The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Routing is one of the main challenges that Aeronautical Ad-hoc NETworks (AANETs) are facing, mostly because of the mobility of the nodes, the geographic size of the network and the number of nodes. To handle this problem, we propose in this paper an innovative routing algorithm called NoDe-TBR (Node Density-TBR), derived from Trajectory-Based Routing (TBR). In this routing algorithm, each aircraft...
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...
Continuous Descent Operations (CDO) with Controlled Times of Arrival (CTA) at one or several metering fixes could enable environmentally friendly procedures without compromising airspace capacity. Extending the current capabilities of state-of-the-art Flight Management Systems (FMS), the Time and Energy Managed Operations (TEMO) concept is able to generate optimal descent trajectories with an improved...
This paper describes conflict resolution trials on worst case situations. Instead of using natural trajectories from real traffic scenarios, this paper investigates the solution of super-conflicts. These are generated by scheduling multiple aircraft through one common 4-dimensional point. All generated aircraft are planned to have identical latitude, longitude and altitude position for one moment...
NASA is collaborating with the FAA and aviation industry to develop and demonstrate new capabilities that integrate arrival, departure, and surface air-traffic operations. The concept relies on trajectory-based departure scheduling and collaborative decision making to reduce delays and uncertainties in taxi and climb operations. The paper describes the concept and benefit mechanisms aimed at improving...
After introducing the concept of airstream as a special corridor organization, this paper proposes a design method to establish a network of such air corridors over a given geographic area. A case study involving East Asia is displayed.
In order to efficiently and robustly land more aircraft on two parallel runways, search the conflict-free and less-delay reroute for arrival aircraft, we plan to control arrival aircraft with a novel trajectory operation model named Multi-layer Point Merge System (ML-PM). In this paper, firstly the notional example of ML-PM system is introduced, the characteristics of its horizontal and vertical profiles...
Wind optimal trajectory planning is a critical issue for airlines in order to save fuel for all their flights. This planning is difficult due to the uncertainties linked to wind data. Based on the current weather situation, weather forecast institutes compute wind maps prediction with a given level of confidence. Usually, 30–50 wind maps prediction can be produced. Based on those predictions, airlines...
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...
The introduction of dedicated software functions for separation assurance and collision avoidance in Next Generation Flight Management Systems (NG-FMS) has the potential to enable significant advances in the Unmanned Aircraft System (UAS) Traffic Management (UTM) operational context. In this paper, key elements of the NG-FMS architecture are presented that allow planning and optimisation of 4-dimensional...
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...
This paper deals with an elimination of jamming optoelectronic seekers by flares. It is predominantly focused on the design and testing of the method of object discrimination for imaging infrared seeker. To design this method, an analysis of capability of imaging infrared seekers to discriminate objects according to their shape was used. On the basis of the results of this analysis, the principle...
Airspace Navigation Service Providers (ANSPs), are looking forward to transforming their operations to better meet the increased demand for Air Traffic Control (ATC) services and to also provide increased efficiencies for users and service providers. One of the major transformations in this domain that is expected to occur over the next decade is a shift from current flight plan based operations towards...
Nowadays Air Traffic Management (ATM) requires high accuracy performance to respect time constraints at specific waypoints and to sequence the traffic flow especially while climbing and landing, in order to increase reliability and safety. Current civil aviation guidance systems proposed real-time control laws to track the reference trajectories provided by the Flight Management System (FMS) while...
Chebfun is an extension to MATLAB that enables problems with continuous functions and operators to be solved with simple, concise coding and near machine accuracy. Thus it has potential to be useful in solving optimal control problems. Its capabilities for this are explored in this paper and a direct method for solving optimal control problems using chebfuns is described. The approaches are demonstrated...
This paper assesses the potential fuel savings benefits that can be gained from wind optimal flight trajectories. This question is posed on a 3 dimensional fixed flight network consisting of discrete waypoints which is representative of the size of Europe. The optimisation implements Dijkstra's shortest path algorithm to compute the minimum fuel burn route through a network and compares this to the...
In air traffic control (ATC), aerial vehicles normally travel within scheduled route channels with certain probabilities. Exploitation of the probability-constrained route information intuitively will lead to enhancement of tracking accuracy and tracking continuity. This paper presents an ATC tracking approach by incorporating such information to improve the estimation performance accordingly. First,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.