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• DETERMINING THE NATURE OF PARAMETER CHANGES BASED ON THE ANALYSIS OF DYNAMICS RELATIVE TO THE SHAPE OF ITS VALUES SET IN REAL TIME

  S. I. Klevtsov

  2020-10-11

  Abstract ▼

  One of the important tasks of monitoring technical objects is the prevention of emergency
  situations. This task is associated with the implementation of a reliable and adequate assessment
  of the health of the object. The assessment of the object’s health is based on an analysis of the
  behavior of its controlled parameters in real time. Only then it will be relevant. A method for determining
  the nature of a parameter change based on an analysis of a sequence of special spatial
  graphical forms called Poincare graphs is proposed. The selected parameter should largely determine
  the operability of the controlled object. Charts are formed on the basis of the time series
  of the controlled parameter. A time window is selected that cuts the specified number of parameter
  values. A graph is plotted for each step of moving the window along the time series of the parameter.
  The transformation of the form of a given type is analyzed, which is superimposed on the totality of
  parameter values presented in the form of a graph. By changing the form parameters, a conclusion is
  drawn on the nature of the parameter changes. The paper shows the possibility of using Poincare
  graphs to track changes in the state of a technical object in real time. This takes into account the
  peculiarities of information retrieval from sensors. The assessment is implemented using a microprocessor
  module included in the monitoring system. The structure of a generalized one-factor model is
  also proposed, which tracks the change in the state of an object based on an analysis of Poincare
  graphs. The option of assessing the state of the object by comparing the characteristics of the graph
  with the criteria is given. The criteria are obtained after preliminary processing of a large array of
  data on the behavior of the controlled parameter. Each criterion value is associated with an expert
  assessment that determines the state of the object. The assessment allows you to determine the degree
  of operability of the facility and implement the necessary actions in case of danger.

• THE METHOD OF SOLVING THE PROBLEM OF THE DISTRIBUTION OF GOALS IN THE GROUP OF UAVS BY NETWORK-CENTRIC CONTROL SYSTEM

  I. А. Shipov

  2022-04-21

  Abstract ▼

  The aim of the work is to create a productive computing device for a strapdown inertial navigation
  system (SINS) of a ground-based robotic complex (RTC) on a domestic element base.
  A formal description of the typical sufficient functions performed by SINS is given and the basicprinciples of the algorithms are described from the point of view of the requirements for computing
  resources. A description of domestic microcontrollers available on the market and a comparison with
  the closest foreign analogue are given. The results of the prototyping carried out showed the fundamental
  possibility, but the low prospects of creating computing devices on a single microcontroller.
  In this regard, technical proposals were developed and implemented to increase the computing power
  by means of building the architecture of a multiprocessor computer. As a result, it was necessary
  to develop special approaches to the design of algorithms and software. The organization of distributed
  computing is one of the most optimal methods for ensuring the calculation of functioning algorithms.
  The introduction of additional microprocessors into the calculator circuit made it possible not
  only to increase the computing power, but also to introduce additional interfaces for interaction with
  both the consumer and primary information sensors. The proposed variant of the distribution of SINS
  operation algorithms made it possible to create a reserve for the development prospects and system
  scalability. The most resource-intensive algorithm is the calculation of inertial coordinates, implemented
  as an iterative calculation for determining the latitude component of the location. Also, the
  performance margin may allow the implementation of additional adaptive algorithms for filtering
  and processing data based on the results of testing and operation of a ground moving object.
  The choice of on-board exchange interface between controllers is substantiated and its practical
  application is described. The creation of a closed loop of information exchange made it possible to
  implement additional parallel calculations of secondary information and to calculate an autonomous
  reckoning of the object's location coordinates. The described technical solutions can be used in the
  design of embedded calculators for objects for various purposes operating on the basis of hard logic.
  As the main drawback of the presented approach to designing a calculator, one can designate a limited
  functionality when working with ROMs.

• SELECTION OF THE SENSOR CONVERSION CHARACTERISTIC MODEL FOR CONTROLLING THE ERROR IN THE MEASUREMENT OF PHYSICAL QUANTITIES

  S.I. Klevtsov

  2022-08-09

  Abstract ▼

  On the example of a pressure sensor, the problem of selecting a model and parameters of
  the conversion function of a microprocessor sensor is considered. The conversion function is
  based on a mathematical model that associates the electrical signal coming from the sensor's
  measuring transducer with the value of a physical quantity. The model of the conversion function
  of a microprocessor sensor must repeat the real spatial dependence of the electrical signal on the
  measured value and take into account the influence of external factors, such as temperature. Microprocessor
  sensors are used to measure the parameters of an object with a given accuracy. The
  main contribution to the measurement error is made by the inaccuracy of the approximation of the
  real transformation function by its model. The need to achieve the optimal level of parameter
  measurement error in the system, taking into account the complexity and cost of measurements,
  requires the control of the sensor error. For this purpose, various models and methods of approximation
  are presented. For efficient error control, a method of multi-segment spatial approximation
  based on models of linear or non-linear spatial elements is proposed. The error control procedure
  is formulated. The procedure for using the model of multi-segment spatial approximation
  of the transformation characteristic for pressure calculations taking into account the influence of
  temperature is based on the combined use of linear and non-linear spatial elements within the
  same model. The segment type selection procedure should begin with an assessment of the possibility
  of using a linear spatial element first, and if it is impossible to meet the accuracy requirements,
  an analysis of the use of a non-linear element. The method allows you to change the types
  and configuration of spatial elements and in this way influence the measurement error. The advantages
  of this approach are confirmed by the simulation results.