Autonomous Vehicle Lateral Dynamics Screening for Safe Lane Guidance
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Solution Overview
Problem
Existing self-driving vehicles face challenges in maintaining safe lane guidance due to faulty lateral dynamics requests, which can cause deviations from predetermined routes, and existing systems lack efficient methods to detect and respond to such errors before they lead to significant deviations.
Innovation Solution
A method and control system that includes defining and filtering lateral dynamics requirements, checking them against predefined criteria, and issuing a braking command if they exceed safety limits, ensuring the vehicle remains within a safe operating state by preventing deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the vehicle follows a predetermined route with automatic navigation, then the vehicle can operate autonomously along a defined path, but the vehicle may deviate from the route due to faulty lateral dynamics requests
Solution Approach 1:
The patent applies preliminary action by checking lateral dynamics requirements against safety criteria before they are executed. The control system evaluates whether requested lateral movements (steering angles, yaw rates, lateral accelerations) meet safety criteria in advance, preventing faulty commands from causing route deviations. This proactive verification ensures autonomous operation reliability by catching potential errors before they affect vehicle positioning.
2Adaptability or versatility
If the system allows lateral dynamics requests from navigation, then the vehicle can adjust its path, but faulty requests can cause excessive steering corrections and unsafe operations
Solution Approach 1:
The patent implements feedback by continuously monitoring lateral dynamics requirements and comparing them against predefined safety criteria. The control system receives lateral dynamics requests from the navigation system, evaluates them against safety thresholds (steering angle limits, yaw rate limits, lateral acceleration limits), and either approves or rejects them based on the evaluation. This closed-loop feedback mechanism allows path adjustment capability while preventing harmful excessive steering corrections by blocking unsafe commands.
3Reliability
If the system detects faulty lateral dynamics requests early, then safe operating state can be maintained, but the system complexity increases due to additional checking mechanisms
Solution Approach 1:
The patent applies segmentation by dividing the control system into distinct functional modules: a navigation system that generates lateral dynamics requirements, a control system that evaluates these requirements against safety criteria, and execution components (steering, braking). This modular segmentation allows the safety checking mechanism to be added as a separate evaluation layer without fundamentally redesigning the entire vehicle control architecture, thus managing complexity while maintaining reliability.
Data Source
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AI summary
A method for operating a self-driving vehicle, comprising the steps of: defining (S1) a lateral dynamics requirement for controlling the lateral dynamics of the self-driving vehicle along a route, communicating (S2) the lateral dynamics requirement to a steering control device for controlling the steering kinematics of the self-driving vehicle, checking (S3) whether the communicated lateral dynamics requirement fulfills a lateral dynamics criterion for the operation of the self-driving vehicle, and communicating (S4) a braking command to stop the self-driving vehicle depending on a test result (P) resulting from the checking step (S3). Furthermore, a control system for operating a self-driving vehicle.