69 research outputs found
Software architecture for determining the measurement error of the part dimensions by the optical method
Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Π° Π°ΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ Π±Π΅ΡΠΊΠΎΠ½ΡΠ°ΠΊΡΠ½ΡΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ ΡΠ°Π·ΠΌΠ΅ΡΠΎΠ² ΠΈ ΠΎΠΏΠΈΡΠ°Π½ΠΎ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎΠ΅ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΠ΅, ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡΠ΅Π΅ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΡΡ ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΡΠΊΠ°ΠΆΠ΅Π½ΠΈΡ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΎΠ² ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ
Spatial Structure of Large-Scale Plasma Density Perturbations HF-Induced in the Ionospheric F<inf>2</inf> Region
Β© 2016 Springer Science+Business Media New YorkWe consider the experimental results obtained by studying the large-scale structure of the HF-disturbed ionospheric region. The experiments were performed using the SURA heating facility. The disturbed ionospheric region was sounded by signals radiated by GPS navigation satellite beacons as well as by signals of low-orbit satellites (radio tomography). The results of the experiments show that large-scale plasma density perturbations induced at altitudes higher than the F2 layer maximum can contribute significantly to the measured variations of the total electron density and can, with a certain arrangement of the reception points, be measured by the GPS sounding method
Spatial Structure of Large-Scale Plasma Density Perturbations HF-Induced in the Ionospheric F <inf>2</inf> Region
ΓΒ© 2016, Springer Science+Business Media New York.We consider the experimental results obtained by studying the large-scale structure of the HF-disturbed ionospheric region. The experiments were performed using the SURA heating facility. The disturbed ionospheric region was sounded by signals radiated by GPS navigation satellite beacons as well as by signals of low-orbit satellites (radio tomography). The results of the experiments show that large-scale plasma density perturbations induced at altitudes higher than the F2 layer maximum can contribute significantly to the measured variations of the total electron density and can, with a certain arrangement of the reception points, be measured by the GPS sounding method
The solution of wear-contact problems by means of electrical simulation
Π ΡΡΠ°ΡΡΡ ΡΠΎΠ·Π³Π»ΡΠ½ΡΡΠΎ ΡΡΡΠ½ΡΡΡΡ Π΅Π»Π΅ΠΊΡΡΠΎΡΡΠ°ΡΠΈΡΠ½ΠΎΡ Π°Π½Π°Π»ΠΎΠ³ΡΡ ΠΌΡΠΆ ΡΡΠ²Π½ΡΠ½Π½ΡΠΌΠΈ Π΅Π»Π΅ΠΊΡΡΠΎΡΡΠ°ΡΠΈΠΊΠΈ ΡΠ° ΡΠ΅ΠΎΡΡΡ ΠΏΡΡΠΆΠ½ΠΎΡΡΡ. ΠΠ° ΠΎΡΠ½ΠΎΠ²Ρ ΡΡΡΡ Π°Π½Π°Π»ΠΎΠ³ΡΡ Π·Π°ΠΏΡΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΎ ΡΠΏΠΎΡΡΠ± Π²ΠΈΡΡΡΠ΅Π½Π½Ρ Π·Π°Π΄Π°ΡΡ ΡΠΎΠ΄ΠΎ ΠΊΠΎΠ½ΡΠ°ΠΊΡΡ Π΄Π²ΠΎΡ
ΠΏΡΡΠΆΠ½ΠΈΡ
ΡΡΠ» Π· Π²ΡΠ°Ρ
ΡΠ²Π°Π½Π½ΡΠΌ Π·Π½ΠΎΡΡ Π·Π° Π΄ΠΎΠΏΠΎΠΌΠΎΠ³ΠΎΡ Π΅Π»Π΅ΠΊΡΡΠΈΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΡΠ²Π°Π½Π½Ρ Π· Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½ΡΠΌ ΠΊΠ²Π°Π·ΡΡΡΠ°ΡΡΠΎΠ½Π°ΡΠ½ΠΎΠ³ΠΎ Π΅Π»Π΅ΠΊΡΡΠΈΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ. ΠΠΈΡΡΡΠ΅Π½Π° Π·Π½ΠΎΡΠΎΠΊΠΎΠ½ΡΠ°ΠΊΡΠ½Π° Π·Π°Π΄Π°ΡΠ° ΡΠΎΠ΄ΠΎ ΡΠ±ΡΠ°ΡΡΠΎΠ³ΠΎ Π·Π°ΡΠ΅ΠΏΠ»Π΅Π½Π½Ρ. ΠΡΡΠΈΠΌΠ°Π½ΠΎ ΠΏΠ»ΠΎΡΠ°Π΄ΠΊΠΈ ΠΊΠΎΠ½ΡΠ°ΠΊΡΡ Π΄Π»Ρ ΡΡΠ·Π½ΠΈΡ
Π²Π°ΡΡΠ°Π½ΡΡΠ² ΠΊΠΎΠ½ΡΠ°ΠΊΡΡΠ²Π°Π½Π½Ρ Π·ΡΠ±ΡΠ² Π· ΠΏΠΎΡΠ°ΡΠΊΠΎΠ²ΠΈΠΌ ΡΠΎΡΠΊΠΎΠ²ΠΈΠΌ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠΎΠΌ. ΠΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½ΠΎ Π²ΠΏΠ»ΠΈΠ² Π·Π½ΠΎΡΡ ΠΊΠΎΠ½ΡΠ°ΠΊΡΡΡΡΠΈΡ
ΠΏΠΎΠ²Π΅ΡΡ
ΠΎΠ½Ρ Π½Π° ΡΠΎΠ·ΠΏΠΎΠ΄ΡΠ»Π΅Π½Π½Ρ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ½ΠΎΠ³ΠΎ ΡΠΈΡΠΊΡ. ΠΠΎΠ±ΡΠ΄ΠΎΠ²Π°Π½Ρ Π΅ΠΏΡΡΠΈ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ½ΠΎΠ³ΠΎ ΡΠΈΡΠΊΡ ΠΏΠΎ ΡΡΠ·Π½ΠΈΠΌ ΡΡΡΠ΅Π½Π½ΡΠΌ ΠΏΠ»ΠΎΡΠ°Π΄ΠΎΠΊ ΠΊΠΎΠ½ΡΠ°ΠΊΡΡ.Purpose. A great number of works in the field of contact interaction mechanics including those with account of the wear of contact surfaces, and the desire to take into consideration the factors even at the stage of designing elements of higher kinematic pairs proves the topicality of the problem under consideration. However, solving such problems by means of analytical and numeric methods is connected with the necessity to overcome considerable difficulties, and in some cases it is impossible. That is why other methods of solving them, and, in particular, with help of electrical simulation are of both scientific and practical interest.
Design/methodology/approach. The paper considers the essence of electrostatic analogy. It presents the way of solving 3D contact problems by means of electrical simulation based on the application of quasi-stationary electric field. It also presents the description of a special electrical simulation device made for solving the problems. The device enables to do experimental research and process obtained results automatically. It is shown that the accuracy of the results obtained in the experiments is enough for engineering
applications. Findings. The paper also presents the problem about point contact of gear teeth with account of wear. It shows the influence of contact surfaces wear on the distribution of contact pressures. It presents contact areas for different points of gearing. The diagrams of contact pressures on their different sections are given.
Originality/value. It is concluded that the solution of wear-contact problems enables to choose the best geometry of contact surfaces
of elements of higher kinematic pairs on the designing stage and get a considerable economic effect.Π ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½Π° ΡΡΡΠ½ΠΎΡΡΡ ΡΠ»Π΅ΠΊΡΡΠΎΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π°Π½Π°Π»ΠΎΠ³ΠΈΠΈ ΠΌΠ΅ΠΆΠ΄Ρ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡΠΌΠΈ ΡΠ»Π΅ΠΊΡΡΠΎΡΡΠ°ΡΠΈΠΊΠΈ ΠΈ ΡΠ΅ΠΎΡΠΈΠΈ ΡΠΏΡΡΠ³ΠΎΡΡΠΈ. ΠΠ° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΡΠΎΠΉ Π°Π½Π°Π»ΠΎΠ³ΠΈΠΈ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ ΡΠΏΠΎΡΠΎΠ± ΡΠ΅ΡΠ΅Π½ΠΈΡ Π·Π°Π΄Π°ΡΠΈ ΠΎ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ΅ Π΄Π²ΡΡ
ΡΠΏΡΡΠ³ΠΈΡ
ΡΠ΅Π» Ρ ΡΡΠ΅ΡΠΎΠΌ ΠΈΠ·Π½ΠΎΡΠ° Ρ ΠΏΠΎΠΌΠΎΡΡΡ ΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΊΠ²Π°Π·ΠΈΡΡΠ°ΡΠΈΠΎΠ½Π°ΡΠ½ΠΎΠ³ΠΎ ΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΠΎΠ»Ρ. Π Π΅ΡΠ΅Π½Π° ΠΈΠ·Π½ΠΎΡΠΎΠΊΠΎΠ½ΡΠ°ΠΊΡΠ½Π°Ρ Π·Π°Π΄Π°ΡΠ° ΠΏΡΠΈΠΌΠ΅Π½ΠΈΡΠ΅Π»ΡΠ½ΠΎ ΠΊ Π·ΡΠ±ΡΠ°ΡΠΎΠΌΡ Π·Π°ΡΠ΅ΠΏΠ»Π΅Π½ΠΈΡ. ΠΠΎΠ»ΡΡΠ΅Π½Ρ ΠΏΠ»ΠΎΡΠ°Π΄ΠΊΠΈ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ° Π΄Π»Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
Π²Π°ΡΠΈΠ°Π½ΡΠΎΠ² ΠΊΠΎΠ½ΡΠ°ΠΊΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π·ΡΠ±ΡΠ΅Π² Ρ ΠΏΠ΅ΡΠ²ΠΎΠ½Π°ΡΠ°Π»ΡΠ½ΠΎ ΡΠΎΡΠ΅ΡΠ½ΡΠΌ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠΎΠΌ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΈΠ·Π½ΠΎΡΠ° ΠΊΠΎΠ½ΡΠ°ΠΊΡΠΈΡΡΡΡΠΈΡ
ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ΅ΠΉ Π½Π° ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ½ΡΡ
Π΄Π°Π²Π»Π΅Π½ΠΈΠΉ. ΠΠΎΡΡΡΠΎΠ΅Π½Ρ ΡΠΏΡΡΡ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ½ΡΡ
Π΄Π°Π²Π»Π΅Π½ΠΈΠΉ ΠΏΠΎ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠΌ ΡΠ΅ΡΠ΅Π½ΠΈΡΠΌ ΠΏΠ»ΠΎΡΠ°Π΄ΠΎΠΊ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ°
Generation of Artificial Ionospheric Irregularities in the Midlatitude Ionosphere Modified by High-Power High-Frequency X-Mode Radio Waves
Β© 2014, Springer Science+Business Media New York. We consider the properties of the artificial ionospheric irregularities excited in the ionospheric F2 region modified by high-power high-frequency X-mode radio waves. It is shown that small-scale (decameter) irregularities are not generated in the midlatitude ionosphere. The intensity of irregularities with the scales lβ₯β50 m to 3 km is severalfold weaker compared with the case where the irregularities are excited by high-power O-mode radio waves. The intensity of the larger-scale irregularities is even stronger attenuated. It is found that the generation of large-scale (lβ₯ β5β10 km) artificial ionospheric irregularities is enhanced at the edge of the directivity pattern of a beam of high-power radio waves
Gyroharmonic features of the hf-induced ionospheric irregularities
Gyroharmonic features of the different-scale artificial plasma-density irregularities excited by HF modification of the ionospheric F2 region under conditions where the frequency of the O-mode pump wave is close to the fourth gyroharmonic frequency of electrons in the pump wave - plasma interaction region are considered. Β© 2012 Springer Science+Business Media New York
Anomalous attenuation of extraordinary waves in the ionosphere heating experiments
Multiple scattering of radio waves by artificial random irregularities
HF-induced in the ionosphere F region may cause significant attenuation of both
ordinary and extraordinary waves together with common anomalous absorption of
ordinary waves due to their non-linear conversion into plasma waves. To
demonstrate existence and strength of this effect, direct measurements of
attenuation of both powerful pump wave and weak probing waves of extraordinary
polarization have been carried out during an experimental campaign on September
6, 7 and 9, 1999 at the Sura heating facility. The attenuation magnitude of
extraordinary waves reaches of 1-10 dB over a background attenuation caused by
natural irregularities. It is interpreted in the paper on the base of the
theory of multiple scattering from the artificial random irregularities with
characteristic scale lengths of 0.1-1 km. Simple procedure for determining of
irregularity spectrum parameters from the measured attenuation of extraordinary
waves has been implemented and some conclusions about the artificial
irregularity formation have been obtained.Comment: 17 pages, 9 figure
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