Triplex Guidance System for RNP AR Breakdown Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current aircraft systems are unable to maintain the required navigation performance (RNP AR) of 0.1 NM without special authorization and crew training, as they lack the capability to automatically detect and manage breakdowns, relying heavily on human intervention for maintaining safety standards.
Innovation Solution
A guidance system with a triplex architecture comprising multiple pieces of equipment for each stage of aircraft navigation, monitoring, and guidance, which automatically detects and isolates breakdowns, determining a global status to assess the aircraft's ability to perform RNP AR operations, thereby reducing the reliance on human crew intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current aircraft systems are used with usual monitoring functions, then the system complexity remains manageable, but the reliability and safety level cannot reach the target of 10^-7 per procedure for RNP AR operations
Solution Approach 1:
The monitoring function is segmented into multiple independent monitoring units, each responsible for monitoring specific parameters (position accuracy, path deviation, guidance performance). This segmentation allows the system to achieve high reliability through redundancy while keeping each individual monitoring unit relatively simple and manageable.
Solution Approach 2:
The system implements beforehand cushioning by providing redundant monitoring capabilities and pre-configured response protocols. When a breakdown is detected, the system has pre-prepared mitigation actions ready to be executed, ensuring the safety level is maintained without requiring complex real-time decision-making.
2Manufacturing precision
If manual piloting and crew intervention are relied upon to manage breakdowns, then the equipment complexity can be reduced, but the aircraft cannot ensure RNP values of 0.1 NM upon breakdown as crew cannot meet performance requirements in manual piloting
Solution Approach 1:
The monitoring system implements self-service by automatically detecting breakdowns, isolating defective equipment, and executing pre-configured mitigation actions without requiring crew intervention. This allows the system to maintain RNP values of 0.1 NM upon breakdown automatically, eliminating the need for crew to manually meet unachievable performance requirements.
Solution Approach 2:
The system continuously monitors navigation parameters and provides feedback on system status and performance. When deviations from expected performance are detected, the feedback mechanism triggers automatic breakdown management procedures, ensuring navigation precision is maintained through closed-loop control rather than relying on crew judgment and action.
3Manufacturing precision
If special authorization and extensive crew training are required to perform RNP AR procedures, then the navigation precision can be maintained, but the ease of operation and operational requirements become more stringent
Solution Approach 1:
The aircraft system performs self-monitoring and self-management of breakdowns, eliminating the need for specially trained crews to manually manage complex RNP AR procedures. The system automatically maintains navigation precision through redundant monitoring and automated breakdown response, reducing operational requirements to standard procedures that any qualified crew can execute.
Solution Approach 2:
The system implements preliminary action by pre-configuring breakdown response protocols and pre-positioning redundant monitoring capabilities before flight operations begin. This allows the system to automatically respond to breakdowns without requiring crew training on complex emergency procedures, thereby maintaining navigation precision while simplifying operational requirements.
Data Source
AI summary
The device aids the management of air operations, such as operations under Required Navigation Performance with Authorization Required maneuvers. The device includes a guidance system including a plurality of stages for calculating parameters, each of the stages including an architecture having at least three pieces of equipment, which calculate the parameters and implement monitorings to determine the status of the equipment. The device uses these monitored statuses to determine a global status that indicates if the aircraft is able to carry out the air operations with required performance.