Vehicle State Inference from Supply Voltage for Brake Communication Loss
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Solution Overview
Problem
In electric and internal combustion engine vehicles, the reliance on electrical communication for brake and power steering systems poses challenges during transient conditions, where normal electrical communication may be interrupted, leading to potential component control issues.
Innovation Solution
A vehicle control system that includes electromechanical brake modules, a speed sensor, and a communication monitoring module to determine the communication state of these modules, using vehicle voltage changes to trigger state inference operations and manage power distribution effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electrical component control is used in brake and power steering systems, then weight and complexity are reduced, but reliability deteriorates during transient conditions when electrical communication is interrupted
Solution Approach 1:
The system performs preliminary actions by continuously monitoring communication states and inferring vehicle status before actual control failures occur. The communication monitoring module detects transient conditions early, allowing the system to proactively adjust control strategies and maintain reliability during electrical communication interruptions.
Solution Approach 2:
The system implements feedback mechanisms where the communication monitoring module continuously provides information about communication states to the control system. This feedback loop enables real-time adjustments to control strategies based on detected transient conditions, ensuring reliable component control even when electrical communication is interrupted.
2Reliability
If state inference operations are continuously performed, then component control reliability is improved, but energy consumption increases
Solution Approach 1:
Instead of continuous state inference operations, the system employs periodic monitoring triggered by specific events. The communication monitoring module detects transient conditions and triggers state inference operations only when necessary, reducing energy consumption while maintaining component control reliability during critical transient periods.
Solution Approach 2:
The system uses self-service by leveraging existing communication infrastructure and voltage monitoring capabilities already present in the vehicle. The communication monitoring module utilizes existing electrical signals to detect transient conditions, eliminating the need for additional dedicated sensors or continuous power-intensive monitoring systems.
Data Source
AI summary
In a method of inferring a vehicle state for control of a vehicle component based on the vehicle state inference, the vehicle may include a first electromechanical brake module operably coupled to first wheel-end brakes of a first wheel and a second electromechanical brake module operably coupled to second wheel-end brakes of a second wheel. The method may include receiving an indication of vehicle speed, receiving an indication of vehicle voltage supply to determine whether an event trigger transition is detected based on a change in the vehicle voltage supply, determining a communication state of at least one of the first and second electromechanical brake modules responsive to the event trigger transition being detected, where the communication state is one of a connected state or a disconnected state, and initiating a state inference operation based on the indication of vehicle speed and detection of the event trigger transition.