Performance comparison between TEMO and a typical FMS in presence of CTA and wind uncertainties

Abstract

Abstract-Continuous Descent Operations (CDO) with Controlled Times of Arrival (CTA) at one or several metering fixes could enable environmentally friendly procedures without compromising airspace capacity. Extending the current capabilities of state-of-the-art Flight Management Systems (FMS), the Time and Energy Managed Operations (TEMO) concept is able to generate optimal descent trajectories with an improved planning and guidance strategy to meet CTA. The primary aim of this paper is to compare the performances of TEMO (in terms of fuel consumption and time error) with respect to a typical FMS, that is an FMS without re-planning mechanism during descent based on time or altitude errors. The comparison is performed through simulation, using an A320-alike simulation model and considering several scenarios in presence of CTA and wind uncertainties. Results show that TEMO is capable of guiding the aircraft along a minimum fuel trajectory still complying with a CTA, even if significant wind prediction errors are present. For a same scenario, a typical FMS without re-planning capabilities or tactical time-error nulling mechanism during the descent, would miss the CTA in most cases.

Energy-Efficient Arrival with RTA Constraint for Multirotor eVTOL in Urban Air Mobility

“…A few groups have worked on commercial jetliners for fuel-efficient and noise-abatement arrivals [16][17][18][19][20][21][22][23][24]; however, according to our knowledge, little research work has been carried out for the energy-efficient arrival under time-constrained environment for eVTOLs in UAM. This paper aims to fill this gap to enable safe and efficient multirotor eVTOL operations given limited vertiport capacity and eVTOL battery endurance.…”

Comparison of Various Guidance Strategies to Achieve Time Constraints in Optimal Descents

“…In a previous work [17], this guidance technique was compared with the guidance implementation on a typical FMS that does not correct time errors, showing superior performances in terms of fuel consumption and RTA compliance.…”

Energy Efficient Arrival with RTA Constraint for Urban eVTOL Operations

“…A few groups such as in Georgia Tech, Purdue University, NASA Ames, and Polytechnic University of Catalonia have worked on commercial jetliners continuous descent operations for energy efficient arrival. [7][8][9][10][11][12][13][14] However, according to our knowledge, no significant research work has been carried out for the energy efficient arrival under time constrained environment for the eVTOL air taxis in the UTM or UAM context. This paper aims to fill this gap to enable safe and efficient eVTOL operations given limited vertiport capacity and eVTOL battery endurance.…”