Title page for ETD etd-04012004-195501

Type of Document Master's Thesis
Author Sen, Debayan
Author's Email Address dsen@vt.edu
URN etd-04012004-195501
Title A bi-level system dynamics modeling framework to evaluate costs and benefits of implementing Controller Pilot Data Link Communications and Decision Support Tools in a non-integrated and integrated scenario
Degree Master of Science
Department Civil Engineering
Advisory Committee
Advisor Name Title
Trani, Antoino A. Committee Chair
Baik, Hojong Committee Member
Teodorovic, Dusan Committee Member
  • Modeling
  • Benefit cost analysis
  • Simulation
  • Data link
  • Systems dynamic
  • Air traffic management
  • URET
  • TMA
Date of Defense 2003-12-23
Availability restricted
A modeling framework to evaluate the costs and benefits of implementation of Con-troller

Pilot Data Link Communication (CPDLC), and Air Traffic Management (ATM)

decision support tools is proposed in this paper. The benefit/cost evaluation is carried

out for four key alternatives namely alternative A: Do nothing scenario (only voice

channel), alternative B: Voice channel supplemented with CPDLC, alternative C:

Alternative B with ATM tools in a non-integrated scenario and finally alternative D:

Alternative B with ATM tools in an integrated scenario. It is a bi-level model that cap-tures

the linkages between various technologies at a lower microscopic level using a

daily microscopic model (DATSIM) and transfers the measures of effectives to a

higher macroscopic level. DATSIM stands for Data Link and Air Traffic Technologies

SIMulation and it simulates air traffic in the enroute sector and terminal airspace for a

single day and captures the measures of effectiveness at a microscopic level and feeds

its output to the macroscopic annual model which then runs over the entire life cycle of

the system. Airspace dwell time benefit data from the microscopic model is regressed

into three dimensional benefit surfaces as a function of the equipage level of aircraft

and aircraft density and embedded into the macroscopic model. The main function of

the annual model is to ascertain economic viability of any deployment schedule or

alternative over the entire life cycle of the system. The life cycle cost model is com-posed

of four modules namely: Operational benefits module, Safety benefit module,Technology cost module and Training cost module.

Analysis using the model showed that an enroute sector gets congested at aircraft den-sities

greater 630 per day. This is mainly because the controller workload gets satu-rated

at that traffic volume per day. Benefits realized in alternatives B, C and D as

compared to alternative A increased exponentially at traffic densities greater than 630

i.e. when controller workload for alternative A becomes saturated.

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