Aircraft Air Parameter Circuit Using Intermediary Selection Logic
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Solution Overview
Problem
Existing systems for determining air parameters around an aircraft are complex due to the need for robust selection logic and engine insulation, leading to intricate designs involving exchange of precision information or comparison results.
Innovation Solution
An electronic circuit that receives and compares data from multiple sources to determine a representative air parameter, allowing for the selection of data with the maximum number of agreements, which is then transmitted to an engine control computer, simplifying the design while maintaining robustness and adhering to engine insulation constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If robust selection logic with considerable number of comparisons among sources is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent introduces intermediary devices (first and second selection devices) positioned between the multiple sources and the engine control computer. These intermediaries perform the complex comparison and selection operations, allowing the main system to maintain simplicity while achieving robustness through the intermediary's processing capabilities.
Solution Approach 2:
The selection function is segmented into separate selection devices, each handling specific comparison tasks. The first selection device compares data from first and second sources, while the second selection device compares data from third and fourth sources. This segmentation distributes the computational burden and simplifies the overall system architecture.
2Measurement precision
If precision information exchange between fuselage sources and engine control is implemented, then measurement precision is improved, but device complexity increases
Solution Approach 1:
Selection devices act as intermediaries that receive data from multiple fuselage sources, perform comparisons to determine precision and reliability, and forward only the selected precise data to the engine control computer. This intermediary processing maintains measurement precision while avoiding the complexity of direct multi-source connections to the engine control.
Solution Approach 2:
The system creates copies of data from multiple sources and routes them through selection devices. Instead of directly exchanging complex precision information between all sources and engine control, the system uses copied data paths through intermediary selection logic, simplifying the information exchange architecture.
3Reliability
If multiple redundant sources are used for measuring air parameters, then reliability is improved, but loss of information increases due to data management complexity
Solution Approach 1:
Selection devices serve as intermediaries that manage the redundant information from multiple sources. They receive data from four different sources (first, second, third, and fourth sources), perform systematic comparisons, and forward the selected reliable data to the engine control computer, preventing information loss through structured management.
Solution Approach 2:
The selection devices implement feedback mechanisms by continuously comparing data from redundant sources and adjusting selections based on agreement levels. When data from multiple sources agree, the system confirms reliability; when discrepancies occur, the feedback loop enables re-evaluation and selection of the most reliable data, preventing information loss.
Data Source
AI summary
An electronic circuit, and a system including such a circuit, for determining a datum representative of a parameter of air surrounding an aircraft, including: a mechanism receiving, from a plurality of sources, a plurality of respective measurement data representative of a measured value of the parameter; a mechanism determining the datum representative of the parameter based on the measurement data; and a mechanism transmitting the datum representative of the parameter to a computer associated with an aircraft engine.