Steering Torque Deviation Detection for Vehicle Lateral Guidance
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Solution Overview
Problem
Existing driver assistance systems, such as lane keeping assistants, face challenges in accurately determining driver interaction due to external disruptions and system interference, leading to potential false interventions and reduced safety.
Innovation Solution
A driver assistance system comprising a steering assistance module, detection module, and determination module that evaluates the deviation between setpoint and actual steering settings to adjust steering torque, allowing for improved driver interaction and minimizing interference from external factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lane keeping assistant uses manual torque detection to identify driver interaction, then the system can detect driver intervention, but external disruptions and system interference cause false interventions and reduced accuracy
Solution Approach 1:
The patent introduces an intermediary comparison mechanism between the driver assistance system's requested steering setting and the actual steering setting. This intermediary comparison allows the system to distinguish between genuine driver intervention and false interventions caused by external disruptions or system interference, thereby improving detection accuracy and reducing false positives.
Solution Approach 2:
The system implements feedback by continuously comparing the requested steering setting (from the driver assistance system) with the actual steering setting (from the steering sensor). This feedback loop enables the system to detect deviations and adjust its response accordingly, improving the reliability of driver interaction detection by validating actions against real-time system state.
2Reliability
If the lane keeping assistant continuously monitors manual torque, then the system can detect when driver hands leave the steering wheel, but the monitoring itself affects the steering torque and creates interference
Solution Approach 1:
The patent uses an intermediary comparison approach where the system monitors the deviation between requested and actual steering settings rather than directly measuring manual torque for driver presence detection. This intermediary method reduces the harmful interference caused by continuous torque monitoring while maintaining reliable detection of driver presence and intervention.
3Speed
If the driver assistance system applies strong steering torque to correct lane deviations, then the vehicle returns to lane center quickly, but the driver must work against the system during corrections
Solution Approach 1:
The patent applies dynamics by making the steering torque adaptive rather than static. The system adjusts the steering torque based on the detected deviation between requested and actual steering settings, reducing torque when the driver is actively correcting the vehicle and increasing it when needed for lane keeping. This dynamic adjustment maintains fast response while reducing unnecessary driver effort.
Solution Approach 2:
The system changes the parameter of steering torque based on the deviation measure between requested and actual steering settings. By dynamically adjusting this parameter according to real-time driving conditions and driver actions, the system maintains efficient lane keeping performance while adapting to reduce driver effort during corrective maneuvers.
Data Source
AI summary
The present disclosure relates to a driving assistance system for assisting lateral guidance of a vehicle. The driving assistance system includes a steering assistance module configured to output a desired steering adjustment; a detection module configured to detect an actual steering adjustment; and a determination module configured to relate the desired steering adjustment and the actual steering adjustment to one another in order to determine a degree of difference between the desired steering adjustment and the actual steering adjustment. The steering assistance module is further configured to adjust a steering torque based on the degree of difference between the desired steering adjustment and the actual steering.