Aircraft Fire Suppression with Concentration Feedback Control
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Solution Overview
Problem
Conventional aircraft fire suppression systems add weight to the aircraft, increasing fuel costs and environmental impact due to inefficiencies in fire suppressant usage and distribution.
Innovation Solution
A fire suppression system with sensors and a controller that regulate the flow of fire suppressant to maintain a target concentration within the compartment, optimizing suppressant usage and reducing the number and size of tanks needed, thereby minimizing weight and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fire suppression systems are used, then fire safety is ensured, but aircraft weight increases and fuel costs rise
Solution Approach 1:
The system employs concentration sensors to continuously monitor fire suppressant levels and feeds this information back to the controller, which automatically adjusts valve positioning to maintain optimal concentration. This closed-loop feedback eliminates the need for oversized tanks and suppressant reserves, reducing weight while ensuring adequate fire suppression capability.
Solution Approach 2:
The system transitions from static, pre-programmed discharge patterns to dynamic, real-time control. The controller continuously adjusts the discharge rate based on actual compartment concentration measurements, allowing the system to adapt to varying fire conditions and suppressant consumption rates, thereby optimizing suppressant usage and reducing required system capacity.
2Reliability
If conventional fire suppression systems are used, then fire suppression capability is provided, but system complexity and weight increase
Solution Approach 1:
By implementing concentration sensing and automated feedback control, the system replaces complex mechanical flow regulation mechanisms with simpler electronic control. The controller automatically manages suppressant discharge based on sensor input, reducing the need for multiple manual controls, complex metering devices, and oversized storage tanks.
Solution Approach 2:
The system replaces traditional mechanical flow control mechanisms with electronic control systems. Instead of relying on complex mechanical metering devices and manual regulation, the system uses electronic sensors and a controller to precisely regulate suppressant discharge, simplifying the overall system architecture while maintaining or improving control precision.
3Reliability
If conventional fire suppression systems are used, then adequate fire suppressant delivery is ensured, but suppressant usage efficiency decreases
Solution Approach 1:
The concentration sensors provide real-time feedback on suppressant concentration within the compartment, allowing the controller to precisely regulate discharge rate. This feedback mechanism prevents both insufficient and excessive suppressant delivery, optimizing usage efficiency while ensuring adequate fire suppression capability throughout the fire emergency duration.
Solution Approach 2:
The system dynamically changes the discharge rate parameter based on actual compartment conditions and suppressant consumption. By continuously monitoring concentration and adjusting the discharge rate accordingly, the system optimizes suppressant usage efficiency, preventing waste while ensuring sufficient suppressant is delivered to maintain effective fire suppression.
Data Source
AI summary
An aircraft comprises a fuselage having a compartment, and a fire suppression system for delivering fire suppressant to the compartment. The system includes at least one suppressant concentration sensor located in the compartment, a valve for regulating flow of the fire suppressant to the compartment, and a controller, responsive to the sensor, for controlling the valve to maintain fire suppressant concentration within the compartment at a target concentration.