Aircraft Landing Deceleration Profile for Target Runway Exit
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Solution Overview
Problem
Current methods for reducing aircraft runway occupancy time during landing are inefficient, leading to increased air traffic congestion, safety risks, and environmental impacts due to prolonged circling and fuel consumption, as they do not fully optimize deceleration and exit speed adjustments.
Innovation Solution
A method and system that calculate a target ground distance as a function of a deceleration profile with a constant deceleration portion and transient portions to guide the aircraft to a target exit point at a predetermined taxi speed, optimizing runway occupancy time and passenger comfort by automatically adjusting deceleration levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If automatic regulation of deceleration is implemented to reach target exit point at predetermined speed, then runway occupancy time is reduced, but device complexity increases due to variable intensity braking requirements
Solution Approach 1:
The deceleration process is divided into distinct phases: a first phase with initial deceleration after touchdown, and a second phase with constant deceleration rate. This segmentation allows the system to manage complexity by treating different deceleration requirements as separate, manageable segments rather than continuous variable adjustment.
Solution Approach 2:
The patent changes the deceleration parameter from a continuously variable intensity to a discrete two-phase structure with specific deceleration rates. The second phase uses a constant deceleration rate that is different from the first phase, simplifying the control mechanism while achieving the target exit speed and time optimization.
2Loss of time
If deceleration is adjusted to optimize exit speed at target exit point, then runway occupancy time is reduced, but passenger comfort deteriorates due to variable deceleration intensity
Solution Approach 1:
The patent introduces a constant deceleration rate in the second phase that is specifically designed to provide passenger comfort. This constant rate, which differs from the initial deceleration phase, maintains a smooth and predictable braking experience for passengers while still achieving the optimization of runway occupancy time and exit speed.
3Reliability
If heavy air traffic is managed with traditional landing methods, then safety is maintained, but productivity decreases due to increased holding circuits and circling
Solution Approach 1:
The system performs preliminary calculation of the optimal deceleration profile and target exit point before the aircraft actually lands. This advance planning allows the aircraft to execute a precise deceleration sequence, reducing the need for holding circuits and circling in heavy traffic conditions, thereby increasing air traffic throughput while maintaining safety.
Solution Approach 2:
The patent incorporates feedback mechanisms that monitor the aircraft's deceleration progress and adjust the braking sequence to ensure the target exit point is reached at the predetermined speed. This feedback control maintains safety by preventing premature or delayed exit while optimizing productivity by reducing holding circuits and circling maneuvers.
Data Source
AI summary
A method for assisting an aircraft in landing on a runway and an associated system includes determining a target exit point from the runway and a target taxi speed at which the aircraft has to take the target exit; calculating a target ground distance representative of a ground deceleration phase; and calculating the position of a target touchdown point on the basis of the target ground distance. The target ground distance is calculated as a function of a target deceleration profile for the aircraft to reach the target exit point at the target taxi speed.