Категория: Aeronautics

The influence of a crew information support level on safety flights

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UDC 004.588 BBK 74.5

Karavaev Yu. A., Khodatskiy S. A.

The article formulates general approaches to the impact assessing algorithm formation of the crew information support level at the stage of landing gear failures localization on safety flights. The possibility of using these algorithms to assess the functional efficiency of the crew in the process of various aircraft systems failures compensating is shown through the specific flight incidents examples.

Keywords: safety, crew information support, failure localization, a special case.

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Promising fasteners for aircraft structures of carbon composites

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UDC 629.7.015.4.023 BBK 39.48

Sazhin N. A., Sazhin A. N.

The authors consider benefits and drawbacks of existing (traditional) fasteners (metal rivets) for airframes built with application of carbon composites.  Schematic designs of promising patented fasteners (PCM rivets) and patented technologies of their mounting in aircraft structures, experimental full-size designs of the fasteners of polymeric composite materials (carbon composites) providing improvement of their mounting are given. 

Key words: fasteners, mounting, rivet, carbon composite, polymeric composite material, blind riveting, aircraft structures.

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Signal demodulation for the secondary radar channel of ADS–B system

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UDC 621.396.74 BBK 39.571.5

Lezhankin B. V., Mezhetov M. A., Turincev S. V.

Aircraft flight safety is largely dependent on the performance of systems having various purposes. One of the systems is ADS-B intended for air traffic management by constructing trajectories of aircraft motion with efficient use of airspace. The analysis of main methods of designing the equipment, demodulating and decoding the signals in data links is therefore a relevant objective which can increase the efficiency of air transportation at the required level of flight safety.   

Key words: ADS-B, systems of symbol synchronization, quadrature demodulator, quadrature signal, hardware-software receiver, preamble detector.

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Use of Pareto chart for developing recommendations on aircraft reliability

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UDC 629.3.083 BBK 39.0163

Barsukov A. G.

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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Kinetics of creep fracture of vt-20 titanium planar samples

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UDC 629.7.015.4 BBK 39.52

Zabobin V. V.

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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Stochastic discrete mathematical model of aerometric instrumentation control by data of flight recorders

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UDC 629.7 BBK 39.56

Shomankov D. A.

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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Performance optimization of a pulse-type combustion chamber

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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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Hardware-software simulator for primary radar signals of the control radar

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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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Filtering of optical signals based on multi-layered structures

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UDC 621.372 BBK 39.56

Polyakov D. O.

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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The gyro stabilization of the unmanned aircraft platform for aerial photography and video surveillance

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UDC 531.383 BBK 32.816я431(2Рос)

Popov V. M.

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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