Aviation最新文献_第8页

DETERMINATION OF THE FACTORS AFFECTING AIRFREIGHT AND MAPPING SIMILAR COUNTRIES VIA MULTIDIMENSIONAL SCALING 确定影响航空货运的因素，并通过多维尺度绘制相似国家的地图

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Aviation Pub Date : 2021-08-19 DOI: 10.3846/aviation.2021.14997

Tuzun Tolga Inan, Neslihan Gökmen

{"title":"DETERMINATION OF THE FACTORS AFFECTING AIRFREIGHT AND MAPPING SIMILAR COUNTRIES VIA MULTIDIMENSIONAL SCALING","authors":"Tuzun Tolga Inan, Neslihan Gökmen","doi":"10.3846/aviation.2021.14997","DOIUrl":"https://doi.org/10.3846/aviation.2021.14997","url":null,"abstract":"As long as people and freights need to move from one place to another, the civil aviation industry will always exist. In this study, a country-based examination has been made on total airfreight transport. Also, gross domestic product (GDP) and total population data were included in this study. 50 countries were selected according to the most recent value that included the years 2018 or 2019 and 26 of these were included in the analysis which was covered in all three rankings. The purpose of the study is to find the similarities between countries based on the total airfreight transportation, total GDP, and total population. The relationship between the three parameters was examined with the correlation analysis. Afterward, the associated parameters were taken as independent variables and the total airfreight transportation variable was modeled by multiple linear regression analysis. In light of these analyses, GDP and total population have a significant impact on total airfreight transportation. To check the assumptions related to outliers, residuals are determined. To show the outliers and the similarities of the countries clearly, the multidimensional scaling method is used. Multidimensional scaling configuration shows that Turkey and the United Kingdom have similarities in terms of total airfreight numbers.","PeriodicalId":51910,"journal":{"name":"Aviation","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42755684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A NEW CLOSED FORM SOLUTION FOR DYNAMIC STABILITY ANALYSIS OF ROLLING AIRFRAMES HAVING ONE PAIR ON-OFF ACTUATOR 一种新的具有一对开关作动器的滚动机身动态稳定性分析的封闭形式解

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Aviation Pub Date : 2021-08-19 DOI: 10.3846/aviation.2021.13832

J. Karimi

引用次数: 0

METHODICAL ASPECTS OF THE LTO CYCLE USE FOR ENVIRONMENTAL IMPACT ASSESSMENT OF AIR OPERATIONS BASED ON THE WARSAW CHOPIN AIRPORT 基于华沙肖邦机场的航空业务环境影响评估的lto循环使用的系统方面

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Aviation Pub Date : 2021-08-18 DOI: 10.3846/aviation.2021.14972

Galant-Gołębiewska Galant-Gołębiewska, R. Jasiński, Monika Ginter, Marta Maciejewska, M. Nowak, Paula Kurzawska

{"title":"METHODICAL ASPECTS OF THE LTO CYCLE USE FOR ENVIRONMENTAL IMPACT ASSESSMENT OF AIR OPERATIONS BASED ON THE WARSAW CHOPIN AIRPORT","authors":"Galant-Gołębiewska Galant-Gołębiewska, R. Jasiński, Monika Ginter, Marta Maciejewska, M. Nowak, Paula Kurzawska","doi":"10.3846/aviation.2021.14972","DOIUrl":"https://doi.org/10.3846/aviation.2021.14972","url":null,"abstract":"The aviation engines homologation process takes place in LTO (Landing and Take-Off) test cycle. Mentioned procedure is good for the approval applications because the test conditions are repeatable and obtained results could be compared between different engines. The authors compared in this article the exhaust emission results obtained in LTO test cycle during selected engine homologation with values obtained in estimations. Two Allied Signal TFE731-2-2B engines with a thrust of 15.6 kN were taken into considerations. The engines are used to propel the popular VLJ (Very Light Jet) aircraft: Dassault Falcon 100. Adopted methodology of emission estimation is very similar to the LTO, because the authors use the emission factors obtained in LTO cycle, specified for selected engines. Also, the duration of take-off, climb-out and approach LTO phases were adopted to the estimations. In the analyzed case, 16 scenarios of taxi phase were selected on the basis of the Warsaw Chopin Airport available runways. Duration of taxi phase in these cases vary between 3.1 to 11.0 minutes which is at least 58% less than in LTO test. Assuming the real taxi times change the exhaust emission results comparing to normal LTO cycle up to about 64%. The proposed methodology could be used for assessing environmental impact of air operations, which can be used to create the reports with more accurate data than with typical LTO times.","PeriodicalId":51910,"journal":{"name":"Aviation","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47625255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

MODELLING OF THE UNMANNED AERIAL VEHICLES FLIGHT CONTROL SYSTEM 无人机飞行控制系统建模

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Aviation Pub Date : 2021-08-17 DOI: 10.3846/aviation.2021.13391

M. Adamski

{"title":"MODELLING OF THE UNMANNED AERIAL VEHICLES FLIGHT CONTROL SYSTEM","authors":"M. Adamski","doi":"10.3846/aviation.2021.13391","DOIUrl":"https://doi.org/10.3846/aviation.2021.13391","url":null,"abstract":"The article is an independent work containing the author’s ingenious research methodology and the model of the control system of Unmanned Aerial Vehicles. Furthermore a unique and world first mathematical model of an Unmanned Aerial Vehicle was developed, as well as a simulation program which enabled to investigate the control system of any Unmanned Aerial Vehicles in the tilt duct pitch (altitude), bank (direction), deviation and velocity, depending upon the variable values of the steering coefficient, reinforcement coefficient and the derivative constant. The research program was written in the language of the C++ as the MFC class, on the MS Visual Studio 2010 platform. The main issue resolved in the article is the pioneering research of the process of control during manual and semi-automatic guidance of the Unmanned Aerial Vehicle, with a jet propulsion system to the coordinates of preset points of the flight route. Modelling of the flight control system takes into account: the logical network of operations of the simulation program, the pilot-operator model, the set motion and control deviations as well as the flight control laws. In addition, modeling of the control system takes into account the drive model, engine dynamics, engine thrust, the model of steering actuators and the model of external loads. In contrast, the external load model takes into account the external forces acting on the unmanned aircraft, including gravitational forces and moments, aerodynamic forces and moments, aerodynamic drag, aerodynamic lateral forces, aerodynamic lift forces, aerodynamic heeling moment, mechanism of local angle of attack from damping torque and forces and moments from the engine.","PeriodicalId":51910,"journal":{"name":"Aviation","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2021-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48079292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

LATLAUNCH AIR-LAUNCH SYSTEM FOR LOW-COST LAUNCHING OF SMALL SATELLITES INTO LOW EARTH ORBIT 用于低成本向近地轨道发射小卫星的后发射空发射系统

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Aviation Pub Date : 2021-06-23 DOI: 10.3846/aviation.2021.12382

A. Urbahs, S. Kravchenko, M. Urbaha, K. Carjova, Natalja Panova, R. Chatys

引用次数: 1

RESEARCH ON CHARACTERISTICS OF TURBO JET ENGINE COMBUSTION CHAMBER 涡轮喷气发动机燃烧室特性研究

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Aviation Pub Date : 2021-04-16 DOI: 10.3846/AVIATION.2021.14398

Andrius Dubovas, D. Bručas

引用次数: 0

AIRLINE PILOT SITUATION AWARENESS: PRESENTING A CONCEPTUAL MODEL FOR META-COGNITION, REFLECTION AND EDUCATION 飞行员态势感知：为元认知、反思和教育提供一个概念模型

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Aviation Pub Date : 2021-04-16 DOI: 10.3846/AVIATION.2021.14209

W. J. Irwin, T. Kelly

{"title":"AIRLINE PILOT SITUATION AWARENESS: PRESENTING A CONCEPTUAL MODEL FOR META-COGNITION, REFLECTION AND EDUCATION","authors":"W. J. Irwin, T. Kelly","doi":"10.3846/AVIATION.2021.14209","DOIUrl":"https://doi.org/10.3846/AVIATION.2021.14209","url":null,"abstract":"The dissertation research summarized here, utilized the Grounded Theory Method to develop a conceptual model of pilot situation awareness from 223 Aviation Safety Reporting System (ASRS) narratives. The application of Latent Semantic Analysis aided the theoretical sampling of ASRS reports. A multistage model was developed involving attention, perception, interpretation, decision making, and action in support of goal-driven behavior. Narrative report coding identified several categories of situation awareness elements that pilots direct their attention to in building and maintaining situation awareness. Internal to the aircraft, flight crews directed their attention to the aircraft’s flight state and automation state. They also directed their attention to the condition of the aircraft, the functioning of the crew, and the status of the cabin. External to the aircraft, flight crews directed their attention to airport conditions, air traffic control, terrain, traffic, and weather. Pilots were also aware of the passage of time. Twelve characteristics of situation awareness were identified from narrative report coding which were subsequently compared with existing theoretical perspectives of situation awareness.","PeriodicalId":51910,"journal":{"name":"Aviation","volume":"25 1","pages":"50-64"},"PeriodicalIF":1.0,"publicationDate":"2021-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41338101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

APPLICATION OF AN OPTIMAL CONTROL ALGORITHM FOR A GYROSCOPE SYSTEM OF A HOMING AIR-TO-AIR MISSILE 制导空空导弹陀螺仪系统最优控制算法的应用

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Aviation Pub Date : 2021-04-13 DOI: 10.3846/AVIATION.2021.13899

I. Krzysztofik, Z. Koruba

{"title":"APPLICATION OF AN OPTIMAL CONTROL ALGORITHM FOR A GYROSCOPE SYSTEM OF A HOMING AIR-TO-AIR MISSILE","authors":"I. Krzysztofik, Z. Koruba","doi":"10.3846/AVIATION.2021.13899","DOIUrl":"https://doi.org/10.3846/AVIATION.2021.13899","url":null,"abstract":"Missile homing precision depends mainly on the correct determination of the current angle between the Gyroscope System Axis (GSA) and the target line-of-sight (LOS). A gyroscope automatic control system shall ensure spontaneous levelling of this angle, hence, constant homing of the gyroscope system axis in on the LOS, i.e. tracking the target by the head. The available literature on the subject lacks a description of how to use the controlled gyro system in the process of guiding the missile onto the target. In this paper, the authors present the original development of an optimal control algorithm for a gyro system with a square quality indicator in conditions of interference and kinematic influence of the missile deck. A comparative analysis of the LQR with the PD regulator was made. PD regulator parameters are also selected optimally, using the Golubencev method, so that the transition process of the homing system fades over a minimal time, while simultaneously ensuring the overlapping of the gyroscope axis with the target line-of-sight. The computer simulation results have been obtained in a Matlab-Simulink environment and are presented in a graphic form.","PeriodicalId":51910,"journal":{"name":"Aviation","volume":"25 1","pages":"41-49"},"PeriodicalIF":1.0,"publicationDate":"2021-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46072983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

WIRELESS-BASED TECHNOLOGY FOR OPTIMIZING OF OPERATION OF THE AVIATION ENGINE CONTROL SYSTEM 基于无线技术的航空发动机控制系统运行优化

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Aviation Pub Date : 2021-04-07 DOI: 10.3846/AVIATION.2021.13828

S. Tovkach

引用次数: 3

GROUND BASED VARIABLE STABILITY FLIGHT SIMULATOR 地面变稳定飞行模拟器

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Aviation Pub Date : 2021-04-07 DOI: 10.3846/AVIATION.2021.13564

K. Chandrasekaran, Vijeesh Theningaledathil, Archana Hebbar

引用次数: 3