DSpace Collection:https://er.nau.edu.ua/handle/NAU/104502024-03-29T11:44:02Z2024-03-29T11:44:02ZAssessing the operator’s readiness to perform tasks of controlling by the unmanned aerial platformsКучеров, ДмитроKucherov, DmytroКучеров, ДмитрийКучеров, Дмитрий Павловичhttps://er.nau.edu.ua/handle/NAU/441432021-06-02T18:10:38Z2020-08-09T00:00:00ZTitle: Assessing the operator’s readiness to perform tasks of controlling by the unmanned aerial platforms
Authors: Кучеров, Дмитро; Kucherov, Dmytro; Кучеров, Дмитрий; Кучеров, Дмитрий Павлович
Abstract: Together with the intensity of development in the field of technology of unmanned platforms and their effective use for solving various tasks of peacetime and war, the requirements for the training of the operator managing the platform also increase. This fully applies to personnel providing the flight of manned means.Nevertheless, there are significant differences inthe requirement of operator preparedness for an unmanned platform.This is, first of all, control in conditions of remoteness from an unmanned platform, orientation on the display of the control panel, delays in the passage of information, and possibly a complete loss of communication.In such conditions, the requirements for the reaction time of the operator increase,he must also have the ability to anticipate the development of the situation, be able to work with available equipment for a long time.These and severalother criteria determine the general criterion of operator productivity, which is introduced in the work.The productivity criterion is a linear convolution function of particular criteria with some weighting factors, the exact values of which are unknown.A detailed analysis of particular criteria made it possible to establish their inconsistency and heterogeneity.The article proposes an approach that allows us to eliminate the inconsistency of local criteria by separately calculating weight coefficientsfor each part based on the hierarchy analysis method.The basic properties of the proposed approach are also given; modeling confirms the correctness of the solutions.This approach can be useful inthecertification of operators of various fields of activity.2020-08-09T00:00:00ZProtection of information networks based on LoRa technologyKucherov, D.P.Kucherov, DmytroКучеров, Д.П.Кучеров, Дмитрий Павловиhttps://er.nau.edu.ua/handle/NAU/379872020-08-13T07:22:24Z2019-02-20T00:00:00ZTitle: Protection of information networks based on LoRa technology
Authors: Kucherov, D.P.; Kucherov, Dmytro; Кучеров, Д.П.; Кучеров, Дмитрий Павлови
Abstract: The paper deals with modern technology for transmitting short messages
over long distances named LoRa, where the transmitted signal uses linear
frequency modulation (chirp). The object of the study to define lack of transmitters
that it has a design on LoRa technology for assessment their applicable in
condition urban city where there are a lot of radiation sources. The goal of the
work is the creation of a method of assessing the act the interference conditions
that based on measurement bit error rate and signal-noise ratio and via on which
to get individual host vulnerability levels. The processing of these signals is carried
out by means of a time-frequency transformation. The chirp signal is characterized
by 4 parameters: frequencies, time, modulation rate and amplitude.
By analogy with the wavelet transform, the processing of chirp signals involves
a chirplet decomposition. Since the chirp signals are strongly influenced by mutual
interference due to multipath, the article studies the effectiveness of LoRa
technology in conditions of mutual interference of radiation sources. The developed
method utilized chirplet decomposition and retrieve symbols of a message
in the dictionary. The conducted experiments have confirmed the proposed
software operability and allow recommending it for use in practice for solving
the problems receiving signal. The prospects for further research may include
the creation of parallel methods for calculation of the set of proposed indicators,
the improvement of software, as well as an experimental study of proposed indicators
in real conditions.
Description: The paper deals with modern technology for transmitting short messages
over long distances named LoRa, where the transmitted signal uses linear
frequency modulation (chirp). The object of the study to define lack of transmitters
that it has a design on LoRa technology for assessment their applicable in
condition urban city where there are a lot of radiation sources. The goal of the
work is the creation of a method of assessing the act the interference conditions
that based on measurement bit error rate and signal-noise ratio and via on which
to get individual host vulnerability levels. The processing of these signals is carried
out by means of a time-frequency transformation. The chirp signal is characterized
by 4 parameters: frequencies, time, modulation rate and amplitude.
By analogy with the wavelet transform, the processing of chirp signals involves
a chirplet decomposition. Since the chirp signals are strongly influenced by mutual
interference due to multipath, the article studies the effectiveness of LoRa
technology in conditions of mutual interference of radiation sources. The developed
method utilized chirplet decomposition and retrieve symbols of a message
in the dictionary. The conducted experiments have confirmed the proposed
software operability and allow recommending it for use in practice for solving
the problems receiving signal. The prospects for further research may include
the creation of parallel methods for calculation of the set of proposed indicators,
the improvement of software, as well as an experimental study of proposed indicators
in real conditions.2019-02-20T00:00:00ZDetection of Signals from a LoRa System Under Interference ConditionsKucherov, DmytroKucherov, D.P.Кучеров, Д.П.Кучеров, ДмитроКучеров, ДмитрийКучеров, Дмитрий Павловичhttps://er.nau.edu.ua/handle/NAU/377282021-03-23T12:47:53Z2018-10-02T00:00:00ZTitle: Detection of Signals from a LoRa System Under Interference Conditions
Authors: Kucherov, Dmytro; Kucherov, D.P.; Кучеров, Д.П.; Кучеров, Дмитро; Кучеров, Дмитрий; Кучеров, Дмитрий Павлович
Abstract: The paper examines the factors that affect the detection of signals in devices using modern LoRa technology to exchange information between devices that are part of the Internet of things in an interference environment. Features LoRa technology is a long range of information exchange in comparison with similar technologies, which is achieved through the spreading spectrum, the transmission of information in short packages and suppression of multipath signal propagation. The article notes the contribution of each factor to the quality of reception and studies the reception of the messages at the LoRa technology in a city with the significant interference that created by means of cellular communication and Wi-Fi devices.
Description: The paper examines the factors that affect the detection of signals in devices using modern LoRa technology to exchange information between devices that are part of the Internet of things in an interference environment. Features LoRa technology is a long range of information exchange in comparison with similar technologies, which is achieved through the spreading spectrum, the transmission of information in short packages and suppression of multipath signal propagation. The article notes the contribution of each factor to the quality of reception and studies the reception of the messages at the LoRa technology in a city with the significant interference that created by means of cellular communication and Wi-Fi devices.2018-10-02T00:00:00ZControl of Information Stream for Group of UAVs in Conditions Lost Packages or OverloadingKucherov, DmytroKucherov, Dmytro P.Кучеров, ДмитроКучеров, Д.П.Кучеров, Дмитрий Павлвичhttps://er.nau.edu.ua/handle/NAU/376212021-02-15T09:49:34Z2019-01-16T00:00:00ZTitle: Control of Information Stream for Group of UAVs in Conditions Lost Packages or Overloading
Authors: Kucherov, Dmytro; Kucherov, Dmytro P.; Кучеров, Дмитро; Кучеров, Д.П.; Кучеров, Дмитрий Павлвич
Abstract: The chapter deals with the problem of controlling the flow of information coming from a group of unmanned air vehicles (UAVs) by radio channel. The stream is a sequence of binary information packages. The inevitable data losses are compensated by repetition of lost packages or reconfiguration network. Modern methods control of data flow assumes using a mechanism ARQ based on the method sliding window. The consequence of these problems is a partial or total loss of its performance, manifested in a decrease in the network's starting throughput. Part of the problem of restoring the network is solved by routing mechanisms, which lead to a reconfiguration of the network due to the elimination of faulty nodes. Management of computer network overload is solved by well-known routing protocols, such as OSPF, IS-IS, RIP, and others. In solving the problem, the representation of the output of individual nodes of the network using the "death and reproduce" scheme was used substantially. This scheme of network operation presupposes its representation by the Markov chain and the derivation of probabilistic characteristics by solving the Kolmogorov equations.
Description: The chapter deals with the problem of controlling the flow of information coming from a group of unmanned air vehicles (UAVs) by radio channel. The stream is a sequence of binary information packages. The inevitable data losses are compensated by repetition of lost packages or reconfiguration network. Modern methods control of data flow assumes using a mechanism ARQ based on the method sliding window. The consequence of these problems is a partial or total loss of its performance, manifested in a decrease in the network's starting throughput. Part of the problem of restoring the network is solved by routing mechanisms, which lead to a reconfiguration of the network due to the elimination of faulty nodes. Management of computer network overload is solved by well-known routing protocols, such as OSPF, IS-IS, RIP, and others. In solving the problem, the representation of the output of individual nodes of the network using the "death and reproduce" scheme was used substantially. This scheme of network operation presupposes its representation by the Markov chain and the derivation of probabilistic characteristics by solving the Kolmogorov equations.2019-01-16T00:00:00Z