Autonomous Safety Control Actuation Using Kalman-Lyapunov Prediction
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Solution Overview
Problem
Existing control systems require a threshold to be reached before initiating mitigation, leading to delayed responses compared to predictive systems.
Innovation Solution
A system utilizing a sensor, Kalman filter, and Lyapunov function to estimate state and covariance, comparing the time derivative to a reference value for proactive mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a standard threshold trigger is used to initiate mitigation, then the system is simple to operate, but the response time is delayed
Solution Approach 1:
The system performs preliminary action by predicting future threshold violations before they occur. The predictive model estimates future states and triggers mitigation proactively when a violation is anticipated, rather than waiting for the actual threshold breach. This eliminates the time delay inherent in traditional threshold-based systems while maintaining operational simplicity through automated prediction algorithms.
Solution Approach 2:
The system implements continuous feedback by monitoring current system state, comparing it against the predictive model's forecast, and adjusting mitigation timing accordingly. The feedback loop provides real-time information about the likelihood of future threshold violations, enabling the system to initiate mitigation at the optimal moment rather than waiting for a fixed threshold trigger.
2Reliability
If mitigation is initiated only after threshold is reached, then false alarms are reduced, but safety response is delayed
Solution Approach 1:
The system takes preliminary action by predicting future threshold violations before they occur. The predictive model forecasts system behavior and triggers mitigation proactively when a violation is anticipated, ensuring safety response occurs before the actual threshold breach while avoiding false alarms through statistically rigorous prediction confidence levels.
Solution Approach 2:
The system applies preliminary anti-action by preparing and initiating mitigation measures in advance of the actual threshold violation. The predictive model identifies upcoming violations and triggers countermeasures beforehand, preventing the harmful effect from occurring in the first place rather than responding after the fact.
Data Source
AI summary
A system for actuating a safety control for a device including: (1) at least one sensor adapted to measure a parameter of the device and provide an output; (2) a Kalman filter adapted to receive the output of the at least one sensor and provide a state estimate and covariance value of the device; (3) a Lyapunov function adapted to receive the state estimate and covariance value from the Kalman filter and provide a time derivative; and (4) a comparator adapted to compare the time derivative to a reference value and provide a command decision to the device.
