Emergency Locator and Flight Recorder Release Logic for Distress Validation
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Solution Overview
Problem
Existing deployable safety devices like emergency locator transmitters and flight recorders suffer from inadvertent deployments, leading to hazards, airframe damage, and false alarms due to varied sensor failures and manual activations.
Innovation Solution
A multiple input release mechanism that combines aircraft parameters and crash indicators using a distress algorithm, including bank angle, vertical speed, acceleration, and ground proximity, to determine if an aircraft is in distress before deploying the safety device, reducing reliance on single crash sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single crash sensors are used to trigger deployment, then the deployment response is fast and simple, but inadvertent deployments occur due to sensor failures or false activations
Solution Approach 1:
The release mechanism is divided into multiple independent sensor modules, each monitoring different crash parameters (acceleration, velocity, pressure). No single sensor can trigger deployment alone; multiple sensors must simultaneously detect crash conditions, segmenting the triggering function to prevent false activations while maintaining rapid response capability
Solution Approach 2:
Multiple sensor outputs are merged into a unified decision logic that requires concurrent detection of multiple crash parameters before initiating deployment. This combining approach integrates information from various sensors to make a more reliable deployment decision, reducing false positives while preserving fast response times
2Reliability
If multiple sensors and algorithms are used to determine distress, then inadvertent deployments are reduced, but the system complexity and processing requirements increase
Solution Approach 1:
The system dynamically adjusts sensitivity thresholds and decision criteria based on flight conditions and sensor data patterns. The distress determination algorithm adapts its parameters in real-time, allowing the system to maintain high reliability across varying operational conditions without requiring excessive hardware complexity
Solution Approach 2:
A distress determination algorithm acts as an intermediary layer between raw sensor data and deployment activation. This software mediator processes and correlates inputs from multiple sensors, applying logical rules and thresholds to determine genuine distress conditions, thereby reducing false alarms while keeping hardware architecture relatively simple
Data Source
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AI summary
Various systems may benefit from appropriate triggers to action. For example, various deployable safety devices, such as emergency locator transmitters and flight recorders, may benefit from a multiple input release mechanism. A method includes identifying the presence of at least one crash indicator (210), performing an analysis of aircraft distress based on aircraft parameters (220) other than the at least one crash indicator to provide an analysis result of aircraft distress and triggering the release of a safety device contingent (230) upon the presence of the at least one crash indicator being accompanied by a positive result of aircraft distress.