Vehicle Control System with Priority-Based Override Logic
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Solution Overview
Problem
Current automatic driving systems can only select between an automatic driving state and an override state, leading to unfavorable usability.
Innovation Solution
A control system that generates control outputs based on manipulation quantity information, incorporating a manipulation interface unit, automatic control units, safety verification units, and an output control unit to select and prioritize automatic control outputs based on safety confirmation and priority information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only automatic driving state and override state are provided, then safety is ensured through clear state separation, but usability deteriorates due to limited user interaction options
Solution Approach 1:
The control system segments the override operation into multiple levels based on manipulation quantity. When the manipulation quantity exceeds a first threshold, the system enters a first override state with safety verification. When it exceeds a second threshold (higher than the first), the system enters a second override state without safety verification. This segmentation allows users to choose different interaction modes based on urgency, improving usability while maintaining safety options.
2Reliability
If safety verification is always applied, then safety is maximized, but user response time deteriorates in emergency situations
Solution Approach 1:
The system dynamically adjusts the safety verification process based on the manipulation quantity. For small manipulation quantities (first override state), safety verification is performed which may extend response time. For large manipulation quantities (second override state), safety verification is skipped to enable immediate response. This dynamic adjustment optimizes both safety and response time based on the urgency indicated by the user's manipulation strength.
3Ease of operation
If multiple control states are provided, then usability is improved through flexible user interaction, but device complexity increases
Solution Approach 1:
The system uses manipulation quantity (a continuous parameter) as the basis for determining control state transitions. By monitoring changes in this parameter against predefined thresholds, the system achieves multiple functional states without requiring complex state machines or additional hardware switches. This parameter-based control simplifies the overall system architecture while enabling flexible user interaction.
Data Source
AI summary
A control system includes a manipulation interface unit that generates manipulation quantity information and priority information, a plurality of automatic control units that generates automatic control outputs based on predetermined inputs, safety verification units that confirm safety of the automatic control outputs, and an output control unit that outputs a control output according to any one of a predetermined automatic control output and the manipulation quantity information. Based on the priority information, the output control unit selects an automatic control output having the highest selection priority from the automatic control outputs of which the safety is confirmed to generate the control output, generates the control output according to the manipulation quantity information when the safety verification units confirm the safety, or generates the control output according to the manipulation quantity information regardless of the safety confirmation results.