Adaptive Steering Force Prediction for Lane Keeping
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Solution Overview
Problem
Existing lane keeping systems face limitations in applying guiding forces to the steering device due to legal constraints, leading to incomplete interventions and potential false safety perceptions, especially when the applied force is insufficient to prevent unintentional lane departures.
Innovation Solution
A method and system that predict the required guiding force to avoid lane departures, compare it with a predefined limit, and decide whether to apply it, ensuring the force is sufficient or limited to maintain driver control, using a combination of predictive models for steering feel and safety functions like lane keeping, which can decouple the steering feel from mechanical friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the guiding force is increased to ensure effective lane keeping intervention, then the safety and effectiveness of the intervention is improved, but the driver's control authority and comfort deteriorate due to excessive force
Solution Approach 1:
The guiding force is made dynamic and adaptive rather than fixed. The control system continuously adjusts the magnitude of the guiding force based on real-time assessment of driver input, lane departure risk, and driving conditions. This allows the system to apply sufficient force for effective intervention when needed while reducing force when driver control is sufficient, resolving the contradiction between intervention effectiveness and driver comfort.
Solution Approach 2:
The system changes the parameter of guiding force magnitude based on assessed needs. By predicting the total guiding force required and comparing it with limit values, the system dynamically adjusts the force parameter to achieve effective lane keeping while staying within acceptable limits for driver comfort and control authority.
2Ease of operation
If the guiding force is limited to comply with legal requirements, then driver comfort and control are maintained, but the intervention becomes insufficient and may create false safety perception
Solution Approach 1:
The system performs preliminary assessment and prediction of the total guiding force required before applying the force. By predicting whether the required force would exceed legal limits in advance, the system can make informed decisions about intervention strategy, ensuring that interventions are both legally compliant and sufficiently effective to maintain safety without creating false perceptions.
Solution Approach 2:
The system incorporates feedback mechanisms that continuously monitor the effectiveness of interventions and adjust subsequent actions accordingly. By assessing whether the limited guiding force is sufficient to prevent lane departures and adjusting future interventions based on this feedback, the system maintains both legal compliance and safety effectiveness over time.
3Reliability
If the system applies guiding force during driver steering operation, then lane keeping effectiveness is improved, but the complexity of force management and driver-system interaction increases
Solution Approach 1:
The lane keeping function is merged with the power-assisted steering system, combining safety functions with existing steering assistance. This integration allows the system to apply guiding forces through the existing steering mechanism without requiring separate complex intervention systems, reducing overall complexity while maintaining effectiveness.
Solution Approach 2:
The power-assisted steering system performs multiple functions: it provides both the driver with steering assistance and the lane keeping system with the capability to apply guiding forces. This multi-functionality eliminates the need for separate intervention mechanisms, simplifying the overall system architecture while achieving effective lane keeping during driver operations.
Data Source
AI summary
A method for assisting a driver of a vehicle during operation in order to avoid an undesired situation based on a current driving scenario includes predicting if a first guiding force to a vehicle steering device is desired in order to avoid the undesired situation and, if the first guiding force is desired, predicting a total guiding force comprising the first guiding force, which would be applied to the steering device for avoiding the undesired situation, comparing the predicted total guiding force with a limit value, and if the predicted total guiding force exceeds the limit value, in advance, deciding whether to apply the predicted total guiding force to the steering device for avoiding the undesired situation or not.