Automated Vehicle Trajectory Selection for Safe Transfer
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Solution Overview
Problem
Partly or highly automated vehicles face challenges in safely transitioning to a secure state due to system errors, with existing methods not adequately addressing the selection of optimal trajectories based on safety criteria, potentially leading to hazards for occupants and other traffic participants.
Innovation Solution
A method that determines the need for a safe system state by assessing vehicle and driver states, calculates and rates travel trajectories based on safety-relevant criteria, including localization accuracy and environmental sensor functionality, to select the safest trajectory for transferring the vehicle to a target site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple trajectories are calculated to a target site, then the probability of finding a safe trajectory increases, but the computational complexity and time required for trajectory selection increases
Solution Approach 1:
The patent segments the trajectory evaluation process into distinct rating criteria (safety, comfort, energy consumption, time). Each trajectory is evaluated independently across multiple dimensions, allowing complex multi-criteria optimization to be broken down into manageable separate assessments that can be processed efficiently
Solution Approach 2:
The patent transforms the complex safety assessment into quantifiable rating parameters that can be systematically compared. By converting qualitative safety considerations into measurable rating values across multiple criteria, the system enables efficient computational comparison of multiple trajectories without requiring exhaustive analysis of each option
2Reliability
If trajectory rating is based on multiple safety-relevant criteria including localization accuracy and sensor functionality, then the safety assessment becomes more comprehensive, but the computational effort and data processing requirements increase
Solution Approach 1:
The comprehensive safety assessment is segmented into distinct rating criteria (localization accuracy, sensor functionality, trajectory safety, comfort, energy consumption). Each criterion is evaluated independently using specific data from relevant sensors and systems, allowing the computational workload to be distributed across multiple specialized assessment modules rather than requiring one monolithic complex calculation
Solution Approach 2:
The system performs preliminary assessments of localization accuracy and sensor functionality before conducting the full trajectory rating. By pre-evaluating the quality of input data from sensors and localization systems, the patent avoids performing unnecessary complex calculations when data quality is insufficient, thereby reducing overall computational effort while maintaining comprehensive safety assessment where needed
3Reliability
If the vehicle transfers to a safe system state at a target site, then the safety of occupants and traffic participants is enhanced, but the time required to reach the target site and execute the transfer increases
Solution Approach 1:
The patent transforms the safety assessment into a multi-parameter rating system that quantifies both safety benefits and time costs. By assigning rating values to different trajectories based on multiple criteria including time, the system enables direct comparison of safety improvements against time losses, allowing optimization of the safety-time tradeoff rather than treating safety as a binary outcome
Solution Approach 2:
The trajectory selection is performed dynamically based on current vehicle state, environmental conditions, and real-time sensor data. The rating criteria and their weights can be adjusted based on the specific situation, allowing the system to adaptively balance safety requirements against time constraints rather than following a fixed rigid protocol
Data Source
AI summary
A method for generating a signal for transferring a partly or highly automated vehicle into a safe system state at a target site. First, a need to transfer the vehicle into a safe system state is ascertained. A vehicle state is then determined, the vehicle state encompassing the current vehicle position. At least one target site is ascertained. Travel trajectories are ascertained from the current vehicle position to the at least one target site. The travel trajectories are related. One of the travel trajectories is selected based on the rating that has been carried out. A signal is generated on the basis of the selected travel trajectory.