Due to an anticipated increase in air traffic during the next decade, air traffic control in busy airports is one of the main challenges confronting controllers in the near future. Since the runway is often a bottleneck in an airport system, there is great interest in optimizing usage of the runway. Our study first presents a brief review of the aircraft landing problem. A model for the problem...

This paper describes research into automated support for air tra c controllers performing tactical air tra c management. It describes the OASIS system developed to help alleviate air tra c congestion. The system achieves this by maximizing runway utilization, achieved through arranging landing aircraft into an optimal order, assigning them a landing time, and then monitoring the progress of eac...

The rational flight landing sequence has very important influence on the service of airlines, airports and air traffic controller. The discrete optimization problem can be seen as one machine scheduling problem with distinct starting and finishing time and the objective: the minimization of tardy flight problem. Because of this NP-hard complexity, ant colony optimization (ACO) is utilized to so...

We use a mathematical model based on hybrid automata theory to describe air traffic flow in arrival mgions near airports. We show that the problem of scheduling the arrival flow subject to airspace and airport metering constraints may he formulated as a Mized Integer Linear Pmgmm (MILP). We demonstrate an implementation of this program, which accepts Air %fie Contml (ATC) data, performs the sch...

The NASA goal of reducing external aircraft noise by 10 dB in the near-term presents the acoustics community with an enormous challenge. This report identifies technologies with the greatest potential to reduce airframe noise. Acoustic and aerodynamic effects will be discussed, along with the likelihood of industry accepting and implementing the different technologies. We investigate the lower ...

A tire and landing gear test facility has been developed and incorporated into a Convair 990 aircraft. The system can simulate tire vertical load profiles to 250,000 lb, sideslip angles to 15 degrees, and wheel braking on actual runways. Onboard computers control the preprogrammed test profiles through a feedback loop and also record three axis loads, tire slip angle, and tire condition. The ai...