Stall Margin Indicator Activation Logic for Aircraft
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Solution Overview
Problem
Current aircraft systems display stall margin indicators permanently, which is unnecessary and can overwhelm pilots, as these indicators are meant to provide critical assistance only when the automatic angle-of-attack protection system is inactive, requiring a more targeted and accurate activation method.
Innovation Solution
A method and device that activate the display of stall margin indicators only when the automatic angle-of-attack protection system is inactive, using computation of the aircraft's stall margin, consolidated angle-of-attack, and Mach number, and managing stall prevention devices to ensure accurate and timely piloting assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stall margin indicators are displayed permanently, then pilots have continuous access to stall margin information, but pilot workload increases and information becomes overwhelming
Solution Approach 1:
The stall margin indicator display is made dynamic rather than static. The indicator is automatically activated or deactivated based on the operational state of the automatic angle-of-attack protection system. When the protection system is active, the indicator remains hidden; when it becomes inactive, the indicator activates to provide stall margin information. This dynamic adaptation resolves the contradiction by providing information only when necessary, reducing pilot workload while maintaining safety.
2Ease of operation
If stall margin indicators are displayed only when protection system is inactive, then pilot workload is reduced, but stall margin information may not be available when needed
Solution Approach 1:
The system implements feedback by continuously monitoring the operational state of the automatic angle-of-attack protection system and using this information to control the display state of the stall margin indicator. The feedback loop ensures that the indicator is activated precisely when the protection system becomes inactive, guaranteeing that stall margin information is available exactly when the pilot needs it for manual stall prevention.
3Loss of information
If stall margin indicator is always visible, then pilots can continuously monitor stall margin, but the display becomes cluttered and less accurate information delivery
Solution Approach 1:
The stall margin indicator is extracted from the permanent display and conditionally displayed only when necessary. By removing the indicator from continuous display and activating it only when the protection system is inactive, the solution eliminates display clutter while ensuring that stall margin information remains prominent and accurate when the pilot needs it for manual intervention.
Data Source
AI summary
An activation device comprising a computation unit configured to compute a stall margin of the aircraft, an information reception unit configured to receive information indicating if an automatic angle-of-attack protection system of the aircraft is active or inactive, and an activation unit configured to activate the display of the stall margin indicator only if the automatic angle-of-attack protection system is inactive.