Modelling Flexible Thrust Performance For Trajectory Prediction Applications In Air Traffic Management
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Modelling Flexible Thrust Performance For Trajectory Prediction Applications In Air Traffic Management
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Author : Ismael Matamoros Cid
language : en
Publisher:
Release Date : 2015
Modelling Flexible Thrust Performance For Trajectory Prediction Applications In Air Traffic Management written by Ismael Matamoros Cid and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The Air Traffic Management (ATM) paradigm is shifting towards a scenario where Trajectory Predictors (TP) play a key role. They rely on Aircraft Performance Models (APM), mathematical models of the performance related characteristics of aircraft. The widespread use of non-coventional take-off procedures, such as the flexible thrust method, has arose the necessity of modelling them to keep fidelity in take-off trajectory predictions. This project, carried out with Boeing Research & Technology Europe (BR&TE) and upon request of EUROCONROL, arises in response to the current lack in the APM market of a validated methodology to model reduced thrust operations. Its goal is to propose a complete and validated model to compute reduced thrust using Assumed Temperature (AT). The proposed methodology is composed by a model of AT and a thrust model properly validated for flexible thrust computations. To accomplish this goal, a new specification of the AT model that is being developed by BR&TE has been implemented, based upon a set of improvements suggested by EUROCONTROL. In order to determine a valid thrust model for flexible thrust computations, EUROCONTROL'S Base of Aricraft Data (BADA) and Aircraft Noise Performance (ANP) APMs have been validated. These validations have been carried out with different official Boeing's performance software: the Standard Take-off Analysis Software (STAS) and the Boeing Climbout Program (BCOP). As a result of the study different order polynomials that model the AT as a function of the take-off conditions have been produced. In addition, it has been concluded that ANP contains a valid thrust model for flexible thrust calculations, whereas the current version of BADA is not valid to compute thrust during the take-off phase. A first application of this method has been put into effect by developing a prototype of a Take-off Trajectory Predictor (TTP) that implements the flexible thrust model. This prototype is intended to be integrated in Boeing's trajectory computation infrastructure in the future as a take-off and landing module and needs to be improved, validated with Boeing's performance software and integrated as future work.
Trajectory Prediction Uncertainty Modelling For Air Traffic Management
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Author : Enrique Juan Casado Magaña
language : en
Publisher:
Release Date : 2016
Trajectory Prediction Uncertainty Modelling For Air Traffic Management written by Enrique Juan Casado Magaña and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
An Integrated Framework For Trajectory Optimisation Prediction And Parameter Estimation For Advanced Aircraft Separation Concepts
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Author : Santi Vilardaga García-Cascón
language : en
Publisher:
Release Date : 2019
An Integrated Framework For Trajectory Optimisation Prediction And Parameter Estimation For Advanced Aircraft Separation Concepts written by Santi Vilardaga García-Cascón and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Since the birth of commercial aviation, the applications and benefits of aircraft have grown immensely. This, in perfect synchrony with the average increase of purchasing power of the society, has rocketed the number of aircraft flying the skies. This increase comes at a cost, both in environmental and airspace capacity aspects. This thesis works towards the alleviation of the issues caused by the high number of flights, proposing concepts and mechanisms to safely increase the airspace capacity whilst minimising the environmental impact of aviation. This incredibly complex and neverending pursuit is omnipresent in the literature. One promising topic is the four dimensional (4D) trajectory optimisation with higher levels of automation.The research in this PhD thesis proposes an integrated framework for trajectory optimisation, trajectory prediction and parameter estimation, with which new air traffic management concepts can be assessed. This framework has the flexibility to optimise trajectories ranging from a free-flight to a very strict route structure, from a complete freedom at the vertical profile to a specific adherence to flight levels, etc. The 4D optimisation strategy results in a trajectory that complies with the scenario characteristics, which minimises a given functional objective such as the operational cost, time, fuel, etc. Furthermore, the same framework is used in a novel strategy to perform adaptive trajectory prediction (with conformance monitoring), and to estimate unknown parameters of an aircraft.To resolve this problem, an optimal control problem is formulated and converted into a non-linear programming (NLP) problem with direct collocation methods, and numerically resolved by an NLP solver. A comprehensive software architecture is presented, taking benefit from the best of two worlds to enable the flexibility and genericity of the developed optimisation framework: an object-oriented software coding language (C++) and a very powerful algebraic modelling language (GAMS).Based on this optimisation framework, the thesis produces operationally relevant results, demonstrating that the framework can cope with a variety of problems, and contributing to the ultimate goal of safely increasing airspace capacity and air traffic efficiency. Illustrative examples are presented focussed on the departure phase within a terminal manoeuvring area. First, an assessment of the efficiency of required times of arrival as a ways to increase air traffic capacity is presented, providing results on the cost in terms of fuel and time of imposing these time requirements within a TMA (which can get to surprisingly low figures), and its effectiveness for traffic separation. Second, the implementation of an aircraft separation methodology is presented, where an intruder trajectory is predicted and the ownship calculates its own optimal trajectory that deviates from it. A conformance monitoring strategy is implemented to ensure that the separation is maintained throughout the flight, acknowledging deviations, and reacting accordingly. Third, the prediction of the intruder trajectory is enhanced by the estimation of an equivalent mass using known past states. An impressive accuracy is achieved early after the beginning of the flight. Finally, the implementation of a multi-aircraft separation strategy is presented, where multiple aircraft are simultaneously optimised in the same optimisation problem, all whilst maintaining separation between them. The complexity of the alignment of aircraft coordinates for a fair comparison is tackled from a novel perspective.Conclusively, the different strategies for aircraft separation are compared, and quite surprisingly the best results for each strategy are quite similar. Indeed, the increase in operational cost that the different strategies present (when compared to the individual optimal trajectory) is negligible and alledgedly better than the current air traffic control separation paradigm.
Sensitivity Of Trajectory Prediction In Air Traffic Management And Flight Management Systems
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Author : Michael Rollin Charles Jackson
language : en
Publisher:
Release Date : 1997
Sensitivity Of Trajectory Prediction In Air Traffic Management And Flight Management Systems written by Michael Rollin Charles Jackson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1995
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.
Performance Of The Jet Transport Airplane
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Author : Trevor M. Young
language : en
Publisher: John Wiley & Sons
Release Date : 2017-10-30
Performance Of The Jet Transport Airplane written by Trevor M. Young and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-30 with Technology & Engineering categories.
Performance of the Jet Transport Airplane: Analysis Methods, Flight Operations, and Regulations presents a detailed and comprehensive treatment of performance analysis techniques for jet transport airplanes. Uniquely, the book describes key operational and regulatory procedures and constraints that directly impact the performance of commercial airliners. Topics include: rigid body dynamics; aerodynamic fundamentals; atmospheric models (including standard and non-standard atmospheres); height scales and altimetry; distance and speed measurement; lift and drag and associated mathematical models; jet engine performance (including thrust and specific fuel consumption models); takeoff and landing performance (with airfield and operational constraints); takeoff climb and obstacle clearance; level, climbing and descending flight (including accelerated climb/descent); cruise and range (including solutions by numerical integration); payload–range; endurance and holding; maneuvering flight (including turning and pitching maneuvers); total energy concepts; trip fuel planning and estimation (including regulatory fuel reserves); en route operations and limitations (e.g. climb-speed schedules, cruise ceiling, ETOPS); cost considerations (e.g. cost index, energy cost, fuel tankering); weight, balance and trim; flight envelopes and limitations (including stall and buffet onset speeds, V–n diagrams); environmental considerations (viz. noise and emissions); aircraft systems and airplane performance (e.g. cabin pressurization, de-/anti icing, and fuel); and performance-related regulatory requirements of the FAA (Federal Aviation Administration) and EASA (European Aviation Safety Agency). Key features: Describes methods for the analysis of the performance of jet transport airplanes during all phases of flight Presents both analytical (closed form) methods and numerical approaches Describes key FAA and EASA regulations that impact airplane performance Presents equations and examples in both SI (Système International) and USC (United States Customary) units Considers the influence of operational procedures and their impact on airplane performance Performance of the Jet Transport Airplane: Analysis Methods, Flight Operations, and Regulations provides a comprehensive treatment of the performance of modern jet transport airplanes in an operational context. It is a must-have reference for aerospace engineering students, applied researchers conducting performance-related studies, and flight operations engineers.
The Impact Of Trajectory Prediction Uncertainty On Reliance Strategy And Trust Attitude In An Automated Air Traffic Management Environment
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Author : Sarah M. Hunt
language : en
Publisher:
Release Date : 2013
The Impact Of Trajectory Prediction Uncertainty On Reliance Strategy And Trust Attitude In An Automated Air Traffic Management Environment written by Sarah M. Hunt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Air traffic control categories.
Future air traffic environments have the potential to exceed human operator capabilities. In response, air traffic control systems are being modernized to provide automated tools to overcome current-day workload limits. Highly accurate aircraft trajectory predictions are a critical element of the automated tools envisioned as part of the evolution of today's air traffic management system in the United States, known as NextGen. However, automation accuracy is limited due to the effects of external variables: "errors" such as wind forecast uncertainties. The focus of the Trajectory Prediction Uncertainty simulation at NASA Ames Research center were the effects of varied levels of accuracy on operator's tool use during a time based metering task. The simulation's environment also provided a means to examine the relationship between an operator's reliance strategy and underlying trust attitude. Operators were found to exhibit an underlying trust attitude distinct from their reliance strategies, supporting the strategic use of the Human-Automation trust scale in an air traffic control environment.
Medium Term Trajectory Prediction Data Management For Air Traffic Control
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Author : Andreas Schlegel
language : en
Publisher:
Release Date : 2011
Medium Term Trajectory Prediction Data Management For Air Traffic Control written by Andreas Schlegel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Real Time Trajectory Optimization And Air Traffic Control Simulation For Noise Abatement Approach Procedures
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Author : Feng Zou
language : en
Publisher:
Release Date : 2004
Real Time Trajectory Optimization And Air Traffic Control Simulation For Noise Abatement Approach Procedures written by Feng Zou and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Aircraft noise is a major obstacle to the growth of aviation. This thesis presents an adaptive onboard real-time optimization algorithm and an Air Traffic Control simulation model that can minimize the aircraft approach noise and meet air traffic control targets and restrictions. The adaptive real-time optimization algorithm uses dynamic programming, nonlinear optimization, and receding horizon control to generate approach procedures. The resulting noise abatement trajectories compensate for environmental uncertainties, provide more flexibility to air traffic controllers and pilots, and improve airport efficiency while lowering community noise. The Air Traffic Control simulation model simulates a fleet approach with noise abatement approaches. Three different status displays are tested and compared in the simulation, and the optimal displays for controller are explored in the thesis.
Prediction Of Aircraft Trajectories For Air Traffic Control Using Machine Learning Approaches
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Author : Marko Hrastovec
language : en
Publisher:
Release Date : 2018
Prediction Of Aircraft Trajectories For Air Traffic Control Using Machine Learning Approaches written by Marko Hrastovec and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.