A full six degrees of freedom (6-DOF) simulation flight dynamics model is applied for the accurate prediction of short and long range trajectories of high and low spin-stabilized projectiles and small bullets via atmospheric flight to final impact point. The projectile is assumed to be both non-flexible and rotationally symmetric about its spin axis launched at low and high pitch angles. The pr...

Fundamental characteristics of decentralized separation control in a high density air corridor are discussed. A high density air corridor is expected to be an air space where aircraft capable of airborne self-separation are allowed to fly into the same direction. Some decentralized control algorithms are indispensable for its operational safety and a large traffic throughput. In this study two ...

This document is disseminated under the sponsorship of the Department of Transportation in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. Surveillance in today's National Airspace System (NAS) is provided by a system of terminal and en route radars. The separation distance that an air traffi c controller is required to ma...

this research, for the first time presents the flexible flow shop model of scheduling method for considering runway assignment and operations planning together. one of the advantages of the developed model is considering the procedures of air routes in terminal airspace and separation between consecutive aircraft which is very similar to the real world condition. there are different objective f...

ai = time aircraft i lands after the preferred landing time Pi (i 1; . . . ; N) bi = time aircraft i lands before the preferred landing time Pi (i 1; . . . ; N) C = cost coefficient vector defined in the linear programming problem Ei = earliest landing time for aircraft i (i 1; . . . ; N) fi = penalty cost per unit of time if aircraft i lands before the preferred landing time Pi (i 1; . . . ; N...

This paper summarizes the methods and results from our analyses of the ERASMUS 1 autonomous strategic deconfliction concept. An international team of researchers from R&D labs and universities across Europe and the US generated conclusive performance results via real-time and fast time simulations and human-in-the-loop experiments during a 30month study of the impact that machine-generated, sub...

Airborne separation assurance is a key requirement for free flight operations. This paper investigates the feasibility of airborne separation assurance for free flight by evaluating the performance of Conflict Detection and Resolution (CD&R) schemes in a simulated air traffic environment. Two qualitatively different CD&R methods were evaluated in an air traffic simulation environment provided b...

Introduction of Unmanned Aircraft Systems (UAS) into positively controlled airspace may cause greater per-aircraft impact on the National Airspace System than existing traffic because UAS aerodynamic performance and mission types are often different from aircraft that typically fly in positively controller airspace (i.e. commercial passenger traffic). This paper examines the impact new UAS oper...

A flight deck display that allows the pilot to “see” the neighboring aircraft, as well as its wake, may allow for a decrease in spacing and an increase in airport and airspace capacity, while maintaining safe separation distances from wake vortices. This research evaluates a model based on aircraft parameters that are readily available in flight to predict aircraft wake vortices in real time. U...

The main goal of this research is to investigate minimum fuel descent trajectories for various types of aircraft and consider appropriate arrival sequencing based on the acquired results. First, the validity of a point mass model to find optimized descent trajectories in order to obtain minimal fuel consumption is confirmed. Through single aircraft numerical simulations, the principle “higher f...