The results of the development of modifications of the experimental model of the generator of test signals with rectangular spectra – cosine and sine equal-amplitude series, intended for automated measurement of frequency characteristics of filters in the audio and infrasound ranges are presented. In the modifications of circuit of the layout, two versions of microcontrollers are used – STM32L073 and STM32F407. Approaches to the development of individual system blocks – matching amplifiers, as well as to the correction of gross distortions of the transfer characteristics of digital-to-analog converters built into the microcontroller are shown. An assessment of the distortions of the rectangularity of the spectrum of the generated series was performed.

Keywords: automated meter, frequency response meter, rectangular spectrum, equal-amplitude cosine series, equal-amplitude sine series, transfer characteristic correction, digital-to-analog converter.

The present work is devoted to the use of an interference tomographic probe to obtain information at a certain depth on optical inhomogeneities of microoptical elements. The successes achieved in microelectronics and micro-optics lead to the miniaturization of elements of optotechnical devices and complexes, therefore, the study of micro-components using an optical tomographic probe is relevant and promising. The paper sets the purpose and objective of the study, as well as provides a functional diagram of the measuring system. The depth distribution of the reflection coefficient is obtained and the luminosity for microoptical elements is determined.

Keywords: optical inhomogeneity, microinterference method, micro optics, measurement accuracy, depth of analysis, microlenses.

The article is devoted to the comparison of two integration schemes of a strapdown inertial (SINS) and satellite (GNSS) navigation systems used in on-board flight navigation complexes of an aircraft. The research methodology is based on a comparative analysis of the results simulation with the controlled introduction of SINS sensor failures into the model. At the same time, the influence of the logic structure of data processing of information flows on the accuracy, stability and fault tolerance of the navigation solution is evaluated. Special attention is paid to analyzing the behavior of various schemes in critical scenarios in case of failure of individual components of the SINS and evaluating the computational efficiency of the algorithms used. The analysis of the simulation results makes it possible to identify the features of each of the considered integration schemes, which is relevant when choosing the architecture of the projected flight control and navigation complexes of various aircraft, including unmanned ones, designed for flights in harsh conditions of the operational environment of Area navigation.

Keywords: strapdown inertial navigation system, SINS, Global Navigation Satellite System, GNSS, integration, algorithm, modeling.

The work is devoted to the development of algorithmic and software vision systems for automated control of surface defects of rolled products, implementing the method of laser triangulation. To detect and determine the geometric parameters of volumetric defects of the rolled surface, an algorithm for constructing and analyzing a three-dimensional surface depth map is proposed, providing for the implementation of filtration, contouring, and mathematical image processing procedures. To detect and classify the type of defects on the rolled surface, an algorithm for constructing and analyzing a two-dimensional intensity map of the rolled surface is proposed, which implements segmentation algorithms and neural networks to localize rolled defects of various origins. To increase the reliability of defect detection results, an algorithm for combined analysis of a three-dimensional depth map and a two-dimensional surface intensity map has been developed and implemented in software. The results of testing and experimental approbation of the developed algorithms and software are presented.

Keywords: дsurface defects, detection, classification, geometric parameters, rolled products, vision systems, laser triangulation system, depth map, intensity map, combined analysis.

The paper presents a comprehensive analysis of wafer bonding methods, which allows for simultaneous packaging of dozens of microsystem technology devices with a significant reduction in time and material costs compared to standard methods. A classification has been developed and a comparative table of characteristics of each type of bond has been compiled, which simplifies the selection of the type of process. The features of using getters to maintain the required operating pressure in the cavities of the devices being created are investigated. The considered bonding methods are also widely used in photonic integrated circuits, microfluidic devices, which significantly expands the scope of their practical use.

Keywords: packaging, MEMS, PIC, microsystem engineering, direct bonding, bonding with intermediate layers, getters, activation.

The state of health depends on the diagnosis, which in turn depends on the reliability of the obtained test results. Reference materials of pathogenic biological agents (PBA) are a means of metrological support for the identification and measurement of PBA content, and the ability to detect a disease at the very beginning of its occurrence depends on their availability. The presented reference materials allow obtaining accurate measurement results using verified and calibrated measuring instruments, which in turn leads to an improvement in the quality of life.

Keywords: quality of life, reference materials, measurement procedures, pathogenic biological agents.

In this paper, a study was conducted in the part of the influence of the parameters of the impact transducer, including the mass and radius of the tip (indenter) of the striker, as well as the impact speed on the results of evaluation the mechanical properties using the dynamic instrumented indentation test. Experimental data and calculated values of hardness and elastic modulus obtained on a sample of grade 20Cr25Ni20C2 steel are presented. The dependences of the calculated values of hardness and elastic modulus are determined with deviations from the nominal mass of the striker, the indenter radius and the impact velocity. It is shown that the calculated values of mechanical characteristics can change by more than 13 % with a deviation of the striker parameters from the nominal values by 10 %.

Keywords: dynamic instrumented indentation, indenter, hardness, elastic modulus.