AI Sensor Degradation Detection for Propulsion Control
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Solution Overview
Problem
Automotive sensors and actuators degrade over time, leading to delayed signal responses and inefficient control system reactions, which can result in suboptimal emissions performance and lack of operational margin for sensors or actuators before failure, without current systems providing effective mitigation for degradation.
Innovation Solution
A method utilizing an artificial intelligence pattern recognition program to analyze signal data from vehicle systems, identify deviations from nominal patterns, and generate corrective data to adjust operational parameters, allowing continued operation within acceptable degraded ranges, and triggering alerts when thresholds are exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control system uses nominal performance expectations for sensors and actuators, then the system can be tuned for optimal performance initially, but the system cannot accommodate degraded sensors or actuators and provides no operational margin before failure
Solution Approach 1:
The control system dynamically adapts to degraded sensor or actuator performance by continuously monitoring actual performance characteristics and adjusting control parameters in real-time. This allows the system to maintain optimal operation even when components degrade, providing operational margin and extending component life without requiring replacement until actual failure occurs.
Solution Approach 2:
The system implements feedback mechanisms that monitor sensor and actuator performance characteristics and use this information to adjust control strategies. By feeding back actual performance data, the system can compensate for degradation and maintain reliable operation, directly addressing the need for operational margin and adaptability to degraded components.
2Reliability
If the oxygen sensor response time is slow due to degradation, then the sensor continues to operate, but the control system over-compensates and under-compensates leading to degraded emissions performance
Solution Approach 1:
The control system changes operational parameters based on detected sensor degradation characteristics. When slow response time is detected, the system adjusts control parameters such as fuel injection timing and duration to compensate for the delayed sensor feedback, thereby maintaining emissions performance despite the degraded sensor continuing to operate.
Solution Approach 2:
The system takes preliminary action by detecting degradation trends before complete failure occurs and proactively adjusts control strategies to prevent emissions deterioration. This allows the system to maintain optimal emissions performance in advance of actual sensor failure, extending operational life while preventing harmful effects.
3Ease of operation
If the control system reacts to sensor degradation as if the sensor is operating properly, then the system maintains its original control logic, but the system provides no margin for degrading sensors and cannot provide continued operation in degraded condition
Solution Approach 1:
The control system performs self-diagnosis and self-adjustment by monitoring its own sensor and actuator performance characteristics. When degradation is detected, the system automatically modifies its control logic to accommodate the degraded components, maintaining reliable operation without requiring external intervention or complex manual reconfiguration.
Data Source
AI summary
A method to detect and mitigate sensor or actuator degradation in an automobile system includes: collecting a signal data output from at least one device which is outputting the signal data in response to monitored operational parameters of a motor vehicle system; analyzing patterns of the signal data compared to a signal data output from a nominal operating one of the at least one device using an artificial intelligence program; and identifying when the patterns of the signal data exceed a threshold level indicating the at least one sensor or actuator is operating in a degraded condition.