Vehicle Control Logic for Collision Avoidance During EDSS Stop
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Solution Overview
Problem
Existing vehicle control systems fail to properly manage collision avoidance and emergency stop controls when an Emergency Driving Stop System (EDSS) is already in operation, leading to potential collisions and improper vehicle deceleration.
Innovation Solution
A vehicle control apparatus that adjusts the conditions for initiating collision avoidance and emergency stop controls based on whether the EDSS is active, using different thresholds and operation determination conditions to ensure timely and appropriate intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the conventional apparatus permits override and does not perform automatic braking when driver operation is detected, then driver control priority is maintained, but collision avoidance reliability deteriorates when driver operation is erroneous
Solution Approach 1:
The system applies different control strategies based on the local condition of driver state. When the driver is in a normal state, override is permitted to maintain driver control priority. When the driver is in an anomaly state detected by EDSS, override is prohibited and automatic braking is executed to ensure collision avoidance reliability. This local differentiation resolves the contradiction by adapting the control mode to the specific situation.
2Reliability
If the EDSS performs emergency stop control to automatically stop the host vehicle, then driver safety is improved when driver cannot drive properly, but collision avoidance control coordination deteriorates when obstacle collision is predicted
Solution Approach 1:
The system dynamically adjusts the first operation start conditions based on whether EDSS is executing emergency stop control. When EDSS is active, the system switches to a different set of start conditions (second control execution period first operation start conditions) that are specifically designed to coordinate with emergency stop control, rather than using the standard conditions. This dynamic adaptation resolves the coordination complexity by having pre-defined conditional logic for different operational states.
3Reliability
If different first operation start conditions are used based on EDSS execution state, then collision avoidance appropriateness is improved during EDSS operation, but control system complexity increases
Solution Approach 1:
The system performs preliminary classification by determining whether EDSS is executing emergency stop control before initiating collision avoidance operations. Based on this preliminary determination, the system selects the appropriate set of first operation start conditions in advance. This preliminary action approach resolves the contradiction by organizing the complexity into discrete, pre-defined conditional branches rather than requiring continuous complex decision-making.
Data Source
AI summary
A vehicle control apparatus comprises: a first control system that executes a first operation for reducing a possibility of collision between a host vehicle and an obstacle; and a second control system that execute a second control for automatically stopping the host vehicle when a driver of the host vehicle has fallen into an anomaly state where the driver cannot drive the host vehicle properly is obtained. In the apparatus, a second control in-execution period first operation start condition necessary to be satisfied in order for the first system to start executing the first operation while the second control system is not being executed the second control and a second control execution period first operation start condition necessary to be satisfied in order for the first system to start executing the first operation while the second control system is being executing the second control are different from each other.