Vehicle Control System Dynamic Safety Intervention
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Solution Overview
Problem
During automated driving, the safety criteria for preventive safety control do not align with those of the automated driving system, leading to excessive intervention and discomfort or anxiety for passengers and surrounding people.
Innovation Solution
A vehicle control system that includes a first unit for generating a target trajectory and a second unit for executing vehicle travel control, where the second unit's controller adjusts the intervention degree of preventive safety control based on automated driving information, including the target trajectory, reliability, failure degree, and risk information, to optimize safety without unnecessary intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If preventive safety control is executed with fixed intervention degree, then collision prevention is improved, but unnecessary intervention causing discomfort and anxiety increases
Solution Approach 1:
The intervention degree of preventive safety control is made dynamic by adjusting it according to the automated driving information from the first unit. The controller changes the intervention degree based on target trajectory, reliability, failure degree, and risk information, allowing the system to adapt to different driving situations rather than using a fixed intervention level.
Solution Approach 2:
The system changes the parameter of intervention degree based on multiple factors including target trajectory, reliability of the automated driving system, failure degree, and risk information. This parameter adjustment allows the preventive safety control to be optimized for each specific situation, reducing unnecessary interventions while maintaining collision prevention.
2Reliability
If safety criteria for preventive safety control are made independent from automated driving system criteria, then collision prevention is improved, but excessive intervention occurs
Solution Approach 1:
The system merges the safety criteria of preventive safety control with the automated driving system criteria by having the controller adjust intervention degree based on automated driving information. This integration allows both systems to work together harmoniously rather than independently, reducing excessive intervention while maintaining collision prevention.
Solution Approach 2:
The controller receives automated driving information as feedback from the first unit and uses this feedback to adjust the intervention degree of preventive safety control. This feedback mechanism enables the system to coordinate between different safety criteria dynamically, preventing excessive intervention while maintaining high safety standards.
Data Source
AI summary
A vehicle control system includes a first unit configured to generate a target trajectory based on a travel plan of the vehicle, and a second unit configured to execute vehicle travel control such that the vehicle follows the target trajectory. During the automated driving, the first unit transmits automated driving information to the second unit. The system includes a memory device in which driving environment information is stored, and a processor for controlling a travel control amount. During the automated driving, the processor executes preventive safety control for intervening in the travel control amount so as to prevent or avoid a collision between the vehicle and an obstacle based on the driving environment information. In the preventive safety control, the processor changes an intervention degree to the travel control amount based on the automated driving information.