Mathematical Model of the Radio Channel Altimeter for Unmanned Aerial Vehicles

2019 ◽  
Author(s):  
A. G. Samoylov ◽  
S. A. Samoylov
Keyword(s):  
Mathematical Model ◽  
Unmanned Aerial Vehicles ◽  
Radio Channel ◽  
Aerial Vehicles

scholarly journals Modeling Goodput for Data Transmission in FANET

2020 ◽  
Vol 6 (1) ◽  
pp. 100-108
Author(s):  
I. Kaisina
Keyword(s):  
Mathematical Model ◽  
Unmanned Aerial Vehicles ◽  
Transfer Process ◽  
Data Transmission ◽  
Data Transfer ◽  
Network Simulator ◽  
Data Traffic ◽  
Stream Data ◽  
Ground Station ◽  
Aerial Vehicles

This paper investigates the process of multi-stream data transmission from several unmanned aerial vehicles (UAV) to a ground station. We can observe a mathematical model of the data transfer process at the application level of the OSI model (from flying nodes to a ground station). The Poisson – Pareto packet process is used to describe the multi-stream data traffic. The results of simulation are obtained using the network simulator NS-3. It is considered a system for emulating the process of multi-stream data transmission from UAV to a ground station. Acording to the results of studies for multi-stream data transmission it is clear that the increase of the UAV source nodes which simultaneously transmit data to a ground station needs higher requirements for Goodput.

scholarly journals Numerical Simulation of the Motion of an Unmanned Aerial Vehicle

2018 ◽  
Vol 221 ◽  
pp. 05003
Author(s):  
Il’ya O. Akimov ◽  
Vsevolod V. Koryanov
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Unmanned Aerial Vehicles ◽  
Unmanned Aerial Vehicle ◽  
Software Package ◽  
Aerial Vehicles ◽  
Aerial Vehicle ◽  
Execution Environment ◽  
Controlled Motion

Unmanned aerial vehicles are used for research in many areas: photography and video shooting and so on. The development of unmanned aerial vehicles is directly related to the development of airspace. Today, a mathematical model is required that would describe the movement of such an aircraft with the purpose of predicting, correcting and optimizing it. The paper presents the results of a study of the controlled motion of an unmanned multi-rotor aircraft using the example of a quadrocopter. The study included the development of a law governing the apparatus and its modeling in the form of a software package. The structure of the autopilot, its main contours and parameters of these circuits are considered. After determining the necessary characteristics of the autopilot, modeling of the controlled motion of the quadrocopter in the execution environment was carried out.

scholarly journals TO THE CALCULATION OF ACOUSTIC FIELD CHARACTERISTICS FOR QUADCOPTER PROPELLERS

2019 ◽  
Vol 27 (4) ◽  
pp. 42-51
Author(s):  
Galina Ivanovna Sokol ◽  
Valeriy Yevgenovich Nekrasov ◽  
Vladislav Semenovich Zhmurko
Keyword(s):  
Mathematical Model ◽  
Unmanned Aerial Vehicles ◽  
Acoustic Field ◽  
Sound Pressure ◽  
Sound Field ◽  
Noise Distribution ◽  
Aerial Vehicles ◽  
Basic Law ◽  
Analytical Review ◽  
Scope Of Application

The work defines the area of use of unmanned aerial vehicles (UAVs) of the type of quadrocopter and calculated the acoustic field of propellers in order to reduce the level of noise at some distance. The main sources of noise, which are the hubs of the quadrocopter, are considered. The first samples of UAVs appeared in the middle of the last century as a separate type of promising weapons, but now quadrocopter,began to be actively used in the civilian sphere. The theory of the sound field of the aircraft's air propeller, which was proposed by L. Gutin to simulate the noise from each of the chochire screws of the quadrocopter, was carried out. A mathematical model has been created for calculating the total acoustic field all the of quadrocopter screws. The analysis and the defined area of use of UAVs of type quadrocopter  and the calculation of acoustic field of screws is given in order to reduce the noise level at some distance. The authors conducted an analytical review of the existing models of UAVs and quadrocopters, considered general examples of use of quadrocopters, their purpose and scope of application. On the basis of analytical review of constructions the fundamental scheme of quadrocopter for researches is given. The article is driven by the principal scheme of the chosen quadrocopter with the description of its main nodes. Based on the results of calculations, the noise distribution schedules of different frequencies in the space are constructed. The results from sound pressure levels for each of the five harmonics. Description of direction of acoustic fields on separate frequencies each of harmonics is constructed using the Besselyu function. Mathematical calculations have been performed in MathCad 2015. There are two forces on each screw element: thrust and resistance of the rotary motion. From the Basic Law of mechanics it follows that this element, in its turn, influences the environment with equal magnitude and opposable directed forces.

scholarly journals Influence of wind disturbances and nonlinearities of servo drive on the contour of stabilization of the flight of height of unmanned aerial vehicle

2019 ◽  
pp. 23-30
Author(s):  
V. A. Malkin ◽  
I. V. Rozhkov ◽  
A. A. San’ko
Keyword(s):  
Mathematical Model ◽  
Comparative Analysis ◽  
Unmanned Aerial Vehicles ◽  
Control Systems ◽  
Velocity Vector ◽  
Flight Altitude ◽  
Servo Drive ◽  
Automatic Control Systems ◽  
Aerial Vehicles ◽  
Aerial Vehicle

The article discusses a mathematical model of wind, taking into account its stochastic component and wind of a steady direction, presents the results of a comparative analysis of the effect of wind parameters on the total wind velocity vector acting on unmanned aerial vehicles (UAV). The main non-line arities of the autopilot servo elements and their influence on the output signal are considered. The reaction of the contour of the UAV flight altitude stabilization to the wind is considered, taking into account the nonlinearity of the servo drive elements. Proved the need to take into account the wind in the synthesis of automatic control systems (ACS) and the contours of the angular stabilization of the drone at stages where the flight speed of the drone is less than 30 m / s.

scholarly journals The Mathematical Model for Research of the UAV Longitudinal Moving

2021 ◽  
Vol 13 (5) ◽  
pp. 29-39
Author(s):  
Sergii Zhdanov ◽  
◽  
Natalia Kadet ◽  
Valerii Silkov ◽  
Mariia Zirka ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Mathematical Models ◽  
Frequency Response ◽  
Unmanned Aerial Vehicles ◽  
Control Systems ◽  
Aerial Vehicles ◽  
General Mathematical Model ◽  
Logarithmic Frequency ◽  
The Impact ◽  
The Mathematical Model

The paper presents one of the perspective directions of the development to modern aviation, which is connected with designing and producing unmanned aerial vehicles (UAV) of various functionalities for applying in both military and civilian spheres. The syntheses of UAV control systems, regardless of their type and purpose presumes creation of adequate mathematical models, first of all adequate aerodynamic mathematical models. In the paper results that forms and justify the aerodynamic mathematical model and as well as the results of building a general mathematical model of the longitudinal movement of the perspective UAV are presented. Also factors that forms the mathematical model on given aerodynamic, geometric, mass and inertial data for a hypothetical perspective altitude long-range UAV are submitted. Assessment of the impact of these data on the dynamic, temporal, and logarithmic frequency response UAV also has been given in this paper.

scholarly journals Mathematical Models of Satellite Communication Systems with Unmanned Aerial Vehicles and Counter-Means of Radio Control. Part 2

2019 ◽  
Vol 5 (4) ◽  
pp. 37-48
Author(s):  
A. Lomakin ◽  
D. Pantenkov ◽  
V. Sokolov
Keyword(s):  
Signal Processing ◽  
Unmanned Aerial Vehicles ◽  
Communication Systems ◽  
Information Transfer ◽  
Satellite Communication ◽  
System Development ◽  
Radio Channel ◽  
Radio Monitoring ◽  
Aerial Vehicles ◽  
Useful Signal

The article is devoted to the issues of stealth satellite radio channels with unmanned aerial vehicles (UAV) and it is consists of two parts. In the first part of this article the following questions are considered: the general statement of a system development problem of satellite model communication providing its stealth functioning by means of radio monitoring is carried out; the mathimatical apparatus for the assessing the effectiveness of ensuring spatial selectivity in the organization of satellite communication lines at hidden objects of their functioning is presented; the functioning model of the satellite communication system wich use the signal processing methods to ensure the secrecy of its functioning by means of radio monitoring is developed; in the conclusion, proposals and recommendations are formulated to ensure the secrecy of the satellite radio channel with unmanned aerial vehicles. Since the eventual opponent a priori lacks complete reliable information about the radio monitoring signal, the second part of the article considers the methods of quasi-optimal signal processing based on auto-and intercorrelation processing, which allows to obtain a significant energy gain and detect a useful signal even at a very low level of its power at the input. The use of autocorrelation signal processing devices significantly improves the efficiency of radio monitoring (RM), which is especially important in the case of negative ratios of useful signal power and noise at the input of autocorrelation signal processing devices. The main results of the second part of the article include: a mathematical functioning model of the opponent's RM means in the conditions of taking measures to ensure the information transfer secrecy, the parameters calculations results of the satellite system provided that it is hidden from the RM means.

scholarly journals Simulation of quadcopter flight altitude stabilization system

2020 ◽  
Vol 33 (02) ◽  
pp. 638-650
Author(s):  
Mikhail Yu. Babich ◽  
Mikhail M. Butaev ◽  
Dmitry V. Pashchenko ◽  
Alexey I. Martyshkin ◽  
Dmitry A. Trokoz
Keyword(s):  
Mathematical Model ◽  
Unmanned Aerial Vehicles ◽  
Control Algorithm ◽  
Angular Position ◽  
The Other ◽  
Practical Implementation ◽  
Stabilization System ◽  
Flight Altitude ◽  
Aerial Vehicles ◽  
Aerial Vehicle

Recently, unmanned aerial vehicles have been an important part of scientific research in various fields. Quadrocopter is an unmanned aerial vehicle with four rotors, two of which rotate clockwise, the other two counterclockwise. Changing the speed of screw rotation allows you to control the movement of the apparatus. The article proposed and tested a mathematical model of a quadcopter. They presented the development of a simple control algorithm that allows to stabilize the height and angular position. The research results show the efficiency of the algorithm and the possibility of its practical implementation. The developed mathematical model can be used instead of a real quadcopter, which will significantly reduce the time during research, as well as avoid the quadrocopter damage, reducing the number of launches.

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.

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