A Systematic Design Method of Civil Aircraft Flight Crew Alerting System

Author(s):  
Li Qian ◽  
Hongtao Liu ◽  
Lingchen Zhou
2021 ◽  
Vol 11 (7) ◽  
pp. 3165
Author(s):  
Zhigang Wang ◽  
Yu Yang

A seamless and smooth morphing leading edge has remarkable potential for noise abatement and drag reduction of civil aircraft. Variable-stiffness compliant skin based on tailored composite laminate is a concept with great potential for morphing leading edge, but the currently proposed methods have difficulty in taking the manufacturing constraints or layup sequence into account during the optimization process. This paper proposes an innovative two-step design method for a variable-stiffness compliant skin of a morphing leading edge, which includes layup optimization and layup adjustment. The combination of these two steps can not only improve the deformation accuracy of the final profile of the compliant skin but also easily and effectively determine the layup sequence of the composite layup. With the design framework, an optimization model is created for a variable-stiffness compliant skin, and an adjustment method for its layups is presented. Finally, the deformed profiles between the directly optimized layups and the adjusted ones are compared to verify its morphing ability and accuracy. The final results demonstrate that the obtained deforming ability and accuracy are suitable for a large-scale aircraft wing.


2021 ◽  
Vol 2136 (1) ◽  
pp. 012016
Author(s):  
Jingtao Wu ◽  
Pei Wang ◽  
Jin Cai ◽  
Ying Liu

Abstract In the process of civil aircraft airworthiness, analyzing power quality is the key to verify whether the power supply system meets the requirements of the clause. This paper makes deep research on the domestic and foreign power supply quality standard files and detailed introduces the characteristics of the power supply quality standard files. Then, comparative and analysis give suggestions which tally with power supply quality test requirements. Finally, define the special power supply quality test method for the practical engineering specifically, and power supply quality test characteristic in civil aircraft flight test, to provide guidance help for the future civil aircraft models.


Author(s):  
Natalya S. Ulanova

The last decade of the 20th century saw another boom in the supply of Soviet-made civil aircraft to the countries of Africa. Hundreds of highly qualified aviation specialists from all post-Soviet states were involved in its operation and maintenance. Market relations, new for many of them, the aggressive way of doing business on the part of entrepreneurs, as well as the complicated military and political situation in some regions, have led to the formation of a certain type of business and personal relationships. Lessons learned over the thirty years of work in special economic and socio-cultural conditions are still actual. Nevertheless, this aspect of Russia-Africa relations remains one of the least studied. Analysis of the narratives of the eyewitnesses - pilots, flight engineers, translators - is still the only way to know more about some hallmarks of the African aviation market, which still has a significant shadow segment. For this study the narratives of a Russian flight engineer who has worked as a flight crew member in various African countries for more than ten years were collected. The recollections presented relate to the first organized trip to South Africa and Mozambique in 1992, and to the later period of private contract work in Angola and Rwanda, and are interesting because they trace the formation of psychological and ethnocultural aspects of business and personal contacts with the employers, local residents and co-workers.


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