Aircraft Tire Pressure Correction Using Stable Temperature Points
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Solution Overview
Problem
Current methods for monitoring aircraft tire pressure are unreliable due to the need for tires to reach ambient temperature, which can take a long time, especially when turnaround times are short, and automated systems face challenges in accurately measuring tire gas temperature indirectly.
Innovation Solution
A computer-implemented method that identifies stable points in historical tire pressure and temperature data to determine accurate tire gas pressure and temperature, allowing for reliable tire maintenance without the need for tires to reach ambient temperature, using a recent stable point and deflation rate to calculate corresponding pressures and temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If tire pressure is measured when the tire is hot (above ambient temperature), then the measurement can be performed sooner after aircraft use, but the measured pressure is inaccurate and does not reflect the true tire inflation status
Solution Approach 1:
The system transforms the measurement approach by changing the reference parameter from direct hot pressure measurement to temperature-corrected pressure calculation. By measuring both temperature and pressure and then correcting the pressure reading to what it would be at ambient temperature, the system maintains measurement accuracy while eliminating the cooling wait time requirement
Solution Approach 2:
The system performs preliminary measurement of both temperature and pressure while the tire is still hot, then applies a correction calculation to determine the equivalent ambient temperature pressure. This preliminary action captures the data before cooling occurs, eliminating the need to wait for the tire to cool while still providing accurate baseline pressure information
2Productivity
If automated pressure sensing devices use indirect temperature measurement through wheel-mounted sensors, then the system can continuously monitor temperature, but the temperature reading does not accurately reflect the actual tire gas temperature
Solution Approach 1:
The system uses the wheel-mounted temperature sensor as an intermediary that indirectly indicates tire gas temperature. By combining this intermediary temperature reading with pressure measurements and applying thermal relationship calculations, the system derives the actual tire gas temperature, reconciling continuous monitoring capability with measurement accuracy
Solution Approach 2:
The system uses feedback from the indirect temperature sensor readings to continuously adjust and refine the estimated tire gas temperature. By monitoring the relationship between wheel temperature and calculating corresponding gas temperatures over time, the system maintains accurate temperature information for pressure correction without requiring direct gas contact sensors
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables proactive and accurate tire maintenance by determining tire pressure and temperature without waiting for tires to cool, improving safety and reducing operational constraints by using historical data to normalize pressure measurements and account for deflation rates.
Implementation Method 1
determining the corresponding tire gas pressure based on the data of the recent stable point and the desired tire gas temperature
Data Source
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AI summary
A computer implemented method of determining a tire pressure. The method comprises: receiving (802) data of a recent stable point comprising both a tire gas pressure and a temperature; receiving (804) data of a desired temperature, at which a current pressure is desired to be determined; and determining (806) the current pressure based on the data of the recent stable point and the desired temperature.