Preventive Safety Control for Autonomous Driving Intent Arbitration
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Solution Overview
Problem
Existing autonomous driving systems face challenges in balancing autonomous driving with preventive safety measures, as constant activation of safety features can hinder travel plans, while insufficient activation can compromise safety.
Innovation Solution
A preventive safety device that determines the intention of the autonomous driving system through driving signals, activating safety features only when necessary, using a first and second operating condition to arbitrate between autonomous driving and safety control, and prioritizing safety when the system has an intention to change its operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the preventive safety function is always activated to intervene in autonomous driving when the same operating condition as that at the time of manual driving by the driver is satisfied, then the preventive safety effect is improved, but the traveling plan for autonomous driving is hindered
Solution Approach 1:
The patent changes the activation parameters of the preventive safety function based on the autonomous driving device's intentions. When the autonomous driving device has no intention to perform vehicle control causing satisfaction of the first operating condition, the function activates at the first (less severe) operating condition. When the autonomous driving device has an intention, the function only activates at the second (more severe) operating condition, thus adjusting the activation threshold dynamically to balance safety and efficiency
Solution Approach 2:
The patent makes the preventive safety function dynamic by continuously monitoring the autonomous driving device's intentions and adjusting its activation behavior accordingly. The system transitions between different activation states (first operating condition vs. second operating condition) based on real-time intention detection, making the safety intervention adaptive rather than static
2Productivity
If the preventive safety function is not activated at all during autonomous driving, then the autonomous driving is smooth, but the preventive safety effect of avoiding danger cannot be sufficiently obtained
Solution Approach 1:
The patent implements a feedback mechanism where the autonomous driving device's intentions are continuously monitored and fed back to the preventive safety device. Based on this feedback, the system determines whether to activate the preventive safety function at the first or second operating condition, ensuring that safety intervention occurs appropriately without unnecessarily disrupting autonomous driving
Data Source
AI summary
A preventive safety device has a preventive safety function. The preventive safety device includes one or more processors that: receive an input of a driving signal from an automatic driving device that performs automatic driving of a vehicle; determine whether the first operating condition is satisfied; determine, based on the driving signal, whether the automatic driving device has an intention to perform vehicle control that causes establishment of the first operating condition, an intention to perform vehicle control that eliminates establishment of the first operating condition, or an intention to stop the preventive safety function; when the automatic driving device does not have any of the intentions, activate the preventive safety function in response to establishment of the first operating condition; and when the automatic driving device has any of the intentions, activate the preventive safety function in response to establishment of the second operating condition.