Aviation

Eulerian Trilogy

Sun, Dengfeng
Yang, Samuel
Bayen, Alexandre M.
2012

MILP Control of Aggregate Eulerian Network Airspace Models

Robelin, C.-A.
Sun, Dengfeng
Wux, Guoyuan
Bayen, Alexandre M.
2006

A new Eulerian model of airspace is derived and applied to high altitude traffic for a full air traffic control center of the National Airspace System. The Eulerian model is reduced to a linear time invariant dynamical system, in which the state is a vector of aggregate aircraft counts. The model is validated against ASDI data and applied to the Oakland airspace. The problem of controlling sector aircraft count is posed as an integer program, in which the dynamical system appears in the constraints. To improve the computational time of calculating the solution, the integer program is...

Continuous Adjoint Method for Air Traffic Flow Management

Strub, Issam S.
Bayen, Alexandre M.
2006

This article develops a model of air traffic flow using an Eulerian description with hyperbolic partial differential equations. Existence and uniqueness (well-posedness) of a solution to the system of partial differential equations on a network is established. Subsequently, an optimal control problem is studied with the junction coefficients as control variables. We use a continuous adjoint approach and we implement it on a network with 16 links and 5 junctions, demonstrating the computational efficiency of this method

Comparison of the Performance of Four Eulerian Network Flow Models for Strategic Air Traffic Management

Sun, Dengfeng
Strub, Issam
Bayen, Alexandre M.
2007

Four Eulerian network models are implemented to model high altitude air traffic flow. Three of the models use the framework of discrete time dynamical systems, while the fourth consists of a network of partial differential equations. The construction of these models is done using one year of air traffic data. The four models are applied to high altitude traffic for six Air Route Traffic Control Centers in the National Airspace System and surrounding airspace. Simulations are carried out for a full day of data for each of the models, to assess their predictive capabilities. The models’...

Convex Formulations of Aggregate Network Air Traffic Flow Optimization Problems

Work, Daniel B.
Bayen, Alexandre M.
2008

The problem of regulating air traffic in the en route airspace of the national airspace system is studied using an Eulerian network model to describe air traffic flow. The evolution of traffic on each edge of the network is modeled by a modified Lighthill-Whitham-Richards partial differential equation. We pose the problem of optimal traffic flow regulation as a continuous optimization program in which the partial differential equation appears in the constraints. The equation is transformed with a variable change which removes t nonlinearity in the control variables and enables us to use...