Adaptive Brake Control Map Updating for Worn Brake Performance
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Solution Overview
Problem
Existing vehicle braking control technologies fail to effectively manage braking performance when it deteriorates, such as due to worn-out brake pads, especially during emergency braking scenarios which occur less frequently.
Innovation Solution
A driving support system that includes a braking controller, calculators for determining braking control amounts based on set standards, and an updater that adjusts these standards based on the relative comparison between estimated and actual braking behaviors, allowing for adaptive control even when braking performance is decreased.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If emergency braking control is executed only in emergencies, then the braking system operates normally under standard conditions, but the system cannot detect or compensate for braking performance deterioration
Solution Approach 1:
The system performs preliminary actions by executing braking control at a lower execution frequency even under standard conditions (not just in emergencies). This allows the system to proactively detect braking performance deterioration before it becomes critical, by comparing actual braking behavior with estimated braking behavior in advance.
Solution Approach 2:
The system implements feedback by comparing the actual braking behavior with the estimated braking behavior, and updating the setting standard (braking map) based on the relative relationship between them. This feedback mechanism enables continuous monitoring and adaptation to detect performance deterioration.
2Reliability
If braking control is executed frequently to monitor performance, then braking performance can be maintained, but system complexity and computational load increase
Solution Approach 1:
The system applies partial action by executing braking control at a lower execution frequency (not full emergency frequency) under standard conditions. This partial monitoring is sufficient to detect performance deterioration trends without requiring continuous full-scale emergency braking tests, thus reducing system complexity while maintaining reliability.
Data Source
AI summary
A driving support device includes a braking controller configured to execute braking control, a first calculator configured to calculate a first braking control amount of the braking controller, a second calculator configured to calculate, on the basis of a setting standard, a second braking control amount of the braking control executed at an execution frequency lower than an execution frequency of the braking control based on the first braking control amount, and an updater configured to update the setting standard on the basis of a relative relationship between an estimated braking behavior based on the first braking control amount and an actual braking behavior based on the first braking control amount.