UDC 629.3.083 BBK 39.0163
The author considers a methodology of integrated approach to the rationale and implementation of recommendations on aircraft reliability with the use of Pareto chart.
Key words: flight safety; aircraft; reliability; failure; fault; Pareto chart.
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UDC 629.7.015.4 BBK 39.52
The article demonstrates the results of experimental research of fracture kinetics for samples made of VT-20 titanium sheets under alternate stresses and at elevated temperatures. Dependences of crack growth rate on load parameters are obtained. The mechanism of regarding the influence of temperature and load non-stationarity on VT-20 fracture kinetics is proposed.
Keywords: kinetics, creep, crack, supersonic transport airplane, SST, titanium alloy.
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UDC 629.7 BBK 39.56
The presented mathematical model is based on complexation and evaluation of heterogeneous flight parameters which are registered by data recorders or other concentrators that provide their post-flight processing by linear discrete Kalman filtering algorithms. The presented materials are based on previously obtained scientific results and are a continuation of the paper published in IIAJ «Crede Experto: transport, society, education, language» (2017, № 2, p. 115–125).
Key words: complexation, error estimation, control, controlled state, diagnostic sign, seminatural experiment.
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UDC 004.588 BBK 74.5
Safarbakov A. M., Hodackij S. A.
The article describes methodology of solving an optimization problem on choice of the main performances of a pulse-type combustion chamber. The system elements were considered. The authors demonstrate how to choose the criterion which provides evaluation of performances of the system or its model to figure out “the best” model or a set of “the best” conditions for system operation. The choice of an optimization method was demonstrated and the results of solving the optimization problem are provided.
Keywords: optimization, mathematical model, criterion, limitations, algorithm.
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UDC 621.396.96 BBK 32.842
Hmarskij P. A., Rodriguez D., Solovov A. I.
The article focuses on the principles of construction of the developed hardware-software simulator for primary radar signals of the control radar. The use of the proposed hardware simulator within a dispatching radar will significantly improve its competitiveness due to the possibility of realization of the modes of research and implementation of existing and future algorithms for radar information processing.
Keywords: control radar, hardware and software system, the generator of trajectories, noise shaper, designer of radar objects.
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UDC 621.372 BBK 39.56
The article discusses synthesis of optimal filters for random spatial signals based on multi-layer optical structures running in the corner filtering mode.
Key words: corner filtering; synthesis; optical structure.
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UDC 531.383 BBK 32.816я431(2Рос)
The article presents a control algorithm for the servo drives of the gyro stabilized platform for unmanned aircraft vehicle (PUAV) for aerial photography and surveillance on the basis of the data from the 3-axis accelerometer and gyroscope located on the body of the UAV. The implementation of the algorithm using the servo SG90 with a programmable Arduino UNO hardware platform is reviewed.
Keywords: unmanned aircraft vehicle, gyro stabilized platform, micromechanical accelerometer, micromechanical gyroscope.
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UDC 629.7.036.3 BBK 22.21
The author considers peculiarities of interference of a gyro rotor (of a GTE and others) in the field of the daily rotation of the Earth taking into account the azimuth orientation of its axis of rotation in horizontal plane. The azimuthal characteristic of gyro rotor rundown is given. The author points out the necessity to correct the controlled rotor rundown time at GTE shutdown on the ground.
Key words: gyro rotor, rotor rundown, the theory of spinning tops, the field of the daily rotation of the Earth, the azimuthal characteristic of rotor, air mass transport.
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UDC 525.7 BBK 9.15
Danilenko N. V., Kirenchev A. G.
The article considers the issue of vortex formation of local gravity flows generated by an anthropogenic outflow (GTE operation on the ground). The vortex classification is analyzed and experimental research ways are determined. The authors suggest conditions for experimental research of vortices influenced by Coriolis force, vortex pairs of air intake case / underlying terrain interference, and a circular vortex of gravity flow / ground interference. The composite design peculiarities of the test installation for researching the vortex range are described.
Key words: local gravity flow, air intake vortices, vortex classification, process of vortex formation, vortex conversion.
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UDC 629.7 BBK 39.56
Shejnikov A. A., Belegov A. N., Rozhok A. V.
The authors developed a diagnostic relation which, when applied in measurement data processing algorithms of test diagnostic systems of the windings of aeronautic electrical machines, avoids the need to store statistic information about the operational parameters of fault-free and faulty windings thus promoting validity and simplification of the diagnostics technique.
Key words: windings of aeronautic electrical machines, test diagnostics, travelling-wave method.
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