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This paper presents an automatic airspace sectorization method for air traffic management in presence of many climbing trajectories. For this purpose, we have modified the formulation, and solved it using Non-dominated Sorting Genetic Algorithm II (NSGA-II) and Voronoi diagrams. The air traffic controller's monitoring workload is formulated with the use of modified dynamic density, which is a more...
Sri Lanka is located in an ideal position in the world map to harness more solar power compared to the countries situated away from the equator. Yet, Sri Lanka has been unable to gain the maximum advantage out of it due to the lower usage of solar harnessing systems partially due to the higher pay back periods of imported solar panels. The main purpose of this study is to optimize the electrical power...
The growth of the nascent UAS industry will be affected by the airspace coordination rules between drones because these rules can impact business profitability. Few analyses have been reported to support design of commercial UAS operations in low-altitude commercial urban airspace. Analysis of minimum horizontal separation is critical for designing safe and efficient UAS delivery systems. In this...
The main goal in Continuous Descent Arrival (CDA) operations is the management of flight trajectories in order to optimize the operating capability of the aircraft in Terminal Manoeuvring Area (TMA), reducing fuel burn and emissions during the descent/approach phase. At the same time the maximization of airspace efficiency/capacity needs to be addressed considering local airspace requirements and...
Autonomous guided airdrop systems based on ram-air parafoils have been addressed to obtain the precision and accuracy of airdropped payload delivery, which has been studied as a two-body system, with flexible structure and 9 degrees of freedom (DOF). The gliding path of parafoil-payload system is directly affected by airdropping zone terrain model, which can be simplified and employed to generate...
This paper considers trajectory tracking of a stratospheric autonomous airship. A new control scheme was proposed based on the computed torque method, a fuzzy approximation system and a compensating controller. Firstly, a dynamic model for the airship was established and the issue of trajectory control was defined. Secondly, a fuzzy adaptive trajectory control system was designed using the computational...
Aiming at the problem of trajectory prediction in air traffic control automation system, a new method of trajectory prediction based on aircraft motion model and grey theory is proposed. This method combines the aircraft motion model and the prediction method of grey theory, which realizes the real-time online trajectory prediction and improves the prediction accuracy. This prediction method has strong...
With the rapid development of Chinese air transportation industry, air traffic becomes increasingly congested thus further worsen the delay problem. As an appealing countermeasure, the Network-wide Flight Trajectories Planning (NFTP) could provide a pre-tactical solution which reduces airspace congestion and flight delay by optimizing the 4D trajectories of all flights in the entire airspace. Notwithstanding,...
This paper describes a set of flight simulation experiments carried out with the DLR's Generic Cockpit Simulator (GECO). A new concept named time and energy managed operations (TEMO), which aims to enable advanced four dimensional (4D) continuous descent operations (CDO), was evaluated after three full days of experiments with qualified pilots. The experiment focused to investigate the possibility...
Trajectory predictors are core components of many air traffic applications. This includes cockpit, dispatch, flight planning, strategic fleet planning, air traffic control, traffic flow management, and aviation research applications. In all these different approaches, aircraft performance models are often required such as, for instance, drag polar aerodynamic data and maximum thrust propulsion data...
The modernization of the European air transportation system will increase the need for data communication. This creates the need for large-scale simulations to ascertain that new aeronautical communication systems fulfil the requirements of future air traffic management communication. This paper presents a framework for such simulations based on service-oriented software architecture. The Framework...
Managing trajectory separation of unmanned aircraft is critical to ensuring accessibility, efficiency, and safety in low altitude airspace. The concept of a geo-fence has emerged as a way to manage trajectory separation. A geo-fence consists of distance buffers that enclose individual trajectories to identify a ‘keep-in’ region and/or enclose areas that identify ‘keep-out’ regions. The ‘keep-in’ geo-fence...
Air traffic in the North Atlantic oceanic airspace (NAT) experiences very strong winds caused by jet streams. Flying wind-optimal trajectories increases individual flight efficiency, which is advantageous when operating in the NAT. However, as the NAT is highly congested during peak hours, a large number of potential conflicts between flights are detected for the sets of wind-optimal trajectories...
In this article, we test a horizontal detect and avoid algorithm for UASs flying in Terminal Control Areas. We have used recorded commercial traffic trajectories and randomly built thousands of conflict scenarios with UASs to check the ability of such an algorithm to ensure the separation with commercial aviation. We consider two different types of UASs, flying at 80kn or 160kn, with six different...
A Human-In-The-Loop simulation was conducted in January of 2013 in the Airspace Operations Laboratory at NASA's Ames Research Center. The simulation airspace included two en route sectors feeding the northwest corner of Atlanta's Terminal Radar Approach Control. The focus of this paper is on how uncertainties in the study's trajectory predictions impacted the controllers' ability to perform their...
This paper presents a Research and Development (R&D) effort to design and develop a flight simulation system with Adaptive Surveillance Broadcast (ADS-B), and Traffic Collision Avoidance System (TCAS), for integration of Unmanned Aerial Systems (UAS) into National Airspace System (NAS). The paper will delineate the design and development of the Next Generation Applied Research (NEAR) Lab's FMS...
This paper presents a new data-driven air traffic modelling and analysis technique that can support operational risk analysis for unmanned aircraft integration. The proposed technique exploits advances in computer vision to autonomously extract and analyse the spatial distribution of arbitrary traffic densities, which can provide the foundation for quantitative and tailored risk assessments. The framework...
This paper presents Multi Objective Trajectory Optimization (MOTO) algorithms that were developed for integration in state-of-the-art Air Traffic Management (ATM) and Air Traffic Flow Management (ATFM) systems. The MOTO algorithms are conceived for the automation-assisted replanning of 4-Dimensional Trajectories (4DT) when unforeseen perturbations arise at strategic and tactical online operational...
Synthetic aperture radar (SAR) raw signal simulation is very useful for validating SAR system design parameters, for testing the effectiveness of different processing algorithms, and for other applications. If a nominal sensor rectilinear line of flight is assumed, frequency domain raw signal simulation can be used to generate the raw data with high efficiency compared with time domain simulation...
In this paper we consider the charged particle which moves by a trajectory describing by the Lorenz-like system of equation. Of course, because of non-zero acceleration this particle can be considered as a source of electromagnetic radiation. Such a radiation allows to investigate the system under consideration in the case when the system as itself is unobservable. This fact allows to obtain an interesting...
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