Aircraft Wheel Braking Control With Speed-Based Command Correction
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Solution Overview
Problem
Conventional aircraft braking systems experience suboptimal performance at high speeds and risk damage to brake structures at low speeds due to constant braking control, which affects overall braking efficiency and equipment longevity.
Innovation Solution
A dynamic correction method is applied to the braking command based on wheel speed, multiplying the braking command by a correction coefficient that varies with speed, ensuring optimal braking torque distribution by increasing at high speeds and reducing at low speeds to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If constant braking control is used, then braking simplicity is maintained, but braking performance at high speed deteriorates and brake damage risk at low speed increases
Solution Approach 1:
The braking command is dynamically adjusted based on real-time wheel speed feedback. A dynamic correction term is added to the basic braking command, where the correction magnitude varies with wheel speed. This creates a dynamic braking control system that automatically adapts to changing speed conditions, improving both high-speed performance and low-speed safety without requiring complex manual intervention
Solution Approach 2:
The system continuously monitors wheel speed and uses this feedback to modify the braking command in real-time. The dynamic correction term is calculated as a function of the difference between current and reference wheel speeds, creating a closed-loop feedback mechanism that automatically compensates for speed variations and prevents brake damage while maintaining performance
2Device complexity
If constant braking control is used, then control system complexity is reduced, but braking performance at high speed is insufficient
Solution Approach 1:
The braking command evolves from a static constant value to a dynamic expression that includes a speed-dependent correction term. The correction term is proportional to the difference between reference and actual wheel speeds, creating a dynamically adjusted braking force that optimizes performance across different speed ranges while adding minimal computational complexity
Solution Approach 2:
The braking command parameters are changed based on wheel speed conditions. The dynamic correction term introduces a speed-dependent parameter adjustment that increases braking effectiveness at high speeds. This parameter change approach maintains relatively simple control logic while significantly improving braking performance through adaptive parameter tuning
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 approach enhances braking performance at high speeds and reduces the risk of brake damage at low speeds, maintaining overall braking performance while extending the life of aircraft brakes.
Implementation Method 1
Each brake comprises at least one friction member, made for example of steel or carbon, and one or more braking actuators
Data Source
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AI summary
Method for braking at least one wheel of an aircraft, the wheel being provided with a brake having at least one braking actuator, comprising the steps of: - generating a braking command (Com) on the basis of a braking setpoint (Cf); - estimating a speed of the wheel; - applying a dynamic correction to the braking command, the dynamic correction being a function of the braking command and of the speed of the wheel (V(t)), the dynamic correction comprising the step of producing a corrected braking command (Ccorr) which is greater than the braking command when the speed of the wheel is greater than or equal to a predetermined speed threshold, and then the step of reducing the corrected braking command when the speed of the wheel becomes less than the predetermined speed threshold, with the result that the corrected braking command becomes less than the braking command.