Numerical study of the influence of the atmospheric pressure on the thermal environment in the passenger cabin
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Airplane
Ambient pressure
A theoretical lateral-stability analysis of the XC-120 airplane, equipped with a detachable fuselage, was made to determine the effect on the lateral stability of the high angle of wing incidence for which the airplane was designed. The results of the investigation indicated that the lateral stability of the airplane is satisfactory with or without the detachable fuselage installed (p. 1).
Airplane
Fuselage
Longitudinal static stability
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Despite a low number of airplane accidents in comparison with the overall number of flights in the world, they could not be eliminated. Airplane safety depends on different conditions, which include natural, technical and human factors. Therefore, airplane accidents are connected, mostly, with unforeseen emergencies. Application of transdisciplinary concepts and methods of the transdisciplinary approach to study such accidents made it possible to find out some patterns, connected with individual characteristics of every single plane. These characteristics are determined by year cycles of the natural technical condition change. After special studies its was possible to establish that more than 80 % of airplane accidents and about 100 % of airplane crashes happen in so-called calendar periods of increased sensitivity (PICs). These periods are evenly spread in an individual calendar year of every plane, which begin on the day of its first flight. Specialized computer programs allow to calculate durations of PICs for different planes. Thereby, there is an evidence to introduce transdisciplinary approach to the present airplane safety system. Transdisciplinary improvement of airplane safety can make it possible to eliminate any risks, connected with airplane transportations.
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The important value of expert system applied to airplane system fault diagnosis is discussed generally. The techniques of CBR are used for the design of airplane system diagnosis expert system(MDES).According to the characters of airplane fault diagnosis,the framework of MDES is designed and the relative key techniques are researched.
Airplane
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Computational figures of airplane surface are made to catch an airplane shape in the sence of sight. The airplane surface is described with a large number of quadrangles which are based on section lines of the airplane. In one concrete example, the section lines of an airplane model are measured. This airplane model is composed of a body, a wing, a tail unit and two jet engine nacelles. Several figures of the airplane model in various point of vision are drawn by using the law of perspective. These figures give us clear information of the Shape of the airplane model.
Airplane
Nacelle
Jet engine
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The object of the present report is to discuss the control of airplane from the standpoint of man-machine system dynamics. Parameters affect to the system dynamics and methods to evaluate overall performance are presented.
Airplane
Dynamics
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The calculation of mass distribution characteristics of airplane is an important but complicated and difficult work. A method for calculating mass distribution characteristics of passenger airplane is studied in this paper, it is simple and easy to calculate. Numerical results show that the method provides an effective tool for calculation of passenger airplane design.
Airplane
Mass distribution
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Noise from military airplane operations is a serious problem in affected surroundings of military airports. Usually, military airplane noise emission data are not available in databases of common programs, which causes problems in noise load modeling. In such cases it is necessary to obtain emission data by measurement. Measurement must be performed in modes which are not used in ordinary airplane operation. Based on these measurements, acoustic emission data will be processed in the required form according to a used mathematical model. This paper will include examples of acoustic data acquisition and their utilization in mapping of noise load caused by military airplane operations in the surroundings of military airports. Also, verification of data acquired by prediction and measurement in the airport surrounding ordinary airplane operations will be present.
Airplane
Aircraft noise
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Purpose The purpose of this paper is to present a method for determining the safe flight boundaries of the asymmetrically loaded airplane in the terminal flight phases. The method is applicable to both, the inherent airplane asymmetries and those asymmetries resulting from the airplane use irregularities, asymmetric stores under the wing being one of the examples. The method is aimed to be used in the airplane design and combat airplane service life support.
Airplane
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While airplanes are waiting in the apron, some routines, such as fuel, catering and cargo loading, must be performed before take-off and after landing. During this period images of the airplane in the apron are continuously recorded and evaluated in order to monitor whether these operations are carried out in accordance with the rules without any security problem. Information from different systems and visual evaluations are combined to determine the time, duration and type of operations for each airplane, and then being evaluated for safety and effectiveness of time usage. The aim of this paper is to provide an infrastructure for automatic analysis of aforementioned metric values of an airplane staying in apron. This is done by designing and implementing deep learning instance segmentation algorithm with Mask R-CNN, which is based on detecting the airplane in the video images and by pointing out the components of airplane such as front, back, tail, and gates of the airplane.
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