Aircraft Brake Cooling Time Estimation Using Decay Coefficients
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Solution Overview
Problem
Current methods for estimating the cooling time of aircraft brakes after use are inefficient, often leading to wasted time or compromised safety due to the complexity of thermodynamic models and reliance on constant power supply, and do not accurately account for varying environmental conditions.
Innovation Solution
A system comprising a processor and memory that calculates the estimated cooling time of aircraft brakes by determining the peak temperature and temperature decay coefficient, using an exponential cooling profile equation, and adjusts for elapsed time with a low-pass filter, allowing for accurate and efficient estimation of when brakes have cooled to a safe temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed period of time is waited between landing and take-off, then brake safety is ensured, but time is wasted as brakes may cool earlier than necessary
Solution Approach 1:
The system changes the parameter from a fixed time wait to a dynamic time estimate based on measured brake temperature, ambient temperature, and calculated cooling rate. This allows the wait time to be optimized for each specific condition, ensuring safety while minimizing wasted time.
Solution Approach 2:
The system uses feedback from brake temperature sensors to continuously monitor the cooling process and adjust the estimated cooling time accordingly. This closed-loop approach ensures that the predicted cooling time accurately reflects actual brake conditions, preventing both premature take-off and excessive waiting.
2Measurement precision
If complex thermodynamic models are used to estimate cooling time, then accuracy is improved, but computational complexity and power requirements increase
Solution Approach 1:
The system changes the approach from using full complex thermodynamic models to using a simplified model with key parameters (temperature difference, cooling rate coefficient). This reduction in parameter complexity maintains sufficient accuracy for the application while dramatically reducing computational requirements.
Solution Approach 2:
The system extracts only the essential parameters needed for cooling time estimation from the full thermodynamic model, discarding unnecessary complexity. By focusing on the critical factors (temperature differential and cooling rate), the system achieves practical accuracy without the computational burden of complete thermodynamic analysis.
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
This solution provides a reliable and efficient method for determining the cooling time of aircraft brakes, reducing the risk of brake malfunction during take-off and minimizing time wastage, while being less computationally intensive and adaptable to changing environmental conditions.
Implementation Method 1
brakes convert kinetic energy of a moving vehicle into, among other things, thermal energy
Implementation Method 2
determining a temperature decay coefficient (α) of the brake assembly, calculating an estimated total time to cool the brake assembly to a predetermined temperature based on the peak brake assembly temperature and an ambient temperature data
Data Source
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AI summary
Systems and methods for estimating the cooling time of a brake assembly are disclosed. Various systems and methods may include receiving a temperature of a brake assembly, determining a peak brake assembly temperature, determining a temperature decay coefficient ("α") of the brake assembly, calculating an estimated total time to cool the brake assembly to a predetermined temperature based on the peak brake assembly temperature and an ambient temperature data, and adjusting the estimated total time to cool the brake assembly to the predetermined temperature based on an amount of time elapsed after the receiving the temperature of the brake assembly.