Aircraft Automatic Braking Alerting for Runway Excursion Risk
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Solution Overview
Problem
Current aircraft braking systems lack awareness of the topographical reality of the landing strip during landing, leading to a risk of longitudinal exit, especially under adverse weather conditions, and rely solely on pilot experience for managing this risk.
Innovation Solution
A method and device that alert the crew to the risk of longitudinal exit by comparing the selected braking mode with the maximum mode and automatically adjusting it if necessary, using visual and audible alerts, and providing symbology on a cockpit display to illustrate the minimum braking distance relative to the runway length, while inhibiting alerts during critical phases of flight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the crew manually manages braking mode selection based on experience and training, then operational flexibility is maintained, but the risk of runway excursion increases under adverse weather conditions
Solution Approach 1:
The system continuously monitors the selected braking mode and compares it against the actual landing conditions (weather, runway state, aircraft performance) to detect when the selected mode is insufficient. This feedback loop enables the system to issue alerts or automatically adjust the braking mode, thereby reducing runway excursion risk while maintaining operational flexibility through crew awareness and control.
Solution Approach 2:
The automatic braking system performs self-assessment of its selected braking mode by evaluating whether the current mode is adequate for the given conditions. When the system detects that the selected braking mode is insufficient, it can automatically adjust the braking intensity or alert the crew, enabling the system to serve itself in monitoring and adjusting its own operation without complete reliance on manual crew management.
2Reliability
If the automatic braking system operates without awareness of landing strip topography and conditions, then system simplicity is maintained, but the risk of longitudinal exit from the runway increases
Solution Approach 1:
The automatic braking system is enhanced to perform multiple functions: it not only controls braking but also monitors landing conditions, assesses its own selected braking mode adequacy, and adjusts operations accordingly. This multi-functionality enables the system to gain awareness of landing strip conditions and topography without requiring separate dedicated systems, thereby reducing longitudinal exit risk while limiting the increase in overall device complexity.
Solution Approach 2:
The system introduces an intermediary assessment layer that bridges the gap between the simple automatic braking control and the complex landing strip topography awareness. This intermediary layer processes landing conditions and braking mode information to determine adequacy, enabling the system to operate with enhanced awareness while maintaining relative simplicity through integrated processing rather than adding separate complex subsystems.
3Reliability
If the crew selects an insufficient braking mode to maintain comfort, then passenger comfort is improved, but the risk of leaving the track increases significantly
Solution Approach 1:
The system performs preliminary assessment of the selected braking mode before landing to predict whether it will be sufficient for the given conditions. By detecting potential insufficiency in advance, the system can issue alerts or automatically adjust the braking mode before the landing occurs, thereby preventing track departure while allowing the crew to be informed of the trade-off between comfort and safety so they can make informed decisions.
Solution Approach 2:
The system takes preliminary action by assessing the adequacy of the selected braking mode and preparing appropriate responses (alerts or automatic adjustments) before the actual landing and braking occur. This preliminary action ensures that if the selected braking mode is insufficient, corrective measures are already in place or being implemented, thereby preventing track departure while maintaining passenger comfort through smooth, pre-planned braking adjustments.
Data Source
Figure 1
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Figure 3~4
AI summary
Method and device for aiding the piloting of an aircraft during a landing phase. The device (1) comprises means (13) for alerting the crew, during a landing, of the selecting of an insufficient braking mode on an automatic braking system (3).