Aircraft Trajectory Generation Using Dissimilar Database Comparison
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Solution Overview
Problem
Existing trajectory generation systems for aircraft require high hardware and software resources to achieve a high level of integrity, making them complex and prone to errors that can compromise safety.
Innovation Solution
A method and system for generating trajectory elements using two dissimilar databases with initial integrity levels, comparing data items from these databases to achieve a target integrity level greater than the initial, thereby reducing resource requirements while maintaining safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single database with high integrity level is used for trajectory generation, then the integrity of the trajectory element is improved, but the hardware and software resource requirements increase significantly
Solution Approach 1:
The single high-integrity database is segmented into multiple databases with lower individual integrity levels. The trajectory generation system divides the data storage function across several databases, each presenting an initial integrity level, rather than relying on one centralized high-integrity database. This segmentation reduces the resource burden on each individual database while maintaining overall system integrity through redundancy.
Solution Approach 2:
Multiple databases with lower individual integrity levels are combined through a comparison mechanism to achieve the target high integrity level. The system merges data from multiple sources and uses comparison functions to validate consistency, thereby achieving high integrity output without requiring each input database to individually possess high integrity characteristics.
2Reliability
If a monitoring unit with high integrity level is implemented to validate generated data, then the safety and reliability are improved, but the system complexity increases
Solution Approach 1:
The system performs self-validation through comparison functions that automatically detect inconsistencies between data from multiple databases. Rather than implementing a separate complex monitoring unit, the trajectory generation system itself carries out integrity verification by comparing incoming data streams, enabling the system to monitor and validate its own output without additional dedicated monitoring hardware.
3Reliability
If redundant data validation mechanisms are implemented to achieve high integrity, then the reliability is improved, but the processing time and computational resources increase
Solution Approach 1:
The system applies comparison functions selectively rather than performing exhaustive validation on all data. By using partial action - comparing only critical trajectory parameters and using intelligent comparison strategies - the system achieves sufficient integrity verification without the time penalty of complete redundant validation of all data elements.
Data Source
AI summary
A method for generating at least one trajectory element (T) for controlling an aircraft (1) according to the trajectory element (T), the generation method being at least partially implemented by a generation system (2) on board the aircraft (1), and comprising the steps of:receiving a first initial data stored in a first database (6), the first database (6) presenting a first predefined level of integrity, called the initial level of integrity;receiving a second initial data stored in a second database (8), the second database (8) presenting said initial level of integrity, the first database (6) being dissimilar relative to the second database (8);comparing at least one first trajectory data (D1) with at least one second trajectory data (D2);obtaining the trajectory element (T).