Goal-Aware RSS Safety Rules for Complex Driving Scenarios
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional responsibility-sensitive safety (RSS) techniques are limited to simple scenarios and cannot effectively handle complex driving scenarios, such as those involving lane changes and emergency stops, where multiple subgoals and safety conditions must be satisfied.
Innovation Solution
The goal-aware RSS divides complex scenarios into subscenarios, using a program logic system to derive safety rules that ensure both safety conditions and postconditions are met by identifying control strategies and preconditions for each subscenario, employing a differential Hoare logic to verify these conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional responsibility-sensitive safety (RSS) is used, then simple collision avoidance scenarios can be handled, but complex driving scenarios involving multiple subgoals cannot be coped with
Solution Approach 1:
The patent applies segmentation by dividing a complex driving scenario into multiple subscenarios, each with its own control strategy and goal. This allows the system to handle complex scenarios by breaking them down into manageable segments that can be processed individually while maintaining overall safety and goal achievement.
2Reliability
If safety rules are formulated for complex scenarios with multiple subgoals, then both safety and goal achievement can be ensured, but the formulation process becomes more complex
Solution Approach 1:
The patent segments the safety rule formulation process into subscenarios, where each subscenario has its own preconditions and control strategies. This segmentation makes the formulation process more manageable while ensuring comprehensive safety coverage across all subgoals.
Solution Approach 2:
The patent applies preliminary action by calculating preconditions for each subscenario before executing control strategies. This ensures that all necessary conditions are verified in advance, guaranteeing safety and goal achievement while systematically managing the complexity of the formulation process.
3Device complexity
If conventional RSS is used, then the system structure remains simple, but it cannot ensure both safety conditions and postconditions in complex scenarios
Solution Approach 1:
The patent segments the autonomous driving system into multiple subscenarios, each with dedicated control strategies and preconditions. This segmentation enables the system to guarantee both safety conditions and postconditions in complex scenarios while maintaining a structured and manageable system architecture.
Solution Approach 2:
The patent implements preliminary action by calculating and verifying preconditions for each subscenario before control strategy execution. This ensures that both safety conditions and postconditions are guaranteed to be met, enhancing system reliability without excessive complexity.
Data Source
AI summary
A safety rule capable of coping with a complex scenario is formulated. A safety rule generation device includes an input unit configured to receive an input of scenario information representing a predetermined scenario by chaining subscenarios in which a control strategy and a goal are associated, a precondition calculation unit configured to calculate a precondition for executing the control strategy while achieving the goal for each of the subscenarios, and an output unit configured to output safety rule information obtained by combining the precondition and the control strategy for each of the subscenarios.