An operating concept and required system components for trajectory-based operations with air/ground data link for today’s en route and transition airspace is proposed. Controllers are fully responsible for separation as they are today, and no new aircraft equipage is required. Trajectory automation computes integrated solutions to problems like metering, weather avoidance, traffic conflicts and...

Funding for this work was provided by the Advanced Air Transportation Technologies (AATT) project office of NASA's Airspace Systems Program. This paper presents a concept – with the potential for increasing airspace system-wide efficiency and safety – which combines strategic, 4-D userpreferred trajectories with tactical, Airborne Separation Assistance Systems (ASAS). First, prior research and ...

the study of flight vehicle structures reveals the importance of obtaining the most suitable accuracy compatible with construction. for this purpose, several experiments were conducted at the agard institute. in this paper the results of one such experiment performed on a sample airplane wing are presented. aircraft structural engineers use several methods to model these structures. specifing h...

As Air Traac keeps increasing, many research programs focus on collision avoidance techniques. In this paper, a neural network learned by genetic algorithm is introduced to solve connicts between two aircraft. The learned NN is then tested on diierent connicts and compared to the optimal solution. Results are very promising. 1 Air Traac Control and Collision Avoidance As Air Traac keeps increas...

An optimization model for a scheduling problem for closely spaced parallel approaches has been formulated. It takes temporal, pairing, sequencing, separation route and grouping constraints into account. Simulations investigated possible advantages of advanced scheduling methods over first-come-firstserved scheduling. Also, this study evaluated the performance differences between the computation...

This article proposes a new approach for centralized path planning of multiple aircraft in presence of the obstacle-laden environment under low flying rules. The problem considers as a unified nonlinear constraint optimization problem. The minimum time and control investigate as the cost functions and the maximum velocity and power consider as the constraints. The pseudospectral method applies ...

Results of a numerical simulation are presented to determine the feasibility of estimating the location and strength of a wake vortex from imperfect in-situ measurements. These estimates could be used to provide information to a pilot on how to avoid a hazardous wake vortex encounter. An iterative algorithm based on the method of secants was used to solve the four simultaneous equations describ...

Advanced aircraft noise abatement approach procedures -characterized by decelerating, continuous descent approaches using idle thrust, and enabled by flight guidance technologies such as GPS and FMS -have been shown to reduce operational aircraft noise on communities surrounding airports. However, implementation in the near future presents two challenges. The first is to mitigate the adverse ef...