Aircraft Take-Off Rejection Speed for Engine Event Decisions
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Solution Overview
Problem
During aircraft take-off, engine-related events require rapid decision-making by pilots on whether to continue or abort the take-off, with existing technologies lacking efficient methods to determine safe stopping distances based on various parameters.
Innovation Solution
A system that detects engine-related events and compares the aircraft's speed to a take-off rejection speed threshold, determined through deceleration simulations, to generate a recommendation on whether to continue the take-off, using a look-up table based on aircraft parameters such as weight and runway length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pilots make manual decisions on whether to continue take-off based on engine events, then decision accuracy may be improved, but response time deteriorates due to the time required for human judgment
Solution Approach 1:
The patent introduces an automated decision support system that acts as an intermediary between the engine event detection and the pilot's final decision. The system calculates take-off rejection speeds based on aircraft parameters and compares actual speed against this threshold, providing an objective recommendation to the pilot. This mediator eliminates the need for pilots to perform complex mental calculations under stress, maintaining decision accuracy while significantly reducing response time.
Solution Approach 2:
The system performs preliminary calculations of the take-off rejection speed threshold before the actual take-off event occurs. By pre-computing the deceleration characteristics based on aircraft weight, runway conditions, and other parameters, the system has the decision criterion ready immediately when an engine event occurs, eliminating calculation time during the critical decision moment.
2Measurement precision
If complex calculations are performed to determine safe stopping distances, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system pre-calculates deceleration characteristics and stores them in lookup tables or pre-computed databases during system initialization or before flight. When an engine event occurs, the system simply retrieves the pre-computed take-off rejection speed based on current aircraft parameters rather than performing complex real-time integration of deceleration equations. This maintains high precision while dramatically reducing computational complexity during the critical decision moment.
Solution Approach 2:
The patent uses pre-computed models and lookup tables that represent the complex deceleration physics in simplified form. Instead of calculating actual stopping distances from first principles during flight, the system uses pre-determined relationships between aircraft parameters and safe rejection speeds, maintaining accuracy while reducing computational burden.
Data Source
AI summary
An aircraft includes an engine and a system that is configured to detect an event associated with the engine during a take-off. The system is further configured to determine a speed of the aircraft a particular time after the event and to determine a remaining distance between the aircraft and an end of a runway at the particular time. The system is also configured to compare the speed of the aircraft to a take-off rejection speed threshold. The take-off rejection speed threshold indicates a maximum aircraft speed that would result in the aircraft stopping prior to a particular distance from the end of the runway. The take-off rejection speed threshold is selected from a plurality of aircraft speeds generated during aircraft deceleration simulations. The system is also configured to generate an indication recommending whether to continue the take-off based on comparison.