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Journal articles on the topic 'Hybride uav'

Author: Grafiati

Published: 1 February 2025

Last updated: 31 July 2025

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1

Rounakul, Islam Boby, Abdullah Khaizuran, Z. Jusoh A., Parveen Nagma, and Mahmud Md. "Adaptive control of nonlinear system based on QFT application to 3-DOF flight control system." TELKOMNIKA Telecommunication, Computing, Electronics and Control 17, no. 5 (2019): 2595–606. https://doi.org/10.12928/TELKOMNIKA.v17i5.12810.

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Research on unmanned aerial vehicle (UAV) became popular because of remote flight access and cost-effective solution. 3-degree of freedom (3-DOF) unmanned helicopters is one of the popular research UAV, because of its high load carrying capacity with a smaller number of motor and requirement of forethought motor control dynamics. Various control algorithms are investigated and designed for the motion control of the 3DOF helicopter. Three-degree-of-freedom helicopter model configuration presents the same advantages of 3-DOF helicopters along with increased payload capacity, increase stability i

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RAMESH, P. S., and J. V. MURUGA LAL JEYAN. "Comparative Analysis of Fixed-Wing, Rotary-Wing and Hybrid Mini Unmanned Aircraft Systems (UAS) from the Applications Perspective." INCAS BULLETIN 14, no. 1 (2022): 137–51. http://dx.doi.org/10.13111/2066-8201.2022.14.1.12.

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Mini Unmanned Aircraft Systems (UAS) present distinct design challenges due to their man-portable, field-deployable profile. The implications of various unmanned aerial vehicle (UAV) design configurations for Mini UAS applications are discussed in this study. Fixed-wing, rotary-wing, and hybrid Mini UAS design configurations are analysed and compared based on performance parameters specified by various manufacturers to assess appropriateness for military and civil applications. Mini UAS designed for military applications can meet most requirements in the civil domain. However, the reverse is s

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Xu, Ronghua, Sixiao Wei, Yu Chen, Genshe Chen, and Khanh Pham. "LightMAN: A Lightweight Microchained Fabric for Assurance- and Resilience-Oriented Urban Air Mobility Networks." Drones 6, no. 12 (2022): 421. http://dx.doi.org/10.3390/drones6120421.

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Rapid advancements in the fifth generation (5G) communication technology and mobile edge computing (MEC) paradigm have led to the proliferation of unmanned aerial vehicles (UAV) in urban air mobility (UAM) networks, which provide intelligent services for diversified smart city scenarios. Meanwhile, the widely deployed Internet of drones (IoD) in smart cities has also brought up new concerns regarding performance, security, and privacy. The centralized framework adopted by conventional UAM networks is not adequate to handle high mobility and dynamicity. Moreover, it is necessary to ensure devic

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Wu, Yan, Dejin Kong, Qian Wang, and Gang Li. "Performance Analysis of UAV-Assisted Hybrid FSO/RF Communication Systems under Various Weather Conditions." Sensors 23, no. 17 (2023): 7638. http://dx.doi.org/10.3390/s23177638.

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Nowadays, unmanned aerial vehicle (UAV) communication systems are commonly considered as one of the key enabling technologies for 6G. The hybrid free space optical (FSO)/radio frequency (RF) system has the advantages of both FSO and RF links to improve communication system performance, and the relay-assisted system adopts multi-hop transmission and cooperative diversity methods to extend communication coverage. Thus, a joint consideration of UAV-assistedUAV assisted relay in hybrid FSO/RF transmission is meaningful. In this paper, we aim to analyze the performance of UAV-assisted multi-hop par

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Goh, Chi Yen, Chee Yen Leow, and Rosdiadee Nordin. "Energy Efficiency of Unmanned Aerial Vehicle with Reconfigurable Intelligent Surfaces: A Comparative Study." Drones 7, no. 2 (2023): 98. http://dx.doi.org/10.3390/drones7020098.

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Unmanned aerial vehicles (UAVs) and reconfigurable intelligent surfaces (RIS) are the promising emerging technologies proposed for the 6th-Generation (6G) network to improve the capacity, reliability, and coverage of wireless communications. By integrating the UAV with RIS (RIS-UAV), the three-dimensional (3D) mobility of the UAV can be leveraged to establish strong line-of-sight links with the ground nodes, while the RIS intelligently reflect the signals toward the desired directions. However, the existing literature on RIS-UAV systems mainly assumes the use of passive elements, which suffers

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Gorodetskiy, A., and M. Grabovskiy. "Technological qualities of root crops and economic efficiency of growing sugar beet hybrids by the KWS company in the conditions of "Rasavske" Ltd. of Kaharlyk district, Kiev region." Agrobìologìâ, no. 2(142) (December 22, 2018): 34–39. http://dx.doi.org/10.33245/2310-9270-2018-142-2-34-39.

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The paper deals with the results of research on the study of the technological traits changes in foreign hybrids root crops of the KWS company sugar beet enterprises under the influence of long-term storage and their economic efficiency. The conducted researches are especially relevant due to insufficiently studied issues of changes in the technological traits of the root crops of the newest hybrids during their storage in the crutches on the field or at the sugar factory. Estimation of new hybrids of sugar beet by regions of the Forest-steppe allows to predict the genetically determined degre

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Jordan, David. "Assessment of Corn (Zea mays) Emergence using High-Resolution Spatial UAV-Based Remote Sensing." Archives of Agriculture Research and Technology (AART) 6, no. 1 (2025): 1–3. https://doi.org/10.54026/aart/1079.

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Timing and uniformity of seedling emergence can affect corn growth and development through interplant competition. Assessing uniformity of emergence can be time consuming when done visually by researchers. Research was conducted to compare accuracy of a UAV platform used to estimate corn stand within the first five days of emergence compared with hand counting emerged seedlings. Analysis of UAV-derived estimates of emergence fit a linear regression model for seedlings emerging one (R = 0.45) and two (R = 0.75) days after the first seedlings were observed in a trial with multiple corn hybrids a

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Xia, Chuying, Xin Fu, and Shijie Zhai. "Research on power configuration scheme of parallel hybrid oil-electric power system for tilt- rotor UAV." Journal of Physics: Conference Series 2478, no. 10 (2023): 102028. http://dx.doi.org/10.1088/1742-6596/2478/10/102028.

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Abstract The tilt-rotor UAV is a new type of unmanned aerial vehicle that has both the hovering capability of a rotary-wing UAV and the high-speed cruising flight capability of a fixed- wing UAV. Through the tilting system of the UAV, different working states can be switched: during the take-off and landing phases, the rotor axis is perpendicular to the ground, thus realizing aerial hovering, forward and backward flight and side flight. In the cruise flight phase, the rotor axis is perpendicular to the flight direction, thus achieving the flight attitude of a fixed-wing aircraft. The hybrid po

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Radócz, László, Atala Szabó, András Tamás, et al. "Investigation of the Detectability of Corn Smut Fungus (Ustilago maydis DC. Corda) Infection Based on UAV Multispectral Technology." Agronomy 13, no. 6 (2023): 1499. http://dx.doi.org/10.3390/agronomy13061499.

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Corn smut fungus (Ustilago maydis [DC.] Corda) is a globally widespread pathogen affecting both forage and sweet maize hybrids, with higher significance in sweet maize. Remote sensing technologies demonstrated favorable results for disease monitoring on the field scale. The study focused on the changes in vegetation index (VI) values influenced by the pathogen. In this study, four hybrids, two forage maize and two sweet maize hybrids were examined. Artificial infection was carried out at three different doses: a low (2500 sporidium number/mL), medium (5000 sporidium number/mL) and high dose (1

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Tomashuk, O. "Economic efficiency of growing corn hybrids for grain by different soil tillage technologies." Feeds and Feed Production, no. 87 (June 7, 2019): 144–50. http://dx.doi.org/10.31073/kormovyrobnytstvo201987-22.

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The article presents indicators of the economic efficiency of various technologies for growing corn hybrids for grain. The results of a 3-year field trial in maize of various maturity groups grown in the right-bank Forest-Steppe under different soil tillage models are highlighted. The costs of corn grain production under conventional cultivation and deep tillage, which averages 10,330 UAH per hectare of cropping area is studied. The rate of expenditures clearly correlated with the rate of hybrid productivity. High net profit of 20,119 UAH per hectare is shown when planting mid-ripening hybrid

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Farid Danial Norazman, Ahmad Hamdan Ariffin, Mohd Rahmat Firman Sahifulddin, and Irfan Abdul Rahim. "Investigation of Empennage Location Effect to the Unmanned Aerial Vehicle (UAV) Structure Characteristic." Journal of Advanced Research in Applied Mechanics 113, no. 1 (2024): 1–12. http://dx.doi.org/10.37934/aram.113.1.112.

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Over the past few decades, unmanned aerial vehicles, commonly known as UAVs, have been widely used in a number of consumer and military applications, such as surveillance, tracking, monitoring, and aerial photography. Fixed-wing and rotary UAVs are the two primary categories in UAV. Interestingly, the hybridization of fixed-wing and rotary UAV gives better performance in terms of energy consumption and the needs of runaway. Designing new hybrid fixed wing-rotary UAV or hybrid vertical take-off and landing (VTOL) is challenging especially to identify the critical location in the UAV and materia

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Shen, Xueqiang, Jiwei Fan, and Haiqing Wang. "Design and Simulation of Eight-Rotor Unmanned Aerial Vehicle Based on Hybrid Control System." International Journal of Aerospace Engineering 2018 (December 5, 2018): 1–10. http://dx.doi.org/10.1155/2018/5306125.

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In order to control the position and attitude of unmanned aerial vehicle (UAV) better in different environments, this study proposed a hybrid control system with backstepping and PID method for eight-rotor UAV in different flight conditions and designed a switching method based on altitude and attitude angle of UAV. The switched process of hybrid controller while UAV taking off, landing, and disturbance under the gust is verified in MATLAB/Simulink. A set of appropriate controllers always matches to the flight of UAV in different circumstances, which can speed up the system response and reduce

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Moisiienko, Vira, and Vasyl Bezkorovainyi. "ECONOMIC EVALUATION OF ELEMENTS OF WINTER RAPE CULTIVATION TECHNOLOGY IN THE CONDITIONS OF RIGHT-BANK FOREST-STEPPE." Agriculture and Forestry, no. 4 (35) (December 24, 2024): 17–28. https://doi.org/10.37128/2707-5826-2024-4-2.

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In the global agricultural market, winter rapeseed (Brassica napus L.) retains its leading position as a valuable and profitable oilseed crop with wide food, fodder, technical and bioenergy use. The article presents the results of scientific research conducted during 2022–2024 on typical black soil in the Forest-Steppe zone of the Right-Bank Ukraine with winter rape. The yield of three mid-season hybrids of winter rape was determined, which influenced the indicators of economic efficiency of crop cultivation. The results indicate a high economic evaluation of winter rape hybrids - InVigor 1030

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Li, Boya, Chenxi Wu, Jian Ding, and Difeng Zhu. "A rapid unmanned aerial vehicle inspection path planning method based on hybrid heuristic algorithm." E3S Web of Conferences 522 (2024): 01014. http://dx.doi.org/10.1051/e3sconf/202452201014.

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The advancement of unmanned aerial vehicle (UAV) and remote sensing technologies has fueled interest in automatic UAV inspection path planning based on inspection tasks. However, traditional methods suffer from limitations such as manual operation, inability to find optimized paths, and lengthy time consumption. We propose a rapid UAV inspection path planning method using a hybrid heuristic algorithm in this paper. First, real-world data is abstracted into a graph. Then, a hybrid heuristic algorithm is proposed and used to determine an optimal inspection path considering the tasks and power pa

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Bai, Mingliang, Wenjiang Yang, Dongbin Song, et al. "Research on Energy Management of Hybrid Unmanned Aerial Vehicles to Improve Energy-Saving and Emission Reduction Performance." International Journal of Environmental Research and Public Health 17, no. 8 (2020): 2917. http://dx.doi.org/10.3390/ijerph17082917.

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The rapid development of industry results in large energy consumption and a negative impact on the environment. Pollution of the environment caused by conventional energy sources such as petrol leads to increased demand for propulsion systems with higher efficiency and capable of energy-saving and emission reduction. The usage of hybrid technology is expected to improve energy conversion efficiency, reduce energy consumption and environmental pollution. In this paper, the simulation platform for the hybrid unmanned aerial vehicle (UAV) has been built by establishing the subsystem models of the

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Xuefeng Chen, Xuefeng Chen, Wan Tang Xuefeng Chen, Ximin Yang Wan Tang, Lingyun Zhou Ximin Yang, and Liuhuan Li Lingyun Zhou. "PSO-VFA: A Hybrid Intelligent Algorithm for Coverage Optimization of UAV-Mounted Base Stations." 網際網路技術學刊 23, no. 3 (2022): 487–95. http://dx.doi.org/10.53106/160792642022052303007.

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<p>When the number of outdoor wireless users surges and fixed base stations (BSs) can hardly accommodate high-load communication traffic, unmanned aerial vehicles (UAVs) carrying BSs can provide wireless communication services, and the location deployment of the UAV-mounted BSs directly influences the reliability of network communications. For the target area scenario where the UAVs uniformly cover user nodes, we propose a hybrid intelligent coverage algorithm called PSO-VFA to optimize the coverage of a fixed number of UAV-BSs. The PSO-VFA algorithm consists of two phases employing diff

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Krishnakumar, R., K. Senthil Kumar, and T. Anand. "Design and Development of Vertical Takeoff and Horizontal Transition Mini Unmanned Aerial Vehicle." Advanced Materials Research 1016 (August 2014): 436–40. http://dx.doi.org/10.4028/www.scientific.net/amr.1016.436.

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In recent years Unmanned Aerial Vehicles (UAV) has become a significant segment of the aviation industry. They can be chosen to be designed as fixed wing or Rotary wing type. Fixed-wing aircraft has the performance of fast forward movement, long range and superior endurance due to its gliding capabilities with no power. Unlike the fixed wing models, rotary wing mini-copters are able to fly in all directions, hover in a fixed position with minimal space for takeoff and landing. This makes them the perfect instrument for detailed inspection work or surveying. Implementing a hybrid UAV has the ad

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Jianzhi, DENG, SONG Wenyan, YANG Guangjun, JIANG Feng, and XIONG Neng. "Aircraft/Engine Integrated Design for an Air-superiority Unmanned Aerial Vehicle." Journal of Physics: Conference Series 2235, no. 1 (2022): 012060. http://dx.doi.org/10.1088/1742-6596/2235/1/012060.

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Abstract Aiming at the demand of efficient energy management for wide flight envelope of air-superiority unmanned aerial vehicle (UAV), an conceptual and preliminary design of air-superiority UAV with oil-electric hybrid power was proposed based on the idea of integrated aircraft and engine modelling. The evaluation model of the UAV aerodynamic performance and the thrust requirements of full flight envelope were determined, then the matching configuration of target turbofan engine was proposed. According to general design parameters of UAV, the simulation model and constraint relations for air

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Pierucci, Laura. "Hybrid Direction of Arrival Precoding for Multiple Unmanned Aerial Vehicles Aided Non-Orthogonal Multiple Access in 6G Networks." Applied Sciences 12, no. 2 (2022): 895. http://dx.doi.org/10.3390/app12020895.

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Unmanned aerial vehicles (UAV) have attracted increasing attention in acting as a relay for effectively improving the coverage and data rate of wireless systems, and according to this vision, they will be integrated in the future sixth generation (6G) cellular network. Non-orthogonal multiple access (NOMA) and mmWave band are planned to support ubiquitous connectivity towards a massive number of users in the 6G and Internet of Things (IOT) contexts. Unfortunately, the wireless terrestrial link between the end-users and the base station (BS) can suffer severe blockage conditions. Instead, UAV r

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Wu, H., Z. Wang, B. Ren, et al. "DESIGN AND EXPERIMENT OF A HIGH PAYLOAD FIXED WING VTOL UAV SYSTEM FOR EMERGENCY RESPONSE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B3-2020 (August 22, 2020): 1715–22. http://dx.doi.org/10.5194/isprs-archives-xliii-b3-2020-1715-2020.

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Abstract. With the development of UAV technologies, the advantages of hybrid VTOL UAV have been realized and taken in emergency response. But, former hybrid VTOL UAV is lack of capacities on payload and endurance, which restrict the integration of multiple sensors. In this paper, a high payload fixed wing VTOL UAV, which has 20 kg payload and more than 3 hours endurance, is used to design a UAV system for emergency response. Multiple sensors including an optronics pod, PhaseOne IXM-100 camera, high accuracy inertial navigation system and three-axis stable head are integrated with it. Based on

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Ali, Zain Anwar, and Han Zhangang. "Multi-unmanned aerial vehicle swarm formation control using hybrid strategy." Transactions of the Institute of Measurement and Control 43, no. 12 (2021): 2689–701. http://dx.doi.org/10.1177/01423312211003807.

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This study proposes a novel hybrid strategy for formation control of a swarm of multiple unmanned aerial vehicles (UAVs). To enhance the fitness function of the formation, this research offers a three-dimensional formation control for a swarm using particle swarm optimization (PSO) with Cauchy mutant (CM) operators. We use CM operators to enhance the PSO algorithm by examining the varying fitness levels of the local and global optimal solutions for UAV formation control. We establish the terrain and the fixed-wing UAV model. Furthermore, it also models different control parameters of the UAV a

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Diem, P. G., P. H. Anh, Phu Khanh Nguyen, N. P. Hung, and N. V. Hien. "A Hybrid Control Model to Develop the Trajectory-Tracking Controller for a Quadrotor UAV." Advanced Materials Research 1016 (August 2014): 678–85. http://dx.doi.org/10.4028/www.scientific.net/amr.1016.678.

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A new hybrid model of control implementation is developed to realize trajectory-tracking controllers for quadrotor Unmanned Aerial Vehicles (UAV). This model is based on the Computational Fluid Dynamics (CFD) model and hybrid automata in order to accurately implement control parts of these vehicles, and can be applied to most standard quadrotor UAV platforms. The paper brings out step-by-step the controller development lifecycle for a quadrotor UAV, including the configuration and aerodynamic calculation model for the gathering preliminary inputs of the control application, the control analysi

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Papadopoulos, C., S. Vlachos, and K. Yakinthos. "Conceptual design of a fixed wing hybrid UAV UUV platform." IOP Conference Series: Materials Science and Engineering 1226, no. 1 (2022): 012028. http://dx.doi.org/10.1088/1757-899x/1226/1/012028.

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Abstract In this work, the conceptual design methodology of a hybrid Unmanned Aerial Vehicle (UAV) – Unmanned Underwater Vehicle (UUV) platform is presented. As the mission complexity and the need for interoperability between different platforms grows more demanding by the day, hybrid platforms are becoming an essential solution. Hybrid UAV-UUVs can operate seamlessly and repeatedly in both the aerial and underwater environments, something that numerous animal species already execute in an optimized way. The design methodology starts with the review of the few available prototypes, creating in

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Chai, Xiyuan, Xin Fu, and Shijie Zhai. "Research on the Working Performance of UAV Hybrid Power System Based on Mission Profile." Journal of Physics: Conference Series 2478, no. 10 (2023): 102029. http://dx.doi.org/10.1088/1742-6596/2478/10/102029.

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Abstract Currently, UAVs can be divided into two main types based on the type of power unit, fuel-powered UAVs and electrically powered UAVs. Most drones that are generally smaller and lighter in weight are electrically powered; while larger drones are usually fuel-powered. Both have their advantages and disadvantages, with fuel-powered drones being highly polluting and noisy, while electric drones usually have a shorter range. Fuel-powered UAVs are noisy and polluting, while electrically powered UAVs are usually shorter. The hybrid system combines the advantages of both and reduces pollution

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Wang, Bohang, and Daobo Wang. "Robust Hybrid Control Algorithm for Tuning the Altitude and Attitude of Unmanned Aerial Vehicle." Journal of Robotics 2020 (January 25, 2020): 1–8. http://dx.doi.org/10.1155/2020/2368273.

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In this article, a new and novel robust hybrid control algorithm is designed for tuning the parameters of unmanned aerial vehicle (UAV). The quadrotor type UAV mathematical model is taken to observe the effectiveness of our designed robust hybrid control algorithm. The robust hybrid control algorithm consists of H∞ based regulation, pole-placement and tracking (RST) controller along with mixed sensitivity function is applied to control the complete model of UAV. The selected rotor craft is under-actuated, nonlinear and multivariable behavior in nature along with six degrees of freedom (DOF). D

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Ullah, Saif, Khalid Hussain Mohammadani, Muhammad Asghar Khan, et al. "Position-Monitoring-Based Hybrid Routing Protocol for 3D UAV-Based Networks." Drones 6, no. 11 (2022): 327. http://dx.doi.org/10.3390/drones6110327.

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Unmanned aerial vehicles (UAV) have emerged as prime technologies due to their compatible size and flexible architecture. UAV technology offers services in vast application such as inter-UAV communication, wireless sensors, and the future Internet of Things (IoT) due to its compatible architecture. A UAV’s speed varies while roaming, which may increase the risk of a connection failure. Various routing schemes have provided solutions to address this essential issue for three-dimensional (3D) UAV-based networks. The main category of UAV routing schemes is position-based routing schemes, which ch

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Salas-Marco, Joe, Hua Fan-Minogue, Adam K. Kallmeyer, Lawrence A. Klobutcher, Philip J. Farabaugh, and David M. Bedwell. "Distinct Paths To Stop Codon Reassignment by the Variant-Code Organisms Tetrahymena and Euplotes." Molecular and Cellular Biology 26, no. 2 (2006): 438–47. http://dx.doi.org/10.1128/mcb.26.2.438-447.2006.

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ABSTRACT The reassignment of stop codons is common among many ciliate species. For example, Tetrahymena species recognize only UGA as a stop codon, while Euplotes species recognize only UAA and UAG as stop codons. Recent studies have shown that domain 1 of the translation termination factor eRF1 mediates stop codon recognition. While it is commonly assumed that changes in domain 1 of ciliate eRF1s are responsible for altered stop codon recognition, this has never been demonstrated in vivo. To carry out such an analysis, we made hybrid proteins that contained eRF1 domain 1 from either Tetrahyme

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Johnson, R. T., S. Squires, G. C. Elliott, G. L. Koch, and A. J. Rainbow. "Xeroderma pigmentosum D-HeLa hybrids with low and high ultraviolet sensitivity associated with normal and diminished DNA repair ability, respectively." Journal of Cell Science 76, no. 1 (1985): 115–33. http://dx.doi.org/10.1242/jcs.76.1.115.

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Fusion between HeLa and fibroblasts from complementation group D xeroderma pigmentosum (XPD) followed by challenge with small doses of ultraviolet light (u.v.) results in the production of hybrid cells expressing either HeLa (HD1) or XPD-like (HD2) sensitivity to u.v. and related repair capacity. Assays used included unscheduled DNA synthesis (UDS), DNA break accumulation in the presence of inhibitors of DNA repair synthesis and host cell reactivation of irradiated adenovirus. Complementation assay in heterokaryons reveals limited ability of HD2 to restore UDS in XPD nuclei. We believe this co

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Konyalıoğlu, Turan, Sinan Alnıpak, Halil İbrahim Şahin, and Erdinç Altuğ. "Integrating Additive Manufacturing and Composite Manufacturing Techniques to Build a General-Purpose UAV." International Journal of Aviation Science and Technology vm06, is02 (2025): 91–105. https://doi.org/10.23890/ijast.vm06is02.0203.

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The development of unmanned aerial vehicles (UAVs) and their integration into our daily life have rapidly accelerated in recent years. Despite these advancements, the production of UAVs often requires specialized and costly equipment. However, with the rapid evolution of additive manufacturing (AM) technologies, it is now possible to design lightweight, optimized structures that can be manufactured easily and quickly. This approach enables faster design iterations, reduces the need for multiple parts and material usage during production, and significantly minimizes waste. A hybrid UAV combines

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AbdElHamid, Amr, Peng Zong, and Bassant Abdelhamid. "Advanced UAV Hybrid Simulator Model Based-on Dynamic Real Weather Data." International Journal of Modeling and Optimization 5, no. 4 (2015): 246–56. http://dx.doi.org/10.7763/ijmo.2015.v5.470.

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Wang, Xiaodong, Yangming Guo, Nan Lu, and Pei He. "UAV Cluster Behavior Modeling Based on Spatial-Temporal Hybrid Petri Net." Applied Sciences 13, no. 2 (2023): 762. http://dx.doi.org/10.3390/app13020762.

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Currently, we are facing an increasing trend in the use of unmanned aerial vehicles (UAV) in various activities, both civilian and military. The application of UAVs in the battlefield has received extensive attention amid a global new military revolution. A UAV cluster is a large and complex real-time feedback system that integrates a communication and sensor network, control system, calculation, and physical process. The heterogeneous UAVs conduct complex behaviors, which requires a comprehensive description and analysis of UAV cluster modeling. The integrated modeling of the heterogeneous UA

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Alam, Mir Md Tasnim, Anita Simic Milas, Mateo Gašparović, and Henry Poku Osei. "Retrieval of Crop Canopy Chlorophyll: Machine Learning vs. Radiative Transfer Model." Remote Sensing 16, no. 12 (2024): 2058. http://dx.doi.org/10.3390/rs16122058.

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In recent years, the utilization of machine learning algorithms and advancements in unmanned aerial vehicle (UAV) technology have caused significant shifts in remote sensing practices. In particular, the integration of machine learning with physical models and their application in UAV–satellite data fusion have emerged as two prominent approaches for the estimation of vegetation biochemistry. This study evaluates the performance of five machine learning regression algorithms (MLRAs) for the mapping of crop canopy chlorophyll at the Kellogg Biological Station (KBS) in Michigan, USA, across thre

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Jung, Sunghun. "Development and Verification of Hybrid Power Controller Using Indoor HIL Test for the Solar UAV." Energies 13, no. 8 (2020): 2110. http://dx.doi.org/10.3390/en13082110.

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A hybrid power system (HPS) is developed for the photovoltaic (PV) powered and tethered multirotor unmanned aerial vehicle (UAV) based on the robot operating system (ROS) and verified using an indoor hardware-in-the-loop (HIL) test. All the processes, including a UAV flight mode change (i.e., takeoff, hovering, and landing) and power flow control (consisting of PV modules, a LiPo battery pack, and a UAV) are completely automated using a combination of Pixhawk 2.1 and the Raspberry Pi 3 Model B (RPi 3B). Once the indoor HIL test starts, (1) the UAV takes off and hovers with a preassigned 10 m a

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Zhao, Zhiheng, Weijie Chen, and Cheng Yang. "An efficient hybrid aeroacoustic method to predict the noise of a ducted coaxial-rotor UAV." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 7 (2023): 1443–48. http://dx.doi.org/10.3397/in_2023_0216.

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Ducted coaxial-rotor UAV is a new concept UAV configuration. Compared with the traditional open rotor UAV, it has the advantages of higher safety, lower noise and smaller size, especially suitable for compact space and low noise scene applications. However, the complexity of the internal flow field caused by the presence of the duct makes it difficult to obtain accurate acoustic results by using the conventional aeroacoustic simulation methods. Based on the theory of duct acoustics and the theory of propeller noise, this paper presents an efficient calculation method of aeroacoustic source sui

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ASWINI, KUMAR PATRA, and PATEL KANDARP. "DESIGN AND DEVELOPMENT OF TRANSITION AUTOPILOT FOR VTOL UAV." IJIERT - International Journal of Innovations in Engineering Research and Technology 4, no. 7 (2017): 57–72. https://doi.org/10.5281/zenodo.1459069.

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<strong>UAV becomes versatile in nature in terms of application and its compact operation. UAV has its own limits by its design nature. Fixed wing vehicles have high endurance and range where as multi - copter have hovering and various terrain operation. This briefs attempts to blend the combination of both fixed - wing and multi - copter and develops autonomous for transition. The conceptual design made with 1kg payload,1km range,and 16 minute endurance with VTOL capability. The airframe is selected based on the requirements. The propulsion system designed such a way to adopt hover as well as

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Ali, Zain Anwar, Daobo Wang, Suhaib Masroor, and M. Shafiq Loya. "Attitude and Altitude Control of Trirotor UAV by Using Adaptive Hybrid Controller." Journal of Control Science and Engineering 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/6459891.

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The paper presents an adaptive hybrid scheme which is based on fuzzy regulation, pole-placement, and tracking (RST) control algorithm for controlling the attitude and altitude of trirotor UAV. The dynamic and kinematic model of Unmanned Aerial Vehicle (UAV) is unstable and nonlinear in nature with 6 degrees of freedom (DOF); that is why the stabilization of aerial vehicle is a difficult task. To stabilize the nonlinear behavior of our UAV, an adaptive hybrid controller algorithm is used, in which RST controller tuning is performed by adaptive gains of fuzzy logic controller. Simulated results

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Sun, Chao, and Zhihua Li. "Multi-UAV-Assisted MEC Offloading-Optimization Method on Deep Reinforcement Learning." International Journal on Semantic Web and Information Systems 21, no. 1 (2025): 1–31. https://doi.org/10.4018/ijswis.368839.

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In multi-UAV-assisted mobile edge computing (MEC), insufficient consideration of collaborative computation in inter-UAV communication can significantly reduce computational service capabilities. For this problem, we present a multi-UAV-assisted MEC offloading optimization model that jointly optimizes task offloading decision, UAV resource allocation, UAV trajectories and establish collaborative computation through inter-UAV communication. First, to solve the multi-UAV-assisted MEC offloading optimization issue, we define a weighted utility function that balances delay and energy consumption. T

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LU, Nan, Xiaodong WANG, Zheng TANG, and Pei HE. "Modeling method of unmanned aerial vehicle swarm behavior based on spatiotemporal hybrid Petri net." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 40, no. 4 (2022): 812–18. http://dx.doi.org/10.1051/jnwpu/20224040812.

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The more and more widely used UAV swarm operations have received great attention in the new global military revolution of informatization, and the integrated modeling of UAV swarms has great significance and value for the testing and verification of combat modes. Aiming at the modeling and simulation requirements of combat scenarios, taking the collaborative combat process of heterogeneous UAV swarms as the research object, starting from the modeling of a single UAV, on the basis of the formalization and mathematical description of the single combat process, this paper employs Petri nets based

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Wang, Yi, and Ensheng Liu. "Virtual Reality Technology of Multi UAVEarthquake Disaster Path Optimization." Mathematical Problems in Engineering 2021 (March 10, 2021): 1–9. http://dx.doi.org/10.1155/2021/5525560.

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China is a country with frequent earthquake disasters. After the occurrence of earthquake disasters, the key to disaster monitoring and rescue is to quickly obtain images of postdisaster areas. Unmanned aerial vehicle (UAV) path planning is the core of multi-UAV cooperative control. With the increasing popularity of UAVs, people with more complex living environments contact with UAVs more frequently, which also poses a challenge to the overall control of UAVs, making single UAV and even multi-UAV cooperative path planning become a hot research issue in recent years. The complexity of communica

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Wang, Yinyin, Lokeshkumar Kumar, Vijayanandh Raja, et al. "Design and Innovative Integrated Engineering Approaches Based Investigation of Hybrid Renewable Energized Drone for Long Endurance Applications." Sustainability 14, no. 23 (2022): 16173. http://dx.doi.org/10.3390/su142316173.

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At present, surveillance is attracting attention in the field of UAV development. In particular, border surveillance plays a vital role in obtaining the required data around the border and for assisting in military operations. The primary function of this Hybrid UAV (VTOL and Fixed Wing) is to provide prerequisite data, captured during day/night surveillance, to the respective database. One of the primary problems that arise in border patrolling is the use of the UAV under different environmental conditions, thereby reducing its endurance firmly. In addition to the surveillance equipment, ener

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Long, Le, Jinlong Lin, Muhua Liu, et al. "Experimental Study on UAV-Assisted Pollination in Hybrid Rice." Drones 9, no. 5 (2025): 327. https://doi.org/10.3390/drones9050327.

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To address challenges in hybrid rice seed production—specifically labor dependence, low uniformity of pollen distribution, and low operational efficiency—which collectively drive up large-scale production costs, technological innovations are critical. However, despite the demonstrated potential of UAV-assisted pollination, the quantitative relationships between its operational parameters (altitude, speed, flight patterns) and pollen dispersal dynamics remain poorly understood, impeding standardization efforts. In this study, guided by agronomic pollination requirements, we developed an integra

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Kim, Minsu, Minji Kim, Yukai Chen, Jaemin Kim, and Donkyu Baek. "Hybrid DNN-Based Flight Power Estimation Framework for Unmanned Aerial Vehicles." Drones 9, no. 2 (2025): 104. https://doi.org/10.3390/drones9020104.

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Unmanned Aerial Vehicles (UAVs) have been widely used in logistics and communication, though they were initially used for military purposes. However, because the motor must always be rotated, the flight range of an UAV is limited, which, in turn, restricts the scope of UAV applications. Of course, if UAV power consumption is predicted using AI, it is possible to effectively plan UAV operations by deriving optimal energy-efficient flight paths during the simulation phase. However, when using deep neural networks (DNNs) to build a UAV power consumption model, it is difficult to make accurate inf

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Lu, Conghui, and Peng Chen. "Robust Channel Estimation Scheme for Multi-UAV MmWave MIMO Communication with Jittering." Electronics 12, no. 9 (2023): 2102. http://dx.doi.org/10.3390/electronics12092102.

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In unmanned aerial vehicle (UAV)-assisted millimeter-wave (mmWave) communications, the communication performance is significantly degraded by UAV jitter. We formulate a UAV-assisted mmWave channel model with hybrid beamforming for the impacts of UAV jitter. Then, we derive the distribution of angle of arrivals/departures (AOAs/AODs) with random fluctuation of the UAV attitude angle. We develop an iterative reweight-based robust scheme as the super-resolution AOAs/AODs estimation method. Specifically, we introduce the partially adaptive momentum (Padam) estimation method to optimize the objecti

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Alsadik, Bashar, Fabio Remondino, and Francesco Nex. "Simulating a Hybrid Acquisition System for UAV Platforms." Drones 6, no. 11 (2022): 314. http://dx.doi.org/10.3390/drones6110314.

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Currently, there is a rapid trend in the production of airborne sensors consisting of multi-view cameras or hybrid sensors, i.e., a LiDAR scanner coupled with one or multiple cameras to enrich the data acquisition in terms of colors, texture, completeness of coverage, accuracy, etc. However, the current UAV hybrid systems are mainly equipped with a single camera that will not be sufficient to view the facades of buildings or other complex objects without having double flight paths with a defined oblique angle. This entails extensive flight planning, acquisition duration, extra costs, and data

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Zheng, Yeqiang, An Li, Yihu Wen, and Gaocai Wang. "A UAV Trajectory Optimization and Task Offloading Strategy Based on Hybrid Metaheuristic Algorithm in Mobile Edge Computing." Future Internet 17, no. 7 (2025): 300. https://doi.org/10.3390/fi17070300.

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In the UAV-assisted mobile edge computing (MEC) communication system, the UAV receives the data offloaded by multiple ground user devices as an aerial base station. Among them, due to the limited battery storage of a UAV, energy saving is a key issue in a UAV-assisted MEC system. However, for a low-altitude flying UAV, successful obstacle avoidance is also very necessary. This paper aims to maximize the system energy efficiency (defined as the ratio of the total amount of offloaded data to the energy consumption of the UAV) to meet the maneuverability and three-dimensional obstacle avoidance c

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Lu, Ning, Yongzai Xi, Hongshan Zheng, et al. "Development of a Hybrid Fixed-Wing UAV Aeromagnetic Survey System and an Application Study in Chating Deposit." Minerals 13, no. 8 (2023): 1094. http://dx.doi.org/10.3390/min13081094.

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In recent years, the development of airborne magnetic survey technology based on unmanned aerial vehicles (UAVs) has been rapidly advancing. The commonly used systems are the fixed-wing UAV-based, multi-rotors UAV-based, and unmanned helicopters-based magnetic survey systems. And, a type of hybrid UAV that uses a vertical takeoff and landing (VTOL) and fixed-wing cruise mode is increasingly being used to carry airborne magnetic survey systems. To meet the requirements of most UAVs for small-sized and lightweight payloads, a miniature magnetic survey system was developed and integrated into a h

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Zheng, Chen. "Exploration on the Reform of UAV Technology Talent Training Mode under the Background of Emerging Engineering Education." International Journal of Education and Humanities 19, no. 3 (2025): 80–84. https://doi.org/10.54097/aashnm87.

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Hybrid teaching represents a crucial innovative pathway in the field of higher engineering education to address global digital challenges. Within the framework of emerging engineering talent cultivation, the deep integration of hybrid teaching and curriculum ideology and politics can fully integrate the cutting-edge nature of online resources with the practicality of offline teaching, thereby enhancing the cultivation quality of applied talents in the UAV technology field. As a core course for cultivating UAV engineering talents, "Multi-rotor UAV Technology and Control" aims at the pain points

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Giernacki, Wojciech, Sławomir Stępień, Marcin Chodnicki, and Agnieszka Wróblewska. "Hybrid Quasi-Optimal PID-SDRE Quadrotor Control." Energies 15, no. 12 (2022): 4312. http://dx.doi.org/10.3390/en15124312.

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In the paper, a new cascade control system for an autonomous flight of an unmanned aerial vehicle (UAV) based on Proportional–Integral–Derivative (PID) and finite-time State-Dependent Riccati Equation (SDRE) control is proposed. The PID and SDRE controllers are used in a hybrid control system for precise control and stabilization, which is necessary to increase the drone’s flight stability and maneuver precision. The hybrid PID-SDRE control system proposed for the quadrotor model is quasi-optimal, since the suboptimal control algorithm for the UAV stabilization is used. The combination of the

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Anuar, Kaspul, Warman Fatra, and Anita Susilawati. "PEMANFAATAN LIMBAH TANDAN KOSONG SAWIT (TKS) SEBAGAI MATERIAL ALTERNATIF DALAM PEMBUATAN BADAN WAHANA TERBANG TIPE FIXED WING ATHA MAPPER 2150." Jurnal Rekayasa Mesin 13, no. 2 (2022): 609–17. http://dx.doi.org/10.21776/jrm.v13i2.1161.

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To improve the application and use value of Palm Oil Empty Fruit Bunch (OPEFB) waste as a composite material, the research team conducted research related to the utilization OPEFB fiber as an alternative material to replace carbon fiber in the manufacture of fuselage of Unmaned Aerial Vehicle (UAV). The low price of OPEFB, low of specific density and it’s abundant availability are the basis of research to apply it’s fiber as material of UAV fuselage. This research begins with the processing of OPEFB into fiber through an alkali treatment process. Furthermore, the process of maleated natural ru

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De Wagter, C., B. Remes, E. Smeur, et al. "The NederDrone: A hybrid lift, hybrid energy hydrogen UAV." International Journal of Hydrogen Energy 46, no. 29 (2021): 16003–18. http://dx.doi.org/10.1016/j.ijhydene.2021.02.053.

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