Aircraft Fuel Metering Unit Current Response Detection
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Solution Overview
Problem
Current on-board fuel-regulation devices in aircraft require manual modification of protection application software when replacing fuel metering units, which is inefficient and risky due to different hardware configurations and potential malfunctions.
Innovation Solution
A method to automatically detect the hardware configuration of on-board devices by analyzing the response current to a setpoint current, allowing for adaptive control current adjustment without human intervention, enabling the protection calculator to identify and adapt to different FMU models during startup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual modification of protection application software is performed when replacing fuel metering units, then the control current can be adapted to specific hardware configurations, but the process becomes inefficient and risky due to human intervention requirements
Solution Approach 1:
The protection calculator automatically detects the hardware configuration of the fuel metering unit by analyzing its response to test currents, and self-adapts the control current parameters without requiring manual software modification. This eliminates human intervention while maintaining accurate adaptation, thereby improving both reliability and productivity
Solution Approach 2:
The system automatically changes electrical parameters (control current amplitude, pulse duration) based on the detected hardware configuration of the fuel metering unit. By dynamically adjusting these parameters according to the detected model, the system achieves accurate adaptation without manual software modification
2Reliability
If different control currents are used for different FMU models, then the protection function is optimized for each hardware configuration, but the system complexity increases due to multiple configuration options
Solution Approach 1:
The protection calculator automatically detects the FMU model through electrical characteristic analysis and self-configures the appropriate control current parameters. This eliminates the need for manual configuration management while maintaining optimized protection functions for each hardware model
Solution Approach 2:
The protection calculator is designed with universal adaptability to work with multiple FMU models (different inductance values). By implementing automatic detection and adaptation capabilities, a single device can serve multiple hardware configurations without requiring separate configuration procedures for each model
3Productivity
If automatic detection of hardware configuration is implemented, then the device replacement process becomes efficient and risk-free, but the system requires additional detection mechanisms and processing steps
Solution Approach 1:
The protection calculator performs dual functions: it both detects the hardware configuration through electrical characteristic analysis and provides protection supervision. By combining detection and protection functions in a single device, the system achieves automatic adaptation without adding separate detection hardware, thereby improving productivity while minimizing additional complexity
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
Ensures the control of devices with heterogeneous hardware configurations while providing protection against unexpected turbomachine malfunctions, allowing for seamless replacement of fuel metering units during maintenance without risking unsuitable control currents.
Implementation Method 1
Measure one or more values of the response current I at the output of the device in a measurement-time interval defined between two instants t1 and t2 after the initial instant t0
Data Source
AI summary
The invention relates to a method for detecting a hardware configuration of an on-board device in an aircraft, capable of receiving as input a setpoint current (Ic), and of producing as output a response current (I), the method comprising the following steps:a) Send, to the input of the device, a setpoint current (Ic) at a given time (t0);b) Measure one or more values of the response current (I) at the output of the device in a measurement-time interval defined between two instants (t1 and t2) after the initial instant (t0);c) Infer the hardware configuration of the device, doing so from one or more values of the response current (I) measured.