Aircraft Runway Braking Sequence for Real-Time Overrun Control
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Solution Overview
Problem
Aircraft runway overruns, particularly longitudinal overruns, are frequent due to poor management of braking means during degraded meteorological conditions, as existing systems lack automated and integrated control of braking mechanisms, relying heavily on pilot experience.
Innovation Solution
A system that calculates and dynamically updates a sequence of braking means usage based on aircraft and external data to control the aircraft's position on a runway, integrating thrust reversers, landing gears, and air brakes, with real-time adjustments to ensure the aircraft stops within a predetermined braking distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automated braking control is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple braking means (thrust reversers, spoilers, wheel brakes) and their control systems into a single integrated automated braking system. The control unit receives inputs from various sensors and automatically coordinates all braking mechanisms, merging previously independent manual controls into one unified automated system that improves reliability while managing complexity through integration.
Solution Approach 2:
The automated braking system operates autonomously without requiring pilot intervention during critical deceleration phases. The control unit automatically calculates optimal braking sequences, monitors aircraft deceleration in real-time, and adjusts braking forces based on runway conditions and aircraft performance, enabling the system to serve itself and eliminate human error in braking management.
2Productivity
If real-time updates of braking sequence are implemented, then productivity is improved, but use of energy increases
Solution Approach 1:
The control unit performs periodic updates of the braking sequence at predetermined time intervals or at specific deceleration milestones rather than continuously. This periodic recalculation allows the system to maintain high deceleration efficiency by adapting to changing conditions while reducing computational energy consumption by keeping the processing load intermittent rather than continuous.
Solution Approach 2:
The system pre-calculates optimal braking sequences based on initial conditions (aircraft weight, runway length, weather forecasts) before landing. These preliminary calculations provide a baseline braking plan that is then minimally adjusted in real-time, reducing the frequency and intensity of energy-consuming recalculation operations while maintaining high deceleration efficiency.
3Reliability
If integrated control of multiple braking means is implemented, then reliability is improved, but ease of operation decreases
Solution Approach 1:
The patent extracts the complex decision-making and coordination functions from the pilot's operational tasks and transfers them to the automated control unit. The pilot's role is reduced to initiating the automated system and monitoring its operation, while the control unit handles the complex integration of multiple braking means, thereby improving reliability without requiring the pilot to manage the complexity of coordinating thrust reversers, spoilers, and wheel brakes.
Data Source
AI summary
A system for managing the deceleration of an aircraft enabling the control in real time of the position of the aircraft on a braking axis, includes a braking system; a calculator configured to: calculate, from aircraft data and from external data, a sequence of use of the braking system intended to brake the aircraft over a predetermined braking distance which associates a predetermined position on the braking axis with each braking instant; update in real time the sequence of use as a function of the difference between the position of the aircraft and the predetermined position; and a controller configured to control the braking system as a function of the sequence of use.