Aircraft Fuel Level Estimation Using Phase-Specific Drag Factors
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Solution Overview
Problem
Current systems for estimating aircraft fuel levels during flight fail to accurately account for aeroelastic effects caused by changing fuel levels and do not consider the different phases of flight, leading to fuel estimate inaccuracies and potential flight diversions.
Innovation Solution
A system and method that utilize a control unit to determine drag factors and fuel flow factors for different phases of prior flights, allowing for accurate fuel level estimation in upcoming flights by adjusting for drag polar aeroelastic effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single set of factors is applied to an entire flight for flight planning computations, then the computation process is simple, but fuel estimate accuracy deteriorates
Solution Approach 1:
The flight is divided into multiple phases (takeoff, climb, cruise, descent, approach) with distinct drag factors and fuel flow factors for each phase. This segmentation allows the system to account for varying aerodynamic conditions throughout the flight, improving fuel estimate accuracy while maintaining computational manageability through structured phase-based processing.
2Device complexity
If aeroelastic effects are not accounted for, then the system is simpler, but fuel estimate accuracy deteriorates
Solution Approach 1:
The system dynamically adjusts drag factors and fuel flow factors based on changing flight conditions, including aeroelastic effects caused by varying fuel levels in wing tanks. By modifying these parameters according to actual flight phase and fuel consumption patterns, the system achieves accurate fuel estimates while managing complexity through data-driven parameter adjustments.
3Reliability
If fuel consumption is overestimated, then flight safety is improved, but unnecessary flight diversions increase
Solution Approach 1:
The system uses feedback from actual flight data and historical performance to continuously refine fuel consumption predictions. By comparing estimated fuel usage with actual consumption patterns and adjusting drag factors accordingly, the system achieves both safety and efficiency, reducing unnecessary diversions while maintaining adequate fuel reserves.
Data Source
AI summary
A system and a method include a control unit configured to determine drag factors and fuel flow factors for different phases of one or more prior flights of an aircraft, and determine a fuel level for one or more upcoming flights of the aircraft based on the drag factors and the fuel flow factors for the different phases of the one or more prior flights of the aircraft.