Aircraft Cabin Feed Air Control Using Distributed Temperature Sensing
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Solution Overview
Problem
Existing cabin temperature regulation systems in passenger aircraft often fail to maintain a consistent and pleasant ambient temperature across all zones, leading to discomfort for passengers due to localized temperature fluctuations and inadequate representation of average cabin temperature by single sensors.
Innovation Solution
A method utilizing multiple temperature sensors distributed throughout the cabin to gather individual temperature values, which are then averaged or calculated to deduce a representative ambient temperature measurement, compared to a reference value, and used to regulate the feed air temperature, thereby reducing the impact of localized fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single temperature sensor is used in each cabin zone, then the device complexity is reduced, but the measurement precision and reliability of ambient temperature regulation deteriorates due to localized fluctuations and inability to represent average cabin temperature
Solution Approach 1:
The cabin zone is divided into multiple measurement points with individual temperature sensors distributed throughout the zone. Each sensor measures temperature at its specific location, and these segmented measurements are combined to form a comprehensive representation of the overall cabin temperature, resolving the issue of single-point measurement inadequacy
Solution Approach 2:
Multiple individual temperature measurements from different locations within the cabin zone are merged through arithmetic averaging to produce a single representative ambient temperature value. This combining approach eliminates localized fluctuations and provides a reliable average temperature for regulation purposes
2Reliability
If multiple temperature sensors are distributed throughout the cabin, then the measurement precision and reliability of ambient temperature regulation improves, but the device complexity increases
Solution Approach 1:
The temperature monitoring function is segmented across multiple sensors distributed in the cabin zone, with each sensor independently measuring local temperature. This segmentation improves reliability by capturing temperature variations at different locations while the electronic control unit integrates these measurements
Solution Approach 2:
The electronic control unit continuously receives temperature signals from multiple sensors, calculates the average ambient temperature, compares it with the desired temperature, and adjusts the feed air temperature accordingly. This feedback mechanism ensures reliable temperature regulation despite the increased sensor 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
This approach ensures a more accurate representation of cabin temperature, reducing temperature-related discomfort and maintaining a consistent, pleasant ambient atmosphere by minimizing the effect of localized interference on feed air temperature.
Implementation Method 1
a temperature sensor system (24) takes a measurement value for ambient temperature in the cabin area
Implementation Method 2
the temperature of the feed air is controlled dependent upon a deviation of the ambient temperature measurement value
Data Source
AI summary
With a method for controlling the temperature of feed air supplied to a cabin area of a passenger aircraft (10), a measurement value for the ambient temperature in the cabin area is determined by means of a temperature sensor system (24). The temperature of the feed air is controlled, dependent upon a deviation of the ambient temperature measurement value in relation to an ambient temperature optimum value. In accordance with the invention, the ambient temperature measurement value is deduced from a number of individual temperature values for different points in the cabin area. In accordance with an example, the temperature sensor system used to establish individual temperature values for a cabin zone includes a number of discreet temperature sensors (24) positioned in this cabin zone, each of which provides an individual temperature value. Preferably, the temperature sensors (24) are distributed evenly over the whole length of the cabin zone in question.