scholarly journals Mathematical model of a communication channel with an unmanned aerial vehicle

2021 ◽  
Vol 24 (3) ◽  
pp. 71-79
Author(s):  
Nikolay S. Arkhipov ◽  
Ivan S. Polyansky ◽  
Yuri N. Yakovlev ◽  
Alexander V. Subbotenko
Keyword(s):  
Mathematical Model ◽  
Unmanned Aerial Vehicle ◽  
Quality Indicator ◽  
Electromagnetic Waves ◽  
Communication Channel ◽  
Communication Quality ◽  
Energy Parameters ◽  
Aerial Vehicle ◽  
Partial Shade ◽  
The Mathematical Model

In this paper, a mathematical model of a communication channel with an unmanned aerial vehicle and taking into account the specifics of the locations of a ground communication point when determining the effects of refraction, diffraction and interference of electromagnetic waves is proposed. A meaningful statement of the problem based on the mathematical relationship between the energy parameters of the first transmission equation and the quality indicators (BER) of the second transmission equation has been formed. The main features of calculating the parameters of the first equation are to determine the rules for calculating the level of attenuation due to the influence of the earths surface. The calculation of attenuations for cases of removal of an unmanned aerial vehicle from a ground communication point within the areas of line of sight, partial shade and shadow has been clarified. The second transmission equation is based on the mathematical model of the Rice communication channel. With respect to the energy parameters and the selected communication quality indicator for the formed mathematical model, examples of graphical dependencies are given in the study of typical computational problems. With respect to the energy parameters and the selected communication quality indicator for the formed mathematical model, examples of graphical dependencies in the study of typical computational problems are given.

scholarly journals Probabilistic analysis of getting into in restricted area by unmanned aerial vehical

2019 ◽  
pp. 46-54
Author(s):  
A. A. Lobaty ◽  
Y. F. Yatsyna ◽  
V. Y. Stepanov ◽  
A. Y. Bumai
Keyword(s):  
Mathematical Model ◽  
Unmanned Aerial Vehicle ◽  
Probabilistic Analysis ◽  
Stochastic Equation ◽  
Random Structure ◽  
Restricted Area ◽  
Phase Coordinates ◽  
Probability Densities ◽  
Aerial Vehicle ◽  
The Mathematical Model

The probabilistic analysis of crossing by an unmanned aerial vehicle (UAV) of the boundary of the no-fly area is solved. Condition of stating of the fact of the violation of the boundary of the restricted area is to stand of UAV within the area during a specified time. The substantiation of the mathematical model to research through linearized vector stochastic equation is carried out. The problem is solved by applying the theory of Markov processes of random structure with absorption of realizations at the boundary of a given area. Particularity of the approach is the contemporaneously consideration of two probability densities of the distribution of phase coordinates that describe the boundary conditions. In this case, two equations systems are solved for probabilistic moments: taking into account the absorption of realizations and without taking into account the absorption. The probability of an object gets into specified area and do not leave one during the time that necessary to notice the unmanned aerial vehicle at the restricted area.

The Modeling and Simulation of UAV Pneumatic Launch System

2013 ◽  
Vol 299 ◽  
pp. 27-30
Author(s):  
Xiao Long Liu ◽  
Chuang Na Xia ◽  
Sheng Gang Ma
Keyword(s):  
Mathematical Model ◽  
Modeling And Simulation ◽  
Unmanned Aerial Vehicle ◽  
Future Development ◽  
Theoretical Foundation ◽  
Bond Graph ◽  
Inflation Pressure ◽  
Work Process ◽  
Aerial Vehicle ◽  
The Mathematical Model

This paper is based on the Bond Graph method to establish the mathematical model of UAV (Unmanned Aerial Vehicle) pneumatic launch system, simulates its work process through using MATLAB software, analyzes the influence of changing air tank inflation pressure, air tank volume on launch performance, and draws some important conclusions, which can provide a theoretical foundation for the future development and improvement of the system.

scholarly journals Analysis, Mathematical Model and Simulation Tests of the Unmanned Aerial Vehicle Control System

2019 ◽  
Vol 24 ◽  
pp. 01005
Author(s):  
Lucjan Setlak ◽  
Rafał Kowalik
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Unmanned Aerial Vehicle ◽  
Dynamic Control ◽  
Vehicle Control ◽  
Model And Simulation ◽  
Aerial Vehicle ◽  
The Subject ◽  
Dynamic Control System ◽  
The Mathematical Model

The subject of this paper is to analyze, create a dynamic mathematical model and, on this basis, conduct simulation tests of the control system used in unmanned aerial vehicles. The key objective of the work is to develop a mathematical model of a control system based on the conducted studies of P, PI and PID regulators. The summary of this article are selected simulation tests of the proposed unmanned aerial vehicle (UAV) control system based on the analysis performed, the mathematical model developed for the dynamic control system and based on them, drawing practical conclusions.

scholarly journals SYNTHESIS OF THE MATHEMATICAL MODEL OF THE AUTOMATIC CONTROL SYSTEM OF THE UNMANNED AIRCRAFT COURSE

2019 ◽  
pp. 152-159
Author(s):  
I. V. Zimchuk ◽  
V. I. Ishchenko ◽  
T. M. Shapar
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Control System ◽  
Automatic Control ◽  
Unmanned Aerial Vehicles ◽  
Unmanned Aerial Vehicle ◽  
Automatic Control System ◽  
Aerial Vehicles ◽  
Aerial Vehicle ◽  
The Mathematical Model

Unmanned aerial vehicles are by far the most promising military and civilian systems. There is a tendency to increase the efforts of a number of leading countries in the development of unmanned aerial vehicles and their complexes. The mathematical model of any system reflects in one way or another its real properties, including the existing limitations. It has been found that one of the most favorable and efficient methods for constructing mathematical models of automatic control systems is to develop them using transfer functions. In order to solve this problem, the article deals with the composition of the control system of a drone. A mathematical model consisting of the joint design of the unmanned aerial vehicle and its automatic control system has been synthesized. The description of the proposed mathematical model of the system is based on the representation of a linear continuous system by the difference equations obtained using the Tustin relation. The mathematical model proposed in the article can be used for the study of typical aircraft whose course management system is built according to the considered structure. The practical significance of the obtained results is the possibility of applying the developed mathematical model to study the dynamics of the change of state and to set up the system of automatic control of the course of the unmanned aerial vehicle through computer simulation. Prospects for further research in this area are computer simulation of an unmanned aerial vehicle control system and estimation of the accuracy of the mathematical model developed.

scholarly journals Dynamic Simulation of a UAV Moving on Launcher

Proceedings ◽  
2020 ◽  
Vol 39 (1) ◽  
pp. 26
Author(s):  
Homsup ◽  
Pinyochon ◽  
Narathee ◽  
Weng ◽  
Homsup
Keyword(s):  
Mathematical Model ◽  
Differential Equations ◽  
Dynamic Simulation ◽  
Unmanned Aerial Vehicle ◽  
Drag Forces ◽  
Aerial Vehicle ◽  
Lift And Drag ◽  
The Mathematical Model ◽  
Launch Angle ◽  
Aerodynamic Lift

This paper presents a dynamic simulation of Unmanned Aerial Vehicle (UAV) moving on a launcher. The UAV launcher consists of a metal rail that is positioned at a launch angle, a spring and a winch to be able to stretch the spring. Prior to launch the spring is stretched into necessary tension and secured with safety pins, then released to launch the UAV. The influence of aerodynamic lift and drag forces on the mathematical model of a UAV will be considered in detail. Mathematical model a UAV moving on a launcher represented by differential equations are solved using a MATLAB software. The results of calculations are represented by a graph which shows distance, velocity and acceleration of a UAV while moving on a launcher as a function of time.

scholarly journals MATHEMATICAL MODELLING OF THE UNMANNED AERIAL VEHICLE DYNAMICS

2018 ◽  
pp. 37-44
Author(s):  
V. Y. Stepanov
Keyword(s):  
Mathematical Model ◽  
Mathematical Modelling ◽  
Unmanned Aerial Vehicle ◽  
Vehicle Dynamics ◽  
Point Of View ◽  
Dynamics Analysis ◽  
Aerial Vehicle ◽  
Main Components ◽  
Controlled Object

The article gives a classification of the main components of unmanned aerial vehicle (UAV) systems, gives the areas in which the application of UAVs is actual in practice today. Further, the UAV is considered in more detail from the point of view of its flight dynamics analysis, the equation necessary for creating a mathematical model, as well as the model of an ordinary dynamic system as a non-stationary nonlinear controlled object, is given. Next, a description of the developed software for modeling and a description of program algorithm are given. Finally, a conclusion describes the necessary directions for further scientific researches.

scholarly journals An overview of various kinds of wind effects on unmanned aerial vehicle

2019 ◽  
Vol 52 (7-8) ◽  
pp. 731-739 ◽  
Author(s):  
Bo Hang Wang ◽  
Dao Bo Wang ◽  
Zain Anwar Ali ◽  
Bai Ting Ting ◽  
Hao Wang
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Great Influence ◽  
Wind Disturbance ◽  
Wind Fields ◽  
Wind Model ◽  
Aerial Vehicle ◽  
Low Altitude ◽  
The Stability ◽  
The Mathematical Model ◽  
Vehicle Movement

Attitude, speed, and position of unmanned aerial vehicles are susceptible to wind disturbance. The types, characteristics, and mathematical models of the wind, which have great influence on unmanned aerial vehicle in the low-altitude environment, are summarized, including the constant wind, turbulent flow, many kinds of wind shear, and the propeller vortex. Combined with the mathematical model of the unmanned aerial vehicle, the mechanism of unmanned aerial vehicle movement in the wind field is illustrated from three different kinds of viewpoints including velocity viewpoint, force viewpoint, and energy viewpoint. Some simulation tests have been implemented to show the effects of different kinds of wind on unmanned aerial vehicle’s path and flight states. Finally, some proposals are presented to tell reader in which condition, which wind model should be added to simulation, and how to enhance the stability of unmanned aerial vehicle for different kinds of wind fields.

scholarly journals СИСТЕМА РАСПОЗНАВАНИЯ СТЕГАНОГРАФИЧЕСКИ-ПРЕОБРАЗОВАННЫХ ГОЛОСОВЫХ КОМАНД УПРАВЛЕНИЯ БПЛА

2018 ◽  
pp. 20-28
Author(s):  
Александр Юрьевич Лавриненко ◽  
Юрий Анатольевич Кочергин ◽  
Георгий Филимонович Конахович
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Vehicle Control ◽  
Mel Frequency Cepstral Coefficients ◽  
Control Information ◽  
Cepstral Analysis ◽  
Voice Control ◽  
Aerial Vehicle ◽  
Cepstral Coefficients ◽  
The Difference ◽  
The Mathematical Model

It is created the system of recognition the steganographic-transformed voice commands of unmanned aerial vehicle control based on a cepstral analysis. It provides effective recognition and hidden commands transmission of to the board of an unmanned aerial vehicle, by converting voice control commands into a kind of steganographic characteristics vector, which implies the concealment of voice control information of an unmanned aerial vehicle. The mathematical model of the algorithm for calculating the mel-frequency cepstral coefficients and the recognition classifier of voice control commands for the solution of the problem of semantic identification and securing the control information of the unmanned aerial vehicle in the communication channel is synthesized. A software package has been developed that includes tools for compiling the base of reference voice images of subjects of management for training and testing the system for recognizing steganographic-transformed voice commands of the unmanned aerial vehicle control based on the cepstral analysis and computer models of the proposed methods and algorithms for recognition voice control commands in the MATLAB environment. The expediency of applying the proposed system for recognizing steganographic-transformed voice commands of the unmanned aerial vehicle control based on a cepstral analysis is substantiated and experimentally proved. An algorithm is presented for calculating the mel-frequency cepstral coefficients that appear in the role of the main features of recognition and the result of the steganographic transformation of speech, where for the evaluation of automatic recognition of voice commands using the results of classifier constructed by the criterion of minimum distance in the role which acts as the variance of the difference of the expectation of a mel-frequency cepstral coefficients. The obtained results of the experimental research allow to draw a conclusion about the expediency of further practical application of the developed system of recognition the steganographic-transformed voice commands of the unmanned aerial vehicle control based on the cepstral analysis

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