Safety Actuator Intervention Control via Driver Controllability Assessment
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Solution Overview
Problem
Existing safety systems in motor vehicles often intervene excessively in driving operations, potentially disrupting the driver's control, especially in situations where the driver's ability to manage the vehicle is compromised, such as high speeds or low controllability scenarios.
Innovation Solution
A method for controlling safety actuators in motor vehicles that determines a hazard model using anticipatory sensors and driving operation characteristics, adjusting the degree of intervention based on the driver's controllability, including seat adjustments and belt tensioning, to optimize the activation of safety actuator systems and prevent excessive intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If safety actuators are activated to protect occupants, then occupant safety is improved, but driver control over the vehicle is reduced
Solution Approach 1:
The system dynamically adjusts the intervention strength of safety actuators based on real-time assessment of driver controllability parameters (vehicle speed, sideslip angle, steering angle). When driver control capability is high, actuator intervention is minimized; when driver control capability deteriorates, intervention is increased to ensure occupant safety.
Solution Approach 2:
The safety actuator system transitions from static activation to dynamic control, continuously adapting its intervention level based on changing driving conditions and driver controllability. The system monitors multiple parameters and adjusts actuator activation in real-time to maintain optimal balance between safety and driver control.
2Reliability
If safety actuators intervene strongly in driving operations, then occupant protection is improved, but driver ability to control the vehicle is compromised
Solution Approach 1:
The system applies differentiated intervention strategies to different safety actuators based on specific driving conditions. Not all actuators are activated with the same intensity; instead, intervention is localized and tailored to the specific hazard and driver controllability assessment, preserving driver control where possible while protecting occupants where necessary.
Solution Approach 2:
The system employs partial intervention by activating only the necessary safety actuators with appropriate intensity based on the assessed hazard level and driver controllability. This avoids excessive intervention that would completely override driver control, while still providing sufficient protection when needed.
3Speed
If the safety system activates actuators based on hazard detection, then response time is improved, but false interventions may occur when driver control is still adequate
Solution Approach 1:
The system incorporates continuous feedback loops that monitor driver controllability parameters (vehicle speed, sideslip angle, steering angle) and adjust safety actuator activation accordingly. This feedback mechanism prevents false interventions by continuously assessing whether driver control capability has deteriorated to a level requiring actuator assistance.
Solution Approach 2:
The system performs preliminary assessment of driver controllability before activating safety actuators. By evaluating driver control capability in advance based on multiple parameters, the system可以避免 premature or false interventions while maintaining rapid response capability when actual hazards are detected.
Data Source
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AI summary
Method for driving a safety actuator system (70) of a motor vehicle, comprising: determining a risk model (40) of the motor vehicle by means of a predictive sensor system and at least one characteristic value (10, 20) of a drive mode of the motor vehicle; determining a controllability (41) of the motor vehicle by a driver of the motor vehicle by means of the at least one characteristic value; and driving the safety actuator system to an extent which depends on the risk model and on the controllability.