Post-Collision Vehicle Trajectory Control
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Solution Overview
Problem
Current active safety systems are inadequate in preventing or mitigating secondary collisions after an initial collision, as they rely on driver interventions that may not be feasible or effective, especially when the driver is incapacitated or unable to respond appropriately.
Innovation Solution
A safety system that determines a safe target trajectory and position for the vehicle post-collision using environmental data and intelligent control logic, enabling autonomous or assisted driving interventions to avoid further collisions, such as intelligent braking and steering, to ensure optimal positioning and minimize damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driver intervention is used to avoid secondary collisions, then the system complexity remains low, but the reliability decreases when the driver is incapacitated or unable to respond
Solution Approach 1:
The safety system performs autonomous actions without requiring driver intervention. The control device automatically determines target trajectories and executes driving interventions based on sensor data and collision risk assessment, allowing the system to serve itself in avoiding secondary collisions without human input.
Solution Approach 2:
The patent replaces manual driver actions with automated electronic control systems. The control device uses sensor inputs, processing units, and actuator outputs to substitute the mechanical driver-vehicle interaction with an electronic autonomous control loop, thereby maintaining reliability when the driver is incapacitated.
2Reliability
If autonomous driving interventions are implemented to determine target trajectories, then the reliability of avoiding secondary collisions improves, but the device complexity increases
Solution Approach 1:
The safety system is divided into functional modules: sensor units for environmental detection, processing units for trajectory calculation, and actuator units for execution. This segmentation allows complex autonomous functions to be implemented through coordinated simple modules, managing overall system complexity while maintaining high reliability.
Solution Approach 2:
The control device performs multiple functions: it monitors environmental data, determines collision risks, calculates target trajectories, and executes driving interventions. This multi-functionality consolidates what could be separate complex systems into a single universal control unit, improving reliability without proportionally increasing complexity.
3Reliability
If the safety system continuously monitors environmental data and determines target trajectories, then the ability to avoid secondary collisions improves, but the loss of time for processing increases
Solution Approach 1:
The system continuously monitors environmental data and pre-calculates potential target trajectories before collisions occur. This preliminary action allows the control device to have ready-made trajectory options when a collision is detected, reducing the time needed for post-collision processing while maintaining reliable avoidance capabilities.
Solution Approach 2:
The safety system operates continuously, constantly gathering sensor data and maintaining awareness of the environment and potential hazards. This continuous operation eliminates idle processing time between events, allowing the system to immediately determine and execute target trajectories when needed, thus reducing time loss while ensuring reliable safety responses.
Data Source
AI summary
A method for operating a safety system of a motor vehicle includes the steps of determining a target trajectory of the motor vehicle to be realized with the safety system after an unavoidable collision, wherein the target trajectory is assigned to a target position of the motor vehicle, which target position is safe with regard to secondary collisions, and performing at least one autonomous and/or supporting driving intervention in the form of at least one of a longitudinally guiding intervention and a transverse guiding intervention after the collision for realizing the target trajectory.