scholarly journals Method for analyzing the stability of information transfer between unmanned aerial vehicles in the formation

2020 ◽  
Vol 11 (30) ◽  
pp. 125-136
Author(s):  
G. S. Vasilyev ◽  
O. R. Kuzichkin ◽  
I. A. Kurilov ◽  
D. I. Surzhik
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Information Exchange ◽  
Information Transfer ◽  
Transfer Functions ◽  
High Order ◽  
Piecewise Linear Approximation ◽  
Aerial Vehicles ◽  
Wide Range ◽  
Significant Difference ◽  
The Stability

The use of a formation consisting of adaptive autonomous mobile agents allows solving a wide range of tasks that are often beyond the capabilities of individual agents. A multi-agent formation is a complex high-order dynamic system, so analyzing the stability of such a system is a complex task. At present, the problem of estimating the stability of a formation formed by substantially nonlinear high-order agents with variable dynamic parameters is not sufficiently considered. This task is particularly important for a formation that is affected by complex unstable environmental conditions, in particular for the formation of unmanned aerial vehicles (UAVs). A method for analyzing the stability of formations of nonlinear agents with different types and orders of transfer function has been developed for studying information exchange in UAV networks. The new approach is based on the use of the Popov frequency criterion and the piecewise linear approximation of the hodograph. A computational experiment was performed to analyze the stability of a formation with transfer functions of various types and orders from the 1st to the 10th. The conducted studies revealed a significant difference in the calculated boundary coefficients of formation stability in the linear and nonlinear modes, which confirms the need to analyze the nonlinear stability under the influence of strong destabilizing influences on the formation.

scholarly journals Internet of Unmanned Aerial Vehicles—A Multilayer Low-Altitude Airspace Model for Distributed UAV Traffic Management

Sensors ◽  
2019 ◽  
Vol 19 (21) ◽  
pp. 4779 ◽  
Author(s):  
Nader S. Labib ◽  
Grégoire Danoy ◽  
Jedrzej Musial ◽  
Matthias R. Brust ◽  
Pascal Bouvry
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Traffic Management ◽  
Complex Problem ◽  
Experimental Simulation ◽  
Aerial Vehicles ◽  
Safe Management ◽  
Wide Range ◽  
Abstract Level ◽  
Low Altitude ◽  
New Research

The rapid adoption of Internet of Things (IoT) has encouraged the integration of new connected devices such as Unmanned Aerial Vehicles (UAVs) to the ubiquitous network. UAVs promise a pragmatic solution to the limitations of existing terrestrial IoT infrastructure as well as bring new means of delivering IoT services through a wide range of applications. Owning to their potential, UAVs are expected to soon dominate the low-altitude airspace over populated cities. This introduces new research challenges such as the safe management of UAVs operation under high traffic demands. This paper proposes a novel way of structuring the uncontrolled, low-altitude airspace, with the aim of addressing the complex problem of UAV traffic management at an abstract level. The work, hence, introduces a model of the airspace as a weighted multilayer network of nodes and airways and presents a set of experimental simulation results using three UAV traffic management heuristics.

US armed UAV precedent will hinder global rules-making

2016 ◽  
Keyword(s):  
United States ◽  
Unmanned Aerial Vehicles ◽  
Policy Reform ◽  
The United States ◽  
Barack Obama ◽  
International Norms ◽  
Content Type ◽  
Intelligence Sharing ◽  
Aerial Vehicles ◽  
Wide Range

Subject Post-Obama armed UAV policy. Significance As President Barack Obama prepares to leave office in January 2017, his administration has called for the United States to lead development of a set of international norms to govern the use of armed UAVs ('unmanned aerial vehicles' or 'drones'). The international proliferation and military use of armed UAVs by nations outside the circle of trusted US allies have highlighted the urgency of formulating clearly articulated international rules to govern an otherwise vaguely defined arena of international behaviour dominated by US precedent. Impacts Congressional aversion to supporting ground interventions abroad will enable the next president further to delay UAV policy reform. A wide range of countries frustrated with restrictions from Washington may turn to China as a key supplier of armed UAVs. Failed US efforts to reform the covert drone programme may complicate intelligence-sharing with European allies.

scholarly journals Analysis of the military application of unmanned aircraft and main direction for their development

2021 ◽  
Vol 33 ◽  
pp. 237-250
Author(s):  
Nikolay Zagorski
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Unmanned Aircraft ◽  
Armed Struggle ◽  
Military Application ◽  
Aerial Vehicles ◽  
Wide Range ◽  
Military Conflicts ◽  
Range Of Functions ◽  
The Military ◽  
Further Development

Modern military unmanned aerial vehicles (UAVs) are assigned a wide range of functions, for the implementation of which they perform many tasks in various military conflicts. The results of the analysis give them the opportunity to reveal the problems in the use of UAVs, make changes in their functions and tasks and identify areas for further development. At present, this requires the introduction of the achievements of artificial intelligence, the introduction of expert systems and microelectronics on board UAVs, as well as their integration with various other means of conducting armed struggle. At the same time, some of the technological solutions for the creation and improvement of UAVs for military purposes can be applied in the civilian sector.

scholarly journals Key wireless communication technologies to support traffic management systems of unmanned aerial vehicles for civil application (review of foreign literature)

2021 ◽  
Vol 24 (2) ◽  
pp. 70-92
Author(s):  
E. A. Vinogradov
Keyword(s):  
Wireless Communication ◽  
Unmanned Aerial Vehicles ◽  
Communication Networks ◽  
Traffic Management ◽  
Communication Technologies ◽  
Unmanned Aircraft ◽  
Civil Aviation ◽  
Aerial Vehicles ◽  
Wide Range ◽  
Aircraft System

Not less than one hundred thousand Unmanned Aerial Vehicles (UAVs) are expected to perform flights simultaneously in Russia by 2035. The UAV fleet capacity triggers the development of the systems for informational support, operating control and management of UAV flights (Unmanned Aircraft System Traffic Management (UTM) systems) similar to that one already operating in manned aviation. The challenges arising in the sphere of civil aviation cannot be solved without wireless communication. The goals of this article are as follows: 1) familiarization of communication experts with the latest scientific developments of unmanned aerial technologies 2) description of the telecommunication-related problems of extensive systems of UAV control encountered by development engineers. In this article a schematic architecture and main functions of UTM systems are described as well as the examples of their implementation. Special emphasis is put on enhancing flight safety by means of a rational choice of communication technologies to manage conflicts (Conflict Management) known as "collision avoidance". The article analyzes the application of a wide range of wireless technologies ranging from Wi-Fi and Automatic Dependent Surveillance Broadcast (ADS-B) to 5G cellular networks as well as cell-free networks contributing to the development of 6G communication networks. As a result of the analysis, a list of promising research trends at the intersection of the fields of wireless communication and UAVs for civil application is made.

scholarly journals On dynamic characteristics and stability analysis of the ducted fan unmanned aerial vehicles

2019 ◽  
Vol 16 (4) ◽  
pp. 172988141986701 ◽  
Author(s):  
Cheng Chen ◽  
Tiantian Dong ◽  
Weijie Fu ◽  
Na Liu
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Parameter Design ◽  
Structural Parameter ◽  
Structure Parameters ◽  
Mechanical Structure ◽  
Near Earth Space ◽  
Ducted Fan ◽  
Aerial Vehicles ◽  
The Stability ◽  
Dynamics Stability

This article researches the improvement of dynamics stability of the ducted fan unmanned aerial vehicles by optimizing its mechanical–structure parameters. The instability phenomenon of ducted fan unmanned aerial vehicles takes place frequently due to the complicated airflow in near-earth space, which easily leads to the stability problems, such as out of control, shaking, and loss accuracy of command tracking. The dynamics equations mirror its dynamics characteristics, which are primarily influenced by the mechanical–structure parameters of the whole system. Based on this, the optimization of mechanical–structure parameters has a significant to improve the dynamics stability of the whole system. Therefore, this article uses the concept of Lyapunov exponents to build the quantification relationship between system’s mechanical–structure parameters and its motion stability to enhance its stability from viewpoint of mechanical–structural parameter design. The takeoff, landing, and hovering stage are respectively studied and the conclusions suggest that the optimization of mechanical–structure parameters can be used to promote dynamics stability.

scholarly journals Pareto Optimal PID Tuning for Px4-Based Unmanned Aerial Vehicles by Using a Multi-Objective Particle Swarm Optimization Algorithm

Aerospace ◽  
2020 ◽  
Vol 7 (6) ◽  
pp. 71
Author(s):  
Victor Gomez ◽  
Nicolas Gomez ◽  
Jorge Rodas ◽  
Enrique Paiva ◽  
Maarouf Saad ◽  
...  
Keyword(s):  
Particle Swarm Optimization ◽  
Unmanned Aerial Vehicles ◽  
Particle Swarm ◽  
Swarm Optimization ◽  
Multi Objective ◽  
Pid Tuning ◽  
Aerial Vehicles ◽  
The Stability ◽  
Selection Of

Unmanned aerial vehicles (UAVs) are affordable these days. For that reason, there are currently examples of the use of UAVs in recreational, professional and research applications. Most of the commercial UAVs use Px4 for their operating system. Even though Px4 allows one to change the flight controller structure, the proportional-integral-derivative (PID) format is still by far the most popular choice. A selection of the PID controller parameters is required before the UAV can be used. Although there are guidelines for the design of PID parameters, they do not guarantee the stability of the UAV, which in many cases, leads to collisions involving the UAV during the calibration process. In this paper, an offline tuning procedure based on the multi-objective particle swarm optimization (MOPSO) algorithm for the attitude and altitude control of a Px4-based UAV is proposed. A Pareto dominance concept is used for the MOPSO to find values for the PID comparing parameters of step responses (overshoot, rise time and root-mean-square). Experimental results are provided to validate the proposed tuning procedure by using a quadrotor as a case study.

Perching and resting—A paradigm for UAV maneuvering with modularized landing gears

2019 ◽  
Vol 4 (28) ◽  
pp. eaau6637 ◽  
Author(s):  
Kaiyu Hang ◽  
Ximin Lyu ◽  
Haoran Song ◽  
Johannes A. Stork ◽  
Aaron M. Dollar ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Power Consumption ◽  
Rapid Prototyping ◽  
Unmanned Aerial Vehicles ◽  
Reducing Power ◽  
Battery Power ◽  
Aerial Vehicles ◽  
Wide Range ◽  
Potential Applications ◽  
Time Of Operation

Perching helps small unmanned aerial vehicles (UAVs) extend their time of operation by saving battery power. However, most strategies for UAV perching require complex maneuvering and rely on specific structures, such as rough walls for attaching or tree branches for grasping. Many strategies to perching neglect the UAV’s mission such that saving battery power interrupts the mission. We suggest enabling UAVs with the capability of making and stabilizing contacts with the environment, which will allow the UAV to consume less energy while retaining its altitude, in addition to the perching capability that has been proposed before. This new capability is termed “resting.” For this, we propose a modularized and actuated landing gear framework that allows stabilizing the UAV on a wide range of different structures by perching and resting. Modularization allows our framework to adapt to specific structures for resting through rapid prototyping with additive manufacturing. Actuation allows switching between different modes of perching and resting during flight and additionally enables perching by grasping. Our results show that this framework can be used to perform UAV perching and resting on a set of common structures, such as street lights and edges or corners of buildings. We show that the design is effective in reducing power consumption, promotes increased pose stability, and preserves large vision ranges while perching or resting at heights. In addition, we discuss the potential applications facilitated by our design, as well as the potential issues to be addressed for deployment in practice.

scholarly journals Graphic Applications of Unmanned Aerial Vehicles (UAVs) in the Study of Industrial Heritage Assets

2020 ◽  
Vol 10 (24) ◽  
pp. 8821
Author(s):  
Sergio Martín-Béjar ◽  
Juan Claver ◽  
Miguel A. Sebastián ◽  
Lorenzo Sevilla
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Sugar Cane ◽  
Irrigation Water ◽  
Aerial Images ◽  
Indirect Measurements ◽  
Industrial Heritage ◽  
Aerial Vehicles ◽  
Wide Range ◽  
Water Pond ◽  
Conventional Systems

As a typology of cultural heritage, a wide range of singularities must to be taken into account when analysing industrial heritage assets. Graphical resources have been usually employed in heritage assets research. Nowadays, Unmanned Aerial Vehicles (UAVs) offer the possibility to obtain images of complex and difficult access areas that cannot be observed on the ground. Furthermore, aerial images allow to analyse heritage assets as a whole. Therefore, in this work, different photographs and videos has been carried out in the San Joaquin sugar cane factory and in the Aguila aqueduct, located in Nerja (Spain). These images have been used to analyse both assets as a set. Different indirect measurements on the factory chimney and irrigation water pond were taken. A Strengths, Weaknesses, Opportunities, and Threats (SWOT) about the use of UAV graphic applications in heritage assets was developed. Finally, the possibilities of conventional photograph technologies and UAV application were compared. Using UAVs allows more image acquisition possibilities than conventional systems. However, both technologies can be complemented and applied together when analysing heritage assets.

Quick Estimates for Analysis and Prediction of the Flight Mechanics of Unmanned Aerial Vehicles

2012 ◽  
Vol 40 (2) ◽  
pp. 121-145 ◽  
Author(s):  
Mark Müller ◽  
Leon Liebenberg ◽  
Edward H. Mathews ◽  
Peter W. Young
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Engineering Students ◽  
Analytical Techniques ◽  
Flight Dynamics ◽  
Flight Mechanics ◽  
Design Stage ◽  
Longitudinal Dynamics ◽  
Design Engineers ◽  
Aerial Vehicles ◽  
The Stability

Unmanned aerial vehicles (UAVs) are commonly employed in undergraduate engineering curricula. Limited literature is, however, available for the lay design engineer or engineering student regarding the modelling, simulation and analysis of the flight dynamics of small UAV systems, especially pertaining to flight dynamics modelling. There is great demand for unskilled UAV designers to predict the stability of new designs, quickly, cheaply, and with relative ease, preferably during the conceptual design stage. This paper summarizes some salient techniques for performing quick characterization of the longitudinal dynamics of a small, electrically propelled UAV, by using freely available software such as Datcom+, AVL, XFLR5 and MotoCalc. The simulation outputs compare favourably with experimental results from a wind tunnel. The software was also used to provide accurate estimates of coefficients required for performing an analysis of the UAV's longitudinal dynamics. The proffered analytical techniques should greatly benefit lay design engineers and engineering students venturing into the realm of UAV research.

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