turbines on a wind farm, but also performs task computation. To facilitate wide applications of UAV-assisted MEC in practice, this chapter highlights the main implementation issues of UAV-assisted MEC, including optimal UAV deployment, wind models, and joint trajectory–computation performance optimization.

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Duan, Haibin. "Multiple UAV/UGV Heterogeneous Control". W Bio-inspired Computation in Unmanned Aerial Vehicles, 183–214. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-41196-0_6.

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Valavanis, Kimon P., i George J. Vachtsevanos. "Networked UAVs and UAV Swarms: Introduction". W Handbook of Unmanned Aerial Vehicles, 1983–85. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-90-481-9707-1_146.

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Al-Kaff, Abdulla, Francisco Miguel Moreno, Luis Javier San José, Fernando García, David Martín, Arturo de la Escalera, Alberto Nieva i José Luis Meana Garcéa. "VBII-UAV: Vision-Based Infrastructure Inspection-UAV". W Advances in Intelligent Systems and Computing, 221–31. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56538-5_24.

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Duan, Haibin, i Pei Li. "UAV Path Planning". W Bio-inspired Computation in Unmanned Aerial Vehicles, 99–142. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-41196-0_4.

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Valavanis, Kimon P., i George J. Vachtsevanos. "UAV Fundamentals: Introduction". W Handbook of Unmanned Aerial Vehicles, 241–42. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-90-481-9707-1_134.

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Valavanis, Kimon P., i George J. Vachtsevanos. "UAV Propulsion: Introduction". W Handbook of Unmanned Aerial Vehicles, 493–94. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-90-481-9707-1_136.

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Valavanis, Kimon P., i George J. Vachtsevanos. "UAV Control: Introduction". W Handbook of Unmanned Aerial Vehicles, 527–28. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-90-481-9707-1_137.

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Streszczenia konferencji na temat "UAV"

Pryor, Jacob, Scott Martin i David Bevly. "Evaluation of Cooperative UAV-UGV Navigation Strategies with Maneuvering UAVs". W 34th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2021). Institute of Navigation, 2021. http://dx.doi.org/10.33012/2021.17934.

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Lee, Jae-Keun, Hahmin Jung, Huosheng Hu i Dong Hun Kim. "Collaborative control of UAV/UGV". W 2014 11th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI). IEEE, 2014. http://dx.doi.org/10.1109/urai.2014.7057485.

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Krupas, Maros, Saahil Chand, Yuqian Lu, Xun Xu, Erik Kajati i Iveta Zolotova. "Human-Centric UAV-UGV Collaboration". W 2023 IEEE 19th International Conference on Automation Science and Engineering (CASE). IEEE, 2023. http://dx.doi.org/10.1109/case56687.2023.10260412.

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Shetty, Devdas, i Louis Manzione. "Unmanned Aerial Vehicles (UAV): Design Trends". W ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64518.

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This paper looks at the trends in design procedures in Unmanned Aerial Vehicles (UAVs). Rapid advances in technology are enabling more and more capability to be placed on smaller airframes which is spurring a large increase in the number of UAVs being deployed in the army. The military role of UAV is growing at unprecedented rates. The UAV is an acronym for Unmanned Aerial Vehicle, which is an aircraft with no pilot on board. UAVs can be remote controlled aircraft (e.g. flown by a pilot at a ground control station) or can fly autonomously based on pre-programmed flight plans or more complex dynamic automation systems. A variety of design configurations are in use. The primary driving parameters in all UAVs is the need for maximizing available wing area and wing effectiveness, while minimizing the required storage volume. The major factors in determining the relative merit of the different concepts are the evaluation of structural viability, mechanical complexity and overall system survivability by G forces. This paper examines some of the design methodologies and hardware-in-the loop simulation environment to support and validate the UAV hardware and software development.

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Kovalev, D. I. "Analysis of the efficiency of UAV transport and technological cycle operations". W III ALL-RUSSIAN SCIENTIFIC CONFERENCE WITH INTERNATIONAL PARTICIPATION “ACHIEVEMENTS OF SCIENCE AND TECHNOLOGY, CULTURAL INITIATIVES AND SUSTAINABLE DEVELOPMENT-DNIT-III-2024”. Krasnoyarsk Science and Technology City Hall, 2024. http://dx.doi.org/10.47813/dnit-iii.2024.11.3011.

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When using UAVs in the agricultural industry, an urgent task is to analyze the efficiency of UAV transport and technological cycle (TTC) operations. Research related to the analysis of the influence of operating parameters of spraying UAVs on droplet deposition and the biological effectiveness of pesticide use reflects the indirect influence of these characteristics on the implementation of transport and technological cycles of agricultural UAVs. The paper presents a description of four typical UAVs used for plant protection in precision agriculture in China, their main technical parameters are given, and the flight parameters of the UAV during field tests are presented. The results of the analysis of the efficiency of operations of the UAV transport and technological cycle include the percentage of time operating costs of the UAV TTC. The presented analysis showed the need for work to further improve the efficiency of UAVs to achieve satisfactory results.

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Mazur, David. "The X-47A Pegasus: From Design to Flight". W 1st UAV Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-3426.

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Buffington, James. "Autonomous Airborne Re-Supply Systems for Unmanned Air Vehicles". W 1st UAV Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-3416.

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Barefoot, Terry. "The History of Global Hawk: ACTD Through EMD". W 1st UAV Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-3516.

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Lavretsky, Eugene, i Kathleen Misovec. "Phase I: Formation Flight Control Design". W 1st UAV Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-3429.

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Enderle, Bruce. "Commercial Applications of UAV's in Japanese Agriculture". W 1st UAV Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-3400.

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Raporty organizacyjne na temat "UAV"

Wackerman, Christopher. Operational Assimilation into UUV and UAV Observations. Fort Belvoir, VA: Defense Technical Information Center, styczeń 2008. http://dx.doi.org/10.21236/ada514634.

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Stoneking, Craig, Phil DiBona i Adria Hughes. Multi-UAV Collaborative Sensor Management for UAV Team Survivability. Fort Belvoir, VA: Defense Technical Information Center, sierpień 2006. http://dx.doi.org/10.21236/ada460418.

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DiMeo, Michael, Michael Kifarkis, Arshad Narmanwale, John Stanton, Sebastian Szulakiewicz, Bruce Treska, Katsuya Yonehara i Jonathan Komperda. Radiation Mapping UAV. Office of Scientific and Technical Information (OSTI), luty 2020. http://dx.doi.org/10.2172/1637620.

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Carlson, Barak J. Past UAV Program Failures and Implications for Current UAV Programs. Fort Belvoir, VA: Defense Technical Information Center, kwiecień 2001. http://dx.doi.org/10.21236/ada407103.

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Canavan, G. H. UAV sensor and survivability issues. Office of Scientific and Technical Information (OSTI), lipiec 1996. http://dx.doi.org/10.2172/366505.

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Canavan, G. H., i R. Leadabrand. Research for new UAV capabilities. Office of Scientific and Technical Information (OSTI), lipiec 1996. http://dx.doi.org/10.2172/383554.

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Bechtel, Wayne, Nathaniel Hathaway, Trevor Jerdee, Eric Laskey, Jill McConaghy, Lisa Quade, Kariym Smith, Scott Sparrow i James Tuey. Roving UAV IED Interdiction System. Fort Belvoir, VA: Defense Technical Information Center, marzec 2011. http://dx.doi.org/10.21236/ada540926.

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Lukaszewicz, Thomas B. Joint Doctrine and UAV Employment. Fort Belvoir, VA: Defense Technical Information Center, luty 1996. http://dx.doi.org/10.21236/ada307450.

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Viggh, Herbert E., Christopher Weed, Michael T. Chan i Daniel J. Van Hook. CAUSE Multi-UAV Simulation Demonstration. Fort Belvoir, VA: Defense Technical Information Center, kwiecień 2011. http://dx.doi.org/10.21236/ada570527.

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Mullens, Katheerine D., Estrellina B. Pacis, Stephen B. Stancliff, Aaron B. Burmeister i Thomas A. Denewiler. An Automated UAV Mission System. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 2003. http://dx.doi.org/10.21236/ada422026.

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