Authors

Keywords:

tropospheric communication, tropospheric communication stations, blind adaptation algorithm, sequential evaluation adaptation algorithm

Abstract:

Control of operating modes of radio facilities is one of the important ways to increase the efficiency of the functioning of communication systems interacting with a non - stationary environment. To increase the throughput of radio lines, algorithms for controlling the parameters of signal and data processing devices are investigated, developed and used both at the physical and channel levels of data transmission systems. At the same time, the issues of controlling the algorithms for the formation and reception of signals in tropospheric communication lines have been insufficiently studied. The article discusses the conditions for choosing the adaptation algorithm for the operating frequency, based on the estimate of the loss of the information exchange rate for the «blind» adaptation algorithm and for the adaptation algorithm with a sequential estimate of the operating frequencies.

Pages  3-8

UDK:  621.396.9

Authors

Keywords:

radio monitoring, radio source locations, angular bearing error, fading, m - distribution, VHF range

Abstract:

The article proposes a model for estimating the error in determining the location of a radio source as an object of radio monitoring in the VHF range. It is possible to evaluate the accuracy of finding the communication object from the depth of fading of the received signal according to the generalized Nakagami law and the relative location of the monitored objects by the communication security control post when exposed to extraneous radio sources. The model allows us to judge an increase in the accuracy of determining the location of monitoring objects from the angular bearing error, which significantly increases the timeliness of radio monitoring and the reliability of received information from radio sources in a complex signal - interference environment.

Pages  9-13

UDK:  004.056.53

Authors

Keywords:

low - flying target, radar stations of detection, false alarm probability, guaranteed range of detection, facilities of electronic warfare (EW), model of interference situation

Abstract:

In modern conditions, a likely enemy ability to strike the blows to low - flying targets (LFT) simultaneously from several directions, the high intensity of the attacks and the extremely low flight altitudes of the small maneuvering targets (LFT) create great difficulties for their detection by the facilities of navy ships. The article considers an algorithm for guaranteed range determination of detection of low - flying targets (LFT) by radar stations of surface ship detection. The task is solved taking into account the degree of the readiness and operation modes of the detection radar station, characteristics of the LFT, characteristics of the radar observability, application of the various kinds of interference by the enemy.

Pages  14-20

UDK:  623.765.4

Authors

Keywords:

force - torque sensing, control system, feedback, feedback control

Abstract:

This article discusses the problems and features of the manipulator gripper sensitivity. Three methods of controlling such devices using information about forces are identified. Based on the considered methods, the optimal method for controlling small - sized manipulators has been selected. Structural schemes of the manipulator control system have been developed to control the force of the gripper and to control the forces in manipulator’s joints. Consequently, a simple mathematical model of the manipulator gripper control using force - torque sensing has been built using the MATLAB Simulink environment, which is a combination of the mechanical part (gripper design), sensing system (blocks for determining the contact situation) and control system (desired values and controller).

Pages  21-27

UDK:  621.865.8; 004.896.621

Authors

Keywords:

a complex object, the backup copy

Abstract:

Complex technological systems that use the resources of cyberspace are subjected to a variety of coordinated impacts on them by both organized hacker communities and cyberterrorists. In part, the impacts are aimed at transferring complex technological systems to critical (off - critical) modes of operation, due to changes in the conditions and parameters of the operation of the object. This makes it necessary to create backups of a complex object, for its subsequent operational recovery. Existing approaches to creating backups of a complex object require a lot of computing power, data storage, and time, which negatively affects the operation of the system. This article discusses how to create a backup copy of a complex object. The proposed method allows you to reduce the cost of computing power, RAM, data storage, and time to create a backup copy of the state of a complex object.

Pages  28-35

UDK:  007

Authors

Keywords:

unmanned aerial vehicle, decision support system, neural network, situational model, group management

Abstract:

The article discusses the process of forming management decisions for the correct operation of a grouping of unmanned aerial vehicles (UAVs) in a rapidly changing environment. A neural network (NN) is used as a regulator, which is a perceptron with two intermediate, one input and one output layers. The training of the constructed neural network is carried out according to an algorithm that combines the ideas of the conjugate gradient method with quasi-Newtonian methods, and in particular, uses the approach implemented in the Levenberg-Marquardt algorithm. As input parameters for the construction of the control system, various types of situations are used, in which the «leading» UAV has to make decisions.

Pages  36-45

UDK:  62-50

Authors

Keywords:

automated special - purpose system, automated control system, computer system, computing process, multigraph

Abstract:

Currently, research on the main aspects of the theory and practice of organizing processes for harmonizing the structure of the computing process with the evolving functional structure of the tasks of automated special - purpose control systems in the process of their functioning is an urgent scientific task. Distributed solution of the problem of computational process control, provides the possibility of adapting several scenarios of calculations on parallel or distributed computing systems, which ensures the required speed of operation of automated special - purpose control systems. This work is devoted to the development of a model for the functioning of a computer system of automated special - purpose control systems.

Pages  46-51

UDK:  004.042

Authors

Keywords:

roller bearing wheel, mecanum platform, numerical software control

Abstract:

This article discusses the design features of the omni - directional platform propulsion system. The state of modern methods and methods of production of mecanum wheels is analyzed, and a new method of creating such wheels is proposed. The paper describes in detail the design of the proposed solution, and describes the method of production of the components of the product. In addition, a static calculation was performed on the strength of the designed components of the wheel structure. The paper also presents the results of prototyping this wheel using additive technologies, and demonstrates the layout of the platform on which the wheels are installed, the developed configuration.

Pages  52-59

UDK:  62-254.3

Authors

Keywords:

floating vehicle, water barrier, shallow water, access to the shore, passability, mathematical model, probability

Abstract:

The article proposes a mathematical model of the process of a floating vehicle leaving the water to the shore. At the same time, the probability of a floating vehicle not getting stuck was taken as an estimated indicator. The adopted indicator is in good agreement with the complex estimated indicators of the mobility and combat effectiveness of amphibious vehicles. The proposed mathematical model can be used to develop a technique for assessing the passability of floating vehicles when overcoming water obstacles. The application of this technique will allow for a quantitative assessment of the passability of existing machines, as well as samples floating vehicle at the stage of their design, and thereby reduce the financial costs of carrying out full - scale tests.

Pages  60-67

UDK:  623.438.7

Authors

Keywords:

«mini - missile», attacking munition, protective munition, warhead, striking elements, impact core

Abstract:

The problem of protection of mobile objects from portable weapons of destruction by guided and unguided small - caliber missiles from standard launchers is considered. The article provides information about the adoption of «mini - miss iles» in the armies of foreign countries. An approximate method for calculating the mass and size characteristics of small - caliber missiles equipped with directional warheads is proposed. Examples of calculation are given.

Pages  68-75

UDK:  623.46; 629.7; 623.946.082

Authors

Keywords:

simulation, communication network, network stability, diagnostic, technical structure, technical operation, communication network readiness

Abstract:

The article considers the simulation method of the processes of communication network functionality taking into account the impact of destabilizing factors due to the preemptive reconfiguration. The reconfiguration solution is made based on analysis and processing of data of quality indicators of equipment (on technical basis), and it is applied at physical, channel, network levels with the determination of optimal parameters of equipment. Scientific - methodological support, presented here, is the basis for the development of approach and scientific and technical proposals to identify technical requirements for equipment functioning at the physical level in planning and deployment of the communication network. The method can be used in the study of quality characteristics of the equipment used on the communication network, as well as when determining the properties of the network stability.

Pages  76-84

UDK:  629.76.95

Authors

Keywords:

security threat, complex security, control point, shift on duty, organizational and staff structure, video monitoring operator, information and communication system

Abstract:

The comprehensive definition of security, disclosed the contents of dozens of civilians in the areas of managing complex security, emphasized the need for a method of determining a nominal number of control points integrated security and mission techniques. The algorithm of determination of staff numbers of control points integrated security, formed the mathematical model of calculation of a piece of time and norms the number of the duty shift of control points integrated security, specify the source dannie for the study of the structures and staffing of control points integrated security, including officials who carry out organizational - planned activities, monitoring and equipment information and communication systems.

Pages  85-90

UDK:  614.8