No. 5

Dosimetric complex «Tritel-B» for «Bion-M» № 2 satellite

The article describes the design features and main technical parameters of the new Russian dosimetric complex «Tritel-B» for measurement of the ionizing cosmic radiation characteristics on board «Bion-M» N2 satellite.

Keywords: dosimetry, ionizing radiation, nuclear instrumentation, space, «TRITEL-B», satellite «BION-M».

Software controller development of the real time coaxial sample surface tracking system during laser processing

This article describes the development of a software for a controller of real time coaxial sample surface tracking system during laser processing.

The article describes the details of the software development of a real-time coaxial tracking system of the controller for high precision laser micromachining. The coaxial tracking system controller must have high performance and flexibility in integration into the control system of a laser machine, so a SoC Xilinx ZYNQ) with an FPGA was chosen to implement such system.

During the process of sample surface tracking, the controller of coaxial tracking system needs to continuously acquire and filter the video stream data. The article describes the process of filtering an image using a sliding average filter and searching for a peak in the frame using specified parameters.

Keywords: coaxial tracking system, FPGA, System-on-Chip, ZYNQ, machine vision methods, video processing, FPGA image filtering, instrumentation technology, technological equipment, software package, laser.

New solutions for constructing sensitive elements of double spherical electric field strength sensors

New technical solutions have been proposed for constructing sensitive elements of double spherical electric field strength sensors with better metrological characteristics compared to known sensors. In the new design, the sensitive elements are made in the form of two separate parts, having the shape of a spherical segment and a spherical layer, the angular dimensions of which are specified by angles θ₁, θ₂ и θ₃. For the first time, an analytical relationship has been established between these angular dimensions and the error of the double sensor due to field inhomogeneity. The choice of combinations of angles θ₁, θ₂ и θ₃ made it possible to reduce this error several times. The mathematical modeling carried out revealed the six most suitable technical solutions, of which the best solutions have an error not exceeding ± 0,23 %.

Keywords: electric field, field strength, double spherical sensor, spherical sensor, sensitive element of a spherical sensor, error from field inhomogeneity, distance to the field source.

Application of the domestic modular platform for creating digital twins in an educational environment as a method of digital transformation

The advantages of digital solutions developed on the basis of a unique domestic modular platform for the creation and integration of digital twins by «ProgramLab» LLC are revealed. Software and hardware training systems of digital twins in various industries have been developed and implemented. A unique domestic platform for the creation and integration of digital twins of real-world objects «PLTwin» has been developed and is used to solve problems and reduce risks in the implementation of state programs for the digital transformation of society.

Keywords: digital twin, educational environment, digital transformation, information technology, virtual prototyping, virtual reality, three-dimensional models.

Fuzzing software using hardware acceleration

The paper discusses the methods of software fuzzing testing. Different classifications and examples of application of such a method in creating secure programs are given. Problems, efficiency issues and approaches to speeding up testing are investigated. The peculiarities of computing on the central and graphic processor and existing obstacles in creating a heterogeneous system for the considered scenarios are considered. Necessary conditions and constraints for dynamic phasing are formulated. The conclusion about the relevance and expediency of such direction for research is made.

Keywords: fuzzing, graphics processor, secure software, vulnerability search, error detection, dynamic fuzzing testing, parallel programming, pseudomutation, OpenCL, CUDA, Snap, Elbrus, AFL.

Using unmanned aerial vehicles to determine the angle of inclination of reinforced concrete supports of the overhead contact network

The article discusses a method for determining the critical values of the deviation angles of overhead contact network supports relative to the track profile using unmanned aerial vehicles and laser scanning rangefinders installed on them. The angle of inclination of each support is determined in three planes. For each plane, two projections are considered – parallel and perpendicular to the scanning plane, respectively.

Keywords: unmanned aerial vehicle, laser rangefinder, catenary support, tilt angle, rail track.

Multi-criteria optimization of the aircraft's flight speed at various stages of flight, taking into account the specified time and altitude restrictions

The solution of the problem of optimizing the airspeed of a modern passenger aircraft is considered in order to reduce direct operating costs, fuel consumption and increase the convenience of flight at the climb stage, taking into account the restrictions set by the air traffic control system in time and altitude. The multi-criteria problem is solved using a genetic algorithm that includes a homologous gene replacement operator that accelerates the convergence process of the genetic algorithm.

Keywords: optimization, genetic algorithm, airspeed, navigation system.

Determination of the refractive index when heating the latest domestic light-curing composites with a modern refractometric device

In this paper, the application of refractometric methods and tools for obtaining the optical properties of composite materials containing methacrylic monomers is considered. For the research of multicomponent composites, it is promising to use refractometric technologies that provide highly informative and highly accurate experimental data. The paper defines the purpose and sets the task of the study. The appearance of the measuring device and its technical characteristics are given. The dependences of the refractive index with increasing temperature were recorded, which made it possible to obtain the necessary data to find the temperature coefficient of the refractive index of the studied samples. The results of linear interpolation of n(T) are obtained and compared with experimental data.

Keywords: refractometer, refractive index, composite, temperature, prism, approximation confidence value, error.