Aircraft High-Lift Failure Detection via Temporary Spoiler Deployment
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Solution Overview
Problem
Existing methods for detecting failures in high lift systems of aircraft are complex and require significant effort, especially when dealing with varying loads due to different aircraft sizes and weights, and often result in false alarms or fail to distinguish normal fluctuations from actual malfunctions.
Innovation Solution
Temporarily deploying spoiler surfaces to artificially increase air loads on high lift devices, allowing for improved detection and monitoring of failures by measuring load, displacement, or position changes, which can be amplified during flight phases like cruise or landing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional monitoring methods are used, then the system can operate with standard equipment, but the detection reliability is reduced due to inability to distinguish normal fluctuations from actual failures
Solution Approach 1:
The method performs a preliminary test operation by temporarily deploying the spoiler surface before normal operation to establish a baseline load signature. This preliminary action allows the system to learn normal fluctuation patterns in advance, enabling more reliable distinction between normal variations and actual failures during subsequent monitoring.
Solution Approach 2:
The monitoring system performs periodic test operations at predetermined intervals by temporarily deploying the spoiler surface. This periodic action refreshes the baseline load signature and allows continuous verification of system integrity without requiring constant monitoring, balancing detection reliability with operational efficiency.
2Reliability
If tolerances are set to reliably detect malfunctions, then failure detection improves, but false alarms increase due to normal position fluctuations
Solution Approach 1:
The system uses feedback from the load sensor measurements during temporary spoiler deployment to continuously update the baseline load signature. This feedback mechanism allows the system to adapt to changing operating conditions and aircraft characteristics, adjusting the reference against which failures are detected, thereby reducing false alarms while maintaining reliable failure detection.
Solution Approach 2:
The method changes the operational parameter by temporarily deploying the spoiler surface to create a distinct load state that is different from normal operation. This parameter change allows the system to measure the load signature under controlled conditions, establishing a reliable baseline that accounts for normal position fluctuations and reduces false alarm rates.
3Measurement precision
If multiple sensors are installed to improve monitoring coverage, then detection capability increases, but device complexity and cost increase
Solution Approach 1:
The load sensor serves multiple functions: it measures aerodynamic loads on the high-lift surface, establishes baseline signatures during test operations, detects deviations indicating failures, and adapts to changing operating conditions. This multi-functionality allows comprehensive monitoring coverage using a single sensor, avoiding the complexity and cost of multiple specialized sensors.
Solution Approach 2:
The system uses the aircraft's existing aerodynamic environment and the load sensor's inherent capabilities to perform self-diagnosis. By temporarily deploying the spoiler surface and measuring the resulting load changes, the system automatically establishes its own baseline and detects anomalies without requiring external testing equipment or complex additional sensor arrays.
4Measurement precision
If physical modifications are made to the aircraft structure to improve detection, then measurement accuracy improves, but manufacturing complexity and cost increase
Solution Approach 1:
The method replaces complex mechanical measurement systems with an aerodynamic-based detection approach. Instead of installing mechanical position sensors or strain gauges on the high-lift surfaces, the system uses the natural aerodynamic loads generated during temporary spoiler deployment to infer system integrity, thereby maintaining manufacturing simplicity while achieving high detection accuracy.
Solution Approach 2:
The spoiler surface acts as an intermediary tool that temporarily modifies the aerodynamic environment to enable detection. By deploying the spoiler, the system creates a controlled load condition that reveals system integrity information without requiring permanent modifications to the aircraft structure or high-lift surfaces, maintaining ease of manufacture while improving detection accuracy.
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
Enhances the reliability and flexibility of failure detection in high lift systems, reducing the need for physical modifications and minimizing false alarms while providing more accurate monitoring of system integrity.
Implementation Method 1
temporarily deploying at least one spoiler surface; performing a detection or measurement at least while the spoiler surface is temporarily being deployed
Data Source
AI summary
A method of detecting a failure in and or monitoring integrity of a high lift system of an aircraft includes temporarily deploying at least one spoiler surface, performing a detection or measurement at least while the spoiler surface is temporarily being deployed, and based on the detection or measurement, evaluating presence or absence of a failure of the high lift system and or evaluating the integrity of the high lift system.