2018 Aviation Technology, Integration, and Operations Conference最新文献_第8页

A Hybrid Data-Driven Approach to Analyze Aviation Incident Reports 航空事故报告分析的混合数据驱动方法

2018 Aviation Technology, Integration, and Operations Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3982

Xiaoge Zhang, S. Mahadevan

引用次数: 5

Initial approach to collect small Unmanned Aircraft System off-nominal operational situations data 初始进近收集小型无人机系统非标称操作情况数据

2018 Aviation Technology, Integration, and Operations Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3030

Jaewoo Jung, Charles Drew, S. Nag, Edgar Torres, A. Ishihara, Hemil C. Modi, M. Do

引用次数: 2

Measuring the Benefits of NextGen Metroplex in Convective Weather: Case Study of North Texas Metroplex 测量下一代大都市在对流天气下的效益:北德克萨斯州大都市的案例研究

2018 Aviation Technology, Integration, and Operations Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-4235

Yu Zhang, Hualong Tang, D. Knorr, Almira Ramadani

{"title":"Measuring the Benefits of NextGen Metroplex in Convective Weather: Case Study of North Texas Metroplex","authors":"Yu Zhang, Hualong Tang, D. Knorr, Almira Ramadani","doi":"10.2514/6.2018-4235","DOIUrl":"https://doi.org/10.2514/6.2018-4235","url":null,"abstract":"A key component of the goals of the Next Generation Air Transportation System (NextGen) is to safely improve the efficiency of the National Airspace System (NAS) by enhancing efficiency in metroplexes. Based on the use of precise satellite-based navigation, Time Based Flow Management (TBFM), and other advanced techniques and tools, the benefits of a metroplex have been identified through research, indicating that it is capable of making airspace more efficient with less queueing delay and more throughput. However, those studies focused only on operations in normal weather conditions; special weather conditions such as convection were not considered. This study investigated the quantitative impacts of a metroplex under representative operation conditions in convection. Investigations included identification of representative convective weather conditions, analysis of historical radar tracking data in a post-metroplex period, development of queuing system-based models of Terminal Radar Approach Control (TRACON) facility arrival operations with and without metroplex for the North Texas Metroplex, and simulations to evaluate airspace performance in terms of TRACON throughput and arriving delays. Simulation analyses showed an average 27% increase in TRACON throughput with peak demand of 15 minutes, with 2.39 minutes saved per arrival flight at Dallas/Fort Worth International (DFW) and 1.65 minutes saved per arrival flight at Dallas Love Field (DAL) when a metroplex is implemented. The increase in TRACON throughput and arrival time saved by a metroplex climbs as traffic grows; however, the efficiency gains reach a limit when traffic grows 40%.","PeriodicalId":229151,"journal":{"name":"2018 Aviation Technology, Integration, and Operations Conference","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116309111","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

Sensitivity Analysis of Detect and Avoid Well Clear Parameter Variations on UAS DAA Sensor Requirements 检测和避免清晰参数变化对UAS DAA传感器要求的灵敏度分析

2018 Aviation Technology, Integration, and Operations Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3505

Jeremy Hardy, D. Jack, K. Hoffler

引用次数: 3

Quantifying Uncertainties during the Early Design Stage of a Gas Turbine Disc by Utilizing a Bayesian Framework 利用贝叶斯框架量化燃气轮机圆盘设计早期阶段的不确定性

2018 Aviation Technology, Integration, and Operations Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3202

Bogdan Profir, M. H. Eres, J. Scanlan, Ron Bates, C. Argyrakis

引用次数: 1

An Assessment of the Terminal Airspace Performance Indicator 终端空域性能指标的评估

2018 Aviation Technology, Integration, and Operations Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-4142

Osama Alsalous, R. Galaviz-Schomisch

引用次数: 1

Design and Performance of a Hybrid-Electric Fuel Cell Flight Demonstration Concept 混合动力燃料电池飞行演示概念的设计与性能

2018 Aviation Technology, Integration, and Operations Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3357

N. Borer, Steven C. Geuther, Brandon L. Litherland, L. Kohlman

{"title":"Design and Performance of a Hybrid-Electric Fuel Cell Flight Demonstration Concept","authors":"N. Borer, Steven C. Geuther, Brandon L. Litherland, L. Kohlman","doi":"10.2514/6.2018-3357","DOIUrl":"https://doi.org/10.2514/6.2018-3357","url":null,"abstract":"As electric powertrain and propulsion-airframe integration technologies advance, airborne electric propulsion concepts appear to be on the cusp of disrupting or transforming aviation markets. One of the many challenges to this transformation lies within the onboard energy storage and generation technologies. State-of-the-art battery technology is heavy and lacks support infrastructure; purely combustion-based solutions to electrical power generation suffer from increased inefficiency as compared to a traditional combustion powertrain. This paper explores another alternative: a hybrid-electric, solid oxide fuel cell power system. This power system reforms traditional fuels to feed fuel cells that generate electrical power for the aircraft electric powertrain. A representative power system is designed based on the requirements for NASA’s X-57 Mod II electric flight demonstrator platform, and is shown to exceed system feasibility goals of 300 W/kg and 60% efficiency in at least one configuration. The hybrid-electric fuel cell power system is shown to be competitive with the range performance of a combustion-based power architecture and comparable in mission energy cost to a battery-electric power system.","PeriodicalId":229151,"journal":{"name":"2018 Aviation Technology, Integration, and Operations Conference","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133562153","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: 19

Benefit Analysis and System Design Considerations for Drag Reduction of Inactive Hover Rotors on Electric Fixed-Wing VTOL Vehicles 电动固定翼垂直起降飞行器非活动悬停旋翼减阻效益分析及系统设计考虑

2018 Aviation Technology, Integration, and Operations Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-4150

P. Stahl, C. Rössler, M. Hornung

{"title":"Benefit Analysis and System Design Considerations for Drag Reduction of Inactive Hover Rotors on Electric Fixed-Wing VTOL Vehicles","authors":"P. Stahl, C. Rössler, M. Hornung","doi":"10.2514/6.2018-4150","DOIUrl":"https://doi.org/10.2514/6.2018-4150","url":null,"abstract":"Fixed-wing VTOL aircraft are aerial vehicles capable of both hover and fast forward flight. Lift during take-off and landing is generated by rotors. After takeoff, they transition into forward flight mode in which a wing produces the lift. For the widespread fixed-wing VTOL configurations that use separate powertrains to produce vertical hover thrust and horizontal cruise thrust, the inactive hover rotor adds aerodynamic drag in cruise flight. This paper presents the systematic development, functional testing, drag reduction measurement and aircraft-level performance impact analysis of a drag reduction system for inactive hover rotors. With the key requirements identified, subfunction solutions were derived and combined to a consistent drag reduction system concept employing a morphological box approach. The main principle of the concept is the retraction of the two blade rotor into a recess in the fuselage using the bidirectional rotation of a threaded rotor shaft. The implementation of this concept proved robust operation in a wind tunnel. A significant drag reduction due to the retracted rotor compared to fixed, fuselage-aligned rotor could be assessed. With the gained data, a validation and modification of the inactive rotor drag modelling was possible. Furthermore, an extrapolation of the rotor storage mechanism’s benefit on a typical fixed-wing VTOL aircraft’s mission performance was conducted. An increase in cruise endurance between 1 and 6% over fuselage-aligned rotors is estimated for small unmanned aircraft, while manned urban air transport aircraft can realize improvements in the order of 10%.","PeriodicalId":229151,"journal":{"name":"2018 Aviation Technology, Integration, and Operations Conference","volume":"88 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130756860","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: 9

Measuring Fuel and Travel Time Benefits for the Caribbean Oceanic Flights Through Computer Simulations 通过计算机模拟测量加勒比海航班的燃油和旅行时间效益

2018 Aviation Technology, Integration, and Operations Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-4236

A. Izadi, N. Hinze, A. Trani, Aswin K. Gunnam

引用次数: 8

Range Equation For a Series Hybrid Electric Aircraft 串联混合动力飞机的航程方程

2018 Aviation Technology, Integration, and Operations Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3208

R. Ravishankar, S. Chakravarthy

引用次数: 7