Using numerical experiment one-dimensional unsteady processes of heterogeneous combustion in porous object under free convection in horizontal case have been investigated and compared with vertical case. It is shown t...
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In this paper, new approach for synthesis of the diagnostic system for navigation sensors of underwater vehicles (UVs) is developed and investigated. Proposed system is synthesized by using kinematic model of UVs and ...
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In this paper, new approach for synthesis of the diagnostic system for navigation sensors of underwater vehicles (UVs) is developed and investigated. Proposed system is synthesized by using kinematic model of UVs and data fusion of sensors signals. The advantage of this approach is that it allows detecting and isolating faults in sensors of UVs at performance of underwater missions in unknown environment with unknown external disturbances. The results of performed simulation have completely confirmed the working capacity and high quality of the proposed approach.
This paper presents the new advanced approach for automatization of machining of nonrigid composites parts that have arbitrary geometrical form. This approach is based on using multilink manipulators with stereo visio...
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This paper presents the new advanced approach for automatization of machining of nonrigid composites parts that have arbitrary geometrical form. This approach is based on using multilink manipulators with stereo vision system and allows not using the expensive individual equipment for parts rigid fixing before processing. This is achieved by special intelligent formation and correction of program's motions of manipulator cutting tool in real time using information about current position of processed parts from vision system. The results of performed simulations have completely confirmed the working capacity and high quality of the proposed approach.
Optimization of growth parameters has permitted to create monolithic nanocomposites with buried nanocrystallites (NCs) of iron and chromium disilicides, polycrystalline nanocomposites with buried Mg2Si NCs and epitaxi...
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The paper presents the results of studies the deformation behavior of aluminium alloy D16 by acoustic emission(AE) methodThe purpose of this study was to establish the deformation stages and deformation mechanisms at ...
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The paper presents the results of studies the deformation behavior of aluminium alloy D16 by acoustic emission(AE) methodThe purpose of this study was to establish the deformation stages and deformation mechanisms at each stageStudies were carried out on the samples of aluminum alloy D16(analog 7075)This paper contains a method for the separation of AE signalsThe method of AE sources identification based on the the two-parameter distribution analysis(frequency parameter Kfvs energy of AE signals)The frequency parameter Kf is based on wavelet transform of AE signalsTwo-parameter distribution allows one to separate the AE signals emitted by dislocations from the signals of micro cracksThe investigation results allowed the various deformation stages to establish by the different types of AE signalsBy the AE analysis shows the dislocation mechanism of hardening the aluminum alloy D16The paper presents the results that characterize the influences of heat treatment and structural condition of aluminum alloy on the AE parameters.
New method for express measuring of optical material refractive index for plane-parallel samples or optical elements is proposed and *** method is based on using laser beam profiler for measurement of laser beam displ...
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New method for express measuring of optical material refractive index for plane-parallel samples or optical elements is proposed and *** method is based on using laser beam profiler for measurement of laser beam displacement caused by its refraction in a sample of known *** developed method was used to measure the refractive index of gallium nitride in VIS spectral range at wavelengths 470,561 and 633 *** technique provides a refractive index measurement with *** of the measurement procedures allows one to perform it in express way.
In this paper the method of identification of underwater vehicle (UV) mathematical model parameters is offered. This method allows providing the limited set of UV onboard sensors and has acceptable complexity for usin...
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This paper presents the synthesis method of an effective fault tolerant control system for actuators of manipulators which are described by nonlinear differential equations with variable parameters. This system ensure...
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The Si(111)2×2-In reconstruction can be considered as a precursor phase for the formation of the metallic 7×3 phases of In overlayers on a Si(111) surface. Using the ab initio random structure searching meth...
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The Si(111)2×2-In reconstruction can be considered as a precursor phase for the formation of the metallic 7×3 phases of In overlayers on a Si(111) surface. Using the ab initio random structure searching method, comparison of simulated and experimental scanning tunneling microscopy images, and resemblance of the calculated band structure to the experimental angle-resolved photoelectron spectra, we examined various 2×2 structure models with 0.5, 0.75, 1.0, and 1.25 monolayer In coverage. The only model which fits well all the requirements is the one-monolayer model, where three In atoms in the T4 sites form a trimer centered in the H3 site and the fourth In atom occupies the on-top (T1) site.
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