Landing Gear Mechanical Network Synthesis for Improving Comfort at Landing Considering Aircraft Flexibility

Introduction:Effective synthesis of а mobile communication network includes joint optimisation of two processes: placement of base stations and frequency assignment. In real environments, the well-known cellular concept fails due to some reasons, such as not homogeneous traffic and non-isotropic wave propagation in the service area.Purpose:Looking for the universal method of finding a network structure close to the optimal.Results:The proposed approach is based on the idea of adaptive vector quantization of the network service area. As a result, it is reduced to a 2D discrete map split into zones with approximately equal number of service requests. In each zone, the algorithm finds such coordinates of its base station that provide the shortest average distance to all subscribers. This method takes into account the shortage of the a priory information about the current traffic, ensures maximum coverage of the service area, and what is not less important, significantly simplifies the process of frequency assignment.

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Metrological aspects of pre-flight anti-icing procedures for civil aircraft

The world of measurement ◽

10.35400/1813-8667-2019-3-22-26 ◽

2019 ◽

pp. 22-26

Author(s):

А. Богоявленский ◽

A. Bogoyavlenskiy

Keyword(s):

Negative Impact ◽

Landing Gear ◽

Flight Performance ◽

Spray Nozzle ◽

Subsequent Formation ◽

Inlet Guide Vanes ◽

Civil Aircraft ◽

Engine Compressor ◽

Temperature And Pressure ◽

Instrumental Control

Snow-ice deposits formed on the outer surfaces of aircrafts on the ground during parking can have a negative impact during take-off due to the deterioration of aerodynamic and flight performance, a significant and even critical decrease in lift, increased drag, blocking controls, difficulty or blocking of landing gear retraction, damage to the blades of inlet guide vanes and/or the blades of an engine compressor. To exclude the influence of snow and ice deposits, anti-icing treatment is performed, including their removal and/or protection from subsequent formation. For this purpose, special anti-icing machines (deicers), equipped with such means of instrumental control as counters of anti-icing fluid pumps, measuring scales of anti-icing fluid tanks, thermometers and pressure gauges for temperature and pressure measuring at the outlet of a spray nozzle, are used. The article deals with the metrological aspects of civil aircrafts anti-icing prior to flight.

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Development of the C-17 Nose Landing Gear Container, CNU-691/E

10.21236/ada470353 ◽

2007 ◽

Author(s):

Joel A. Sullivan ◽

Susan J. Evans

Keyword(s):

Landing Gear

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