Protection of a Stationary Object from the Massive Impact of Mobile Objects under Conditions of von Neumann's Mixed Game

2021 ◽  
Vol 27 (10) ◽  
pp. 521-530
Author(s):  
O. N. Maslov ◽  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Simulation Modeling ◽  
Statistical Simulation ◽  
Operating Conditions ◽  
Protection System ◽  
Stationary Object ◽  
Physical Protection ◽  
Mobile Objects ◽  
Aerial Vehicles ◽  
Statistical Risk

The method of statistical simulation modeling (SSM) has been used to analyze the operating conditions and the efficiency of the physical protection system of a stationary object from the massive impact of unmanned aerial vehicles (drones). It is shown that the conditions of the problem correspond to the reflexive version of a two-sided von Neumann's mixed game. statistical risk-oriented characteristics for two variants of the object protection system implementation using force mechanical and electromagnetic effects on the "drones cloud" are determined. The possibilities and the prospects for using the results obtained using the SSM method are presented.

scholarly journals Classification of robotic battery service systems for unmanned aerial vehicles

2018 ◽  
Vol 161 ◽  
pp. 03023
Author(s):  
Tien Ngo ◽  
Mehmet Guzey ◽  
Vladimir Dashevsky
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Power Supply ◽  
Landing Site ◽  
Operating Conditions ◽  
Joint Work ◽  
Operator Experience ◽  
Aerial Vehicles ◽  
Robotic Platforms ◽  
Algorithmic Model

Existing examples of prototypes of ground-based robotic platforms used as a landing site for unmanned aerial vehicles are considered. In some cases, they are equipped with a maintenance mechanism for the power supply module. The main requirements for robotic multi-copter battery maintenance systems depending on operating conditions, required processing speed, operator experience and other parameters are analyzed. The key issues remain questions of the autonomous landing of the unmanned aerial vehicles on the platform and approach to servicing battery. The existing prototypes of service robotic platforms are differed in the complexity of internal mechanisms, speed of service, algorithms of joint work of the platform and unmanned aerial vehicles during the landing and maintenance of the battery. The classification of robotic systems for servicing the power supply of multi-copter batteries criteria is presented using the following: the type of basing, the method of navigation during landing, the shape of the landing pad, the method of restoring the power supply module. The proposed algorithmic model of the operation of battery power maintenance system of the multi-copter on ground-based robotic platform during solving the target agrarian problem is described. Wireless methods of battery recovery are most promising, so further development and prototyping of a wireless charging station for multi-copter batteries will be developed.

scholarly journals Aerodynamic efficiency and performance enhancement of fixed-wing unmanned aerial vehicles using novel configurations and techniques

2018 ◽  
Author(s):  
Περικλής Παναγιώτου
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Performance Enhancement ◽  
Operating Conditions ◽  
Aerodynamic Efficiency ◽  
Aerial Vehicles ◽  
And Performance

Ο σκοπός της διδακτορικής διατριβής είναι η βελτιστοποίηση της αεροδυναμικής απόδοσης και των επιδόσεων Μη-Επανδρωμένων Αεροχημάτων (ΜΕΑ) σταθερής πτέρυγας, μεγάλης αυτονομίας και μέσου ύψους (MALE UAV ή tactical UAV – NATO classification), που επιχειρούν σε συνθήκες πτήσης με Mach < 0.3. Πρόκειται για μια πλήρη τεχνολογική έρευνα, τα βασικά αντικείμενα της οποίας είναι α) η διερεύνηση της ροής γύρω από ΜΕΑ σταθερής πτέρυγας, β) η ανάλυση του ισοζυγίου οπισθέλκουσας δύναμης και εντοπισμός των κύριων πηγών αυτής, γ) η αναζήτηση, καταγραφή, και αξιολόγηση πιθανών τεχνολογιών, γεωμετριών, και τεχνικών για τη βελτίωση της αεροδυναμικής απόδοσης και των επιδόσεων ΜΕΑ (technology screening), δ) η επιλογή και λεπτομερής διερεύνηση των γεωμετριών που δυνητικά προσφέρουν τα περισσότερα πλεονεκτήματα, και ε) η εφαρμογή των παραπάνω σε εφαρμοσμένες μελέτες σχεδιασμού ΜΕΑ για αξιολόγηση και εκτίμηση επιδόσεων. Σε αντίθεση με τις υπάρχουσα βιβλιογραφία, η παρούσα έρευνα προσεγγίζει ολιστικά τον σχεδιασμό και την βελτιστοποίηση των ΜΕΑ σταθερής πτέρυγας, εκκινώντας από θεμελιώδεις ρευστοδυναμικές αναλύσεις, συνεχίζοντας με παραμετρικές αναλύσεις αεροδυναμικής, και κλείνοντας με εφαρμογή σε ολοκληρωμένες μελέτες σχεδιασμού. Για αυτό το σκοπό χρησιμοποιείται μια πληθώρα εργαλείων, που περιλαμβάνουν λογισμικά υπολογιστικής μοντελοποίησης, πειραματικές διατάξεις και τεχνικές, καθώς επίσης και αναλυτικά εργαλεία διαστασιολόγησης, και υπολογισμού παραμέτρων αεροδυναμικής, ευστάθειας και επιδόσεων αεροχημάτων, που αναπτύχθηκαν στα πλαίσια της διατριβής (in-house tools). Αρχικά καθορίζεται και σχεδιάζεται μια γεωμετρία αναφοράς ΜΕΑ, της οποίας οι προδιαγραφές (requirements) και οι επιχειρησιακές συνθήκες (operating conditions) ορίζονται επίσης ως σημεία αναφοράς. Η ροή γύρω από το ΜΕΑ αναλύεται χρησιμοποιώντας τα εργαλεία αεροδυναμικής ανάλυσης και πραγματοποιείται μια ταξινόμηση της οπισθέλκουσας δύναμης (drag bookkeeping), τόσο για την κύρια πτέρυγα, όσο και για την συνολική γεωμετρία του ΜΕΑ. Στη συνέχεια, ερευνάται μια πληθώρα πιθανών επιλογών, τεχνολογιών, τεχνικών και γεωμετριών, που δυνητικά μπορεί να βελτιώσουν την επίδοση των ΜΕΑ σταθερής πτέρυγας. Δύο είδη γεωμετριών επιλέγονται τελικά για ενδελεχή μελέτη και περεταίρω ανάλυση, και συγκεκριμένα, τα winglets και τα σώματα BWB. Οι γεωμετρίες αυτές αναλύονται διεξοδικά σε υπολογιστικό, πειραματικό, και σχεδιαστικό επίπεδο. Όπως πιστοποιείται και από τις σχετικές επιστημονικές δημοσιεύσεις, η έρευνα οδηγεί σε πρωτότυπα συμπεράσματα και παρατηρήσεις που αφορούν τα ροϊκά φαινόμενα, και σε ανάπτυξη εξειδικευμένων μεθοδολογιών σχεδιασμού για εφαρμογές ΜΕΑ σταθερής πτέρυγας. Γίνεται επίσης και αποτίμηση των πλεονεκτημάτων της χρήσης των γεωμετριών αυτών, με τα αποτελέσματα να δείχνουν βελτίωση της τάξεως του 10% και 30% για τα winglets και τις πλατφόρμες BWB αντίστοιχα, όσον αφορά την αεροδυναμική απόδοση. Συνοψίζοντας, η διατριβή επικεντρώνεται στα ΜΕΑ τύπου MALE/tactical, λόγω του ότι αποτελούν το μεγαλύτερο κομμάτι της αγοράς των ΜΕΑ. Ωστόσο, με την προϋπόθεση ότι οι λόγοι ροϊκής ομοιότητας και οι επιχειρησιακές συνθήκες είναι πανομοιότυπες, οι προτεινόμενες μέθοδοι και τα επαγόμενα συμπεράσματα μπορούν να επεκταθούν και σε οποιοδήποτε άλλο αερόχημα σταθερής πτέρυγας, από ΜΕΑ μεγαλύτερης κλίμακας, μέχρι υπερ-ελαφρά ή ελαφρά αεροχήματα και μεταγωγικά αεροσκάφη. Επιπρόσθετα, η έρευνα που αφορά είτε σε στοιχειώδη ρευστοδυναμικά φαινόμενα, όπως είναι οι δίνες ακροπτερυγίου, είτε στις βελτιωτικές διατάξεις (winglets, BWB) έχει προεκτάσεις και σε άλλες εφαρμογές μεγαλύτερης κλίμακας, που αφορούν την κοινωνία και την βιομηχανία, όπως είναι για παράδειγμα τα επιβατηγά αεροσκάφη και οι εναέριες μεταφορές.

scholarly journals Modelling and Experimental Validation of a Hybrid Electric Propulsion System for Light Aircraft and Unmanned Aerial Vehicles

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3969
Author(s):  
Massimo Cardone ◽  
Bonaventura Gargiulo ◽  
Enrico Fornaro
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Model Validation ◽  
Electric Propulsion ◽  
Combustion Engine ◽  
Propulsion System ◽  
Operating Conditions ◽  
Total Power ◽  
Electric Propulsion System ◽  
Aerial Vehicles ◽  
Hybrid Electric

This article presents a numerical model of an aeronautical hybrid electric propulsion system (HEPS) based on an energy method. This model is designed for HEPS with a total power of 100 kW in a parallel configuration intended for ultralight aircraft and unmanned aerial vehicles (UAV). The model involves the interaction between the internal combustion engine (ICE), the electric motor (EM), the lithium battery and the aircraft propeller. This paper also describes an experimental setup that can reproduce some flight phases, or entire missions, for the reference aircraft class. The experimental data, obtained by reproducing two different take-offs, were used for model validation. The model can also simulate anomalous operating conditions. Therefore, the tests chosen for the model validation are characterized by the EM flux weakening (“de-fluxing”). This model is particularly suitable for preliminary stages of design when it is necessary to characterize the hybrid system architecture. Moreover, this model helps with the choice of the main components (e.g., ICE, EM, and transmission gear ratio). The results of the investigation conducted for different battery voltages and EM transmission ratios are shown for the same mission. Despite the highly simplified model, the average margin of error between the experimental and simulated results was generally under 5%.

Planning the search for separating parts of the launch vehicle using a group of unmanned aerial vehicles

2020 ◽  
Author(s):  
V.I. Goncharenko ◽  
G.N. Lebedev ◽  
D.A. Mikhaylin
Keyword(s):  
Genetic Algorithm ◽  
Unmanned Aerial Vehicles ◽  
Launch Vehicles ◽  
Maintenance Schedule ◽  
Mobile Objects ◽  
Aerial Vehicles ◽  
The Right ◽  
Original Approach ◽  
Research Show ◽  
Better Than

The paper deals with the processes of maintaining a special class of mobile objects, whose schedules are either given or require preassignment in order to maintain these objects at the right time and in the right place. The posed problem of planning the flight of a group of aerial vehicles is solved using a continuous form of dynamic programming, according to which the Bellman equation in partial derivatives corresponds to the optimality condition. An original approach to solving the problem of pre-flight and operational planning of actions of a group of unmanned aerial vehicles based on a genetic algorithm is proposed. The fundamental difference between the problem being solved and the well-known traveling salesman problem is in taking into account the required maintenance schedule. The developed planning automation tool makes it possible to increase the efficiency of measures to detect separating parts of launch vehicles using a group of unmanned aerial vehicles. Findings of research show that the developed genetic algorithm is better not only than algorithms based on one-parameter and two-parameter criteria, but even better than algorithms based on a three-parameter criterion.

scholarly journals Design and construction of a UAV device with a fixed wing for the conditions of rescue services

2021 ◽  
Author(s):  
Nikolas Michael Petrík ◽  
◽  
Pavol Pecho
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Unmanned Aerial Vehicle ◽  
Forest Fires ◽  
Rapid Development ◽  
Operating Conditions ◽  
Efficient Operation ◽  
Rescue Services ◽  
Aerial Vehicles ◽  
Aerial Vehicle ◽  
Technical Properties

The paper is focused on comprehensive design of an unmanned aerial vehicle with fixed wing, which would add efficiency to specific activities performed by rescue services. The current rapid development of unmanned aerial vehicles is slowly becoming part of many industries around the world. The aim of this paper is to design an unmanned aerial vehicle that could provide safe, reliable, and efficient operation. The overall design, construction, and installation of the proposed unmanned aerial vehicle should integrate several modern technologies. To make an ideal design of unmanned aerial vehicle it is required to possess the knowledge of current construction methods of additive manufacturing, understanding of legislation in operating conditions and, in addition to general knowledge of unmanned vehicles, also comprehensive skills in programming and configuration of autonomous control elements of autonomous unmanned systems. After the production of the unmanned aerial vehicle with fixed wing, very good technical properties were demonstrated during experimental ground tests. Achieved technical properties are comparable to those owned by the unmanned aerial vehicles that are currently on the market. The final design configuration using an infrared-sensitive optical device could perform activities such as: searching for missing persons in hard-to-reach and vast terrain or searching for forest fires.

Assessing the risk of a nuclear power plant in a terrorist attack. Application of physical protection systems. Ray-tracing technology optimization techniques

2020 ◽  
Author(s):  
Anton Oboimov ◽  
Oleg Zolotarev ◽  
Ivan Cheremisenov ◽  
E. Fedoseeva ◽  
A. Tokarev ◽  
...  
Keyword(s):  
Terrorist Attack ◽  
Human Life ◽  
Optimization Techniques ◽  
Operating Conditions ◽  
Protection System ◽  
Physical Protection ◽  
Protection Systems ◽  
The Cost ◽  
Physical Protection System ◽  
Physical Protection Systems

Terrorism today is one of the main threats to human civilization. In recent years, international terror has proved its extreme cruelty, its readiness to stop at nothing in order to achieve its goals. As a result of committing terrorist acts, innocent people, children, women and old people suffer. For a terrorist, human life has no value. With the modern variety of potentially dangerous objects and their functional orientation, it is impossible to ensure safety with standard solutions, using uniform strategies, tactical schemes and techniques, and the same type of equipment. If we simply follow the path of ensuring the maximum level of safety, it may turn out that at most facilities the cost of the applied technological means will be many times greater than the cost of the technological equipment of the facility and even the facility itself. Hence, it follows that in order to create effective physical protection systems or to effectively modernize existing physical protection systems, it is necessary to analyze these systems, to identify the weakest and most protected places that need strengthening. At the same time, an important difference must be taken into account between physical protection systems and other safety systems used to protect against natural disasters (such as earthquakes, floods, tornadoes, hurricanes, etc.) and against abnormal operating conditions (such as fire, malfunctions in electrical equipment, etc.). Unlike human violators, security breaches are subject to strict laws and do not happen without reason. For example, the fire of a fire can only burn while there is fuel and oxygen. If one of these elements is removed, the fire will go out. Also, a fire cannot decide where and when it will occur, and how it will progress. Conversely, the human adversary (intruder) has the ability to decide whether to attack, when and how to attack, can adjust to the measures of the physical protection system to counter it, and possibly even outwit and defeat them. All this introduces a significant element of uncertainty into the process of analyzing and evaluating the effectiveness of the physical protection system. Taking into account the above, the task of developing a methodological approach to risk assessment when committing a terrorist attack using physical protection systems, taking into account the optimization of calculations of cost-intensive algorithms in real time, becomes more and more urgent. In this article, the authors attempt to create this approach.

scholarly journals Current Challenges and Prospective Benefits of Using UAVs

2021 ◽  
Vol 44 (4) ◽  
pp. 30-35
Author(s):  
Carmelia Mariana DRAGOMIR BĂLĂNICĂ ◽  
Adrian LEOPA
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Business Models ◽  
Review Paper ◽  
Operating Conditions ◽  
The Other ◽  
Present Review ◽  
Movie Industry ◽  
Aerial Vehicles ◽  
Modern Economy ◽  
Near Future

The modern economy completely changed by offering to industry groups the capability to reorganize their operating processes. Nowadays we become observers of similar in scale revolutionary transformations: technologies for the use of unmanned aerial vehicles substantially modified business models and new operating conditions have been developed in various sectors from industries, agriculture to the emergency, parcel delivery or movie industry. In the very near future, clients’ enterprises from multiple sectors of the economy will recognize the first effect of the use of unmanned aerial vehicles (UAVs) in diverse fields - from commercial sectors to examining and exploring the environment or to reduce the impacts of unexpected disasters. The aim of the present review paper is to analyse the opportunities and advantages of using the application of UAVs technologies. On the other hand, not only the devices (drones) themselves are of importance, but also their wider utilization to acquire extraordinary volumes of data.

scholarly journals 2D Omni-Directional Wireless Power Transfer Modeling for Unmanned Aerial Vehicles with Noncollaborative Charging System Control

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2858
Author(s):  
Oussama Allama ◽  
Mohamed Hadi Habaebi ◽  
Sheroz Khan ◽  
Elfatih A. A. Elsheikh ◽  
Fakher Eldin M. Suliman
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Wireless Power Transfer ◽  
Input Power ◽  
Operating Conditions ◽  
System Control ◽  
Power Transfer ◽  
Wireless Power ◽  
Angular Rotation ◽  
Aerial Vehicles ◽  
Rotating Load

Wireless power transfer (WPT) has been extensively studied from various aspects such as far field and near field, operating frequency, coil design, matched capacitance values, misaligned locations of transmitting and receiving coils, distance variance between them, target loads in the specific locations, environment, and operating conditions. This is due to the usefulness of WPT technology in many applications, including the revolutionary method of auto-recharging of unmanned aerial vehicles (UAVs). This paper presents analytical modeling of a WPT-link with two orthogonal transmitting coils arranged to produce an omnidirectional magnetic field suitable for charging a moving rotating load, maximizing energy transfer without any feedback from the receiving end. To achieve a suitable 2D WPT simulation system, as well as an accurate control design, the mutual coupling values in terms of receiver angular rotation are simulated using Ansys software. Power transfer is maximized by using extremum seeking control (ESC), making use of the input power as an objective function with specific parameter values that represent the WPT model to obtain the results. The results shown are those of the input power transmitted by the transmitting-end coils to a load of an orbiting mobile UAV. Based on the simulation results, the controller can achieve maximum power transfer in 100 µs of duration when the speed of the UAV is close to 314 rad/s.

Manpower, Skill and Fatigue Analysis of Future Unmanned Aerial Vehicle (UAV) Environments

2002 ◽  
Vol 46 (23) ◽  
pp. 1905-1909 ◽  
Author(s):  
Brett Walters ◽  
Michael J. Barnes
Keyword(s):  
Human Factors ◽  
Unmanned Aerial Vehicles ◽  
Unmanned Aerial Vehicle ◽  
Simulation Modeling ◽  
Cognitive Skills ◽  
Human Engineering ◽  
Military Operations ◽  
Aerial Vehicles ◽  
Aerial Vehicle ◽  
The U.S

Recent military operations conducted by the U.S. have brought to light several human factors challenges in regard to the control of unmanned aerial vehicles (UAVs). The purpose of this research was to examine the crew environment and soldier performance issues related to future UAV systems. Multiple studies were conducted using a variety of human engineering tools to address UAV crew issues related to: 1) the utility of having rated aviators as crewmembers, 2) supplementing current crews with imagery and intelligence specialists, 3) the use of automation to improve systems efficiency, and 4) the effects of crew size, rotation schedule, and fatigue on crewmember performance. No evidence was found to support a requirement for rated aviators in future Army missions. However, the use of cognitively oriented embedded training simulators was suggested to aid novices in developing the cognitive skills exhibited by experts. The effectiveness of adding imagery specialists to crews is discussed, as well as specific recommendations related to automation and crew size derived from simulation modeling.

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