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• DEVELOPMENT OF A QUEUING SYSTEM ON FPGA FOR PROCESSING ETHERNET PACKETS

  А. V. Mangushev, V.А. Zybin, I. D. Polukhin

  2023-08-14

  Abstract ▼

  A scheme for buffering Ethernet packets for hardware implementation of their processing
  based on FPGA has been developed. The scheme is designed at the RTL level in the System Verilog
  language in the Quartus II 13.1 development environment. Verification and modeling were
  carried out in the ModelSim Altera environment. An FPGA of the CycloneIV family, located on the
  A scheme for buffering Ethernet packets for hardware implementation of their processing based on
  FPGA has been developed. The scheme is designed at the RTL level in the System Verilog language
  in the Quartus II 13.1 development environment. Verification and modeling were carried
  out in the ModelSim Altera environment. An FPGA of the CycloneIV family, located on the
  DE2-115 debugging board, was chosen as the target platform. Particular attention is paid to data
  reception and transmission modules, as well as the implementation of a hardware queue (FIFO)
  with the possibility of changing its contents by the processing module. The scheme is parameterized,
  it allows you to change the queue depth at the expense of one parameter without making
  changes to other parts of the scheme. A feature of the scheme is the ability to add any hardware
  module that monitors, processes or encrypts network traffic. The MII interface is used for transmitting
  and receiving packets, which allows using any available physical layer chips for receiving
  and transmitting packets. The device allows you to easily change the input and output interface,
  which increases its versatility. The system does not use proprietary IP cores, which makes it as
  portable as possible to FPGAs from various manufacturers. The main feature of the scheme is the
  low delay between receiving and sending a packet, determined only by the parameters of the processing
  module. The results of the work can be applied during the design of devices that transmit
  data with preprocessing. For example, network equipment (switches, routers), monitoring and
  data collection systems.

• SPATIAL SEPARATION OF INFORMATION IN THE AIRCRAFT COMMUNICATION DEVICE

  V.N. Nosulenko, I.A. Basul, E.Y. Zybin, М.А. Lelikov

  2022-03-02

  Abstract ▼

  The article presents some results of research aimed at the design of human-machine interfaces,
  taking into account the multimodal nature of human perception, for use in the on-board
  equipment of an aircraft. In particular, we are talking about the possibility of a wider use of audio
  channels for input and output of information. The advantages of sound interfaces in relation to
  visual and tactile ones are, first of all, in the absence of the need for directed attention of the pilot,
  in the ability to create auditory objects in three-dimensional space and indicate the direction to
  several different objects at the same time. In the experiments, the possibilities of spatial separation
  of speech information flows in an aircraft intercom in situations where the level of interference
  significantly exceeded the level of the target speech message were tested. The indicators of target
  message recognition were evaluated in the presence of two types of sound interference: the sound of
  another speech message and the noise of an aircraft engine. The results showed that spatial separation
  of audio messages significantly improves the operator’s ability to recognize their content, regardless
  of the type of interference. The maximum number of errors when recognizing a target message
  corresponds to its spatial position in the same direction as the noise of the interference. At the
  same time, message recognition is significantly better if it is pronounced in a female voice. The fact of
  spatial asymmetry of correct recognitions was also revealed: messages arriving from the right are recognized better than in cases of their arrival from the left. The practical significance of the research
  concerns the possibility of creating intercom with increased security against conflicts between
  different information flows, as well as against the impact of external acoustic noise. The prospect is
  seen in the use of three-dimensional audio interfaces not only as part of an intercom, but also for
  navigation and aircraft control systems, as well as monitoring its state.

• AIRCRAFT FLIGHT PATH PREDICTION UNDER COMPLETE PARAMETRIC UNCERTAINTY

  V.V. Kosyanchuk, V.V. Glasov, E.Y. Zybin, Liguo Tan

  2021-04-04

  Abstract ▼

  Most of the methods for predicting the behavior of dynamic systems are based on the information
  about the parameters of their mathematical models. However, the problems of
  nonstationarity, nonlinearity and nonidentifiability of models of real complex systems lead to the
  fact that traditional parametric methods are applicable in practice only when the parameters and
  structure of models of systems are reliably known, and the uncertainties in the formulation of the
  problem are significantly limited. The article describes an original nonparametric method for
  predicting the aircraft flight path under absence of a priori information about the parameters of its
  mathematical flight dynamics model. The proposed method, unlike similar widely known ones,
  does not use logical or statistical calculations and does not require its preliminary training or
  long-term tuning. It is based only on the basis of a retrospective analysis of several sequential
  values of the spatial coordinates of the aircraft and its control signals, therefore it is not subject to
  model errors and can be used to predict the flight path of the aircraft under complete parametric
  uncertainty, even in the case of non-identifiability of its flight dynamics model. The results of numerical
  simulation of the solution to the problem of predicting the flight path of an unmanned
  aerial vehicle of the most common type of quadrocopter under complete uncertainty in parameters
  of its mathematical model are presented. The results obtained confirm the efficiency of the developed
  method and show high performances of the accuracy of solving the problem and the speed of
  tuning the algorithm. The described approach can be used to predict the motion path of any other
  vehicle (car, ship, etc.), if its model is linearizable over the observed time interval and there is
  information about its control signals. Practical implementation of the described nonparametric
  method together with traditional parametric ones will improve the accuracy of flight path predicting
  and solve the problem of high-precision landing of an unmanned aerial vehicle on an actively
  maneuvering ship, and specifically in the event of various critical situations.