Aircraft Neural Network Training With Probability-Filtered Failure Modes
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Solution Overview
Problem
Training a neural network for an aircraft system is computationally intensive and time-consuming due to the large number of operational modes, making it infeasible to achieve the required accuracy and safety standards within a practical timeframe.
Innovation Solution
A method to train a neural network by generating a reduced operational mode data space using probability thresholds to filter out statistically unlikely modes, followed by stratified training and testing data sets to ensure the network can handle a wide range of operational modes, including those more likely to occur in real-world scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the neural network is trained using the complete operational mode data space, then the neural network can handle a wider range of operational modes, but the training becomes computationally intensive and impractical
Solution Approach 1:
The patent extracts only the most relevant operational modes from the complete data space by filtering based on probability thresholds. The filtering process removes operational modes with extremely low probabilities (below theoretical threshold) and separates high-probability modes (above real-world threshold) into a different dataset, keeping only the intermediate probability modes for training. This extraction approach maintains the neural network's ability to handle diverse operational modes while significantly reducing the computational burden of training.
2Power
If the operational mode data space is reduced by filtering out unlikely modes, then the training becomes computationally manageable, but the neural network may not be equipped to deal with unlikely operational modes
Solution Approach 1:
The patent applies local quality by creating different training datasets with different probability characteristics. The training operational mode data space specifically targets intermediate probability modes that represent edge cases and unusual scenarios. Meanwhile, operational modes above the real-world threshold are handled separately, ensuring that both common and unlikely scenarios are covered. This localized approach to data selection ensures that the neural network is specifically trained on the types of operational modes that are computationally feasible to include while maintaining reliability.
3Ease of manufacture
If operational modes are randomly selected from the complete data space, then the training dataset is easier to generate, but the coverage of operational modes may be insufficient
Solution Approach 1:
The patent applies preliminary action by pre-filtering and stratifying the operational mode data space before training. Instead of randomly selecting modes after the fact, the system first categorizes all operational modes by their probability characteristics, identifying which modes fall into the intermediate probability range. This preliminary organization ensures that the training dataset has optimal coverage of operational modes before training begins, eliminating the need for random selection and post-training validation adjustments.
Data Source
AI summary
A method of training a neural network to control an aircraft system. The method includes obtaining an operational mode data space representing a set of operational modes for the aircraft system, wherein each operational mode represents a configuration of the aircraft system where performance of an aircraft component is impaired according to an aircraft system model. Each operational mode includes probability data indicating a respective probability of the operational mode occurring, according to the model. The method includes generating a reduced operational mode data space including operational modes having a probability greater than a theoretical operational probability threshold, and generating a training operational mode data space including operational modes within the reduced operational mode data space that have a probability less than a real-world operational probability threshold. The method includes training the neural network using operational modes within the training operational mode data space.


