Steering Stiffening for Autonomous Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Driver assistance systems face issues with drivers overreacting when taking back lateral control after autonomous driving, leading to potential accidents due to steering overcorrection, especially at higher speeds, as they may inadvertently turn the steering wheel upon resuming control.
Innovation Solution
The system temporarily stiffens the steering by reducing steering assistance, applying counter torque, or changing the steering ratio to prevent unintended steering wheel movements, with the stiffening duration and strength adjusted based on vehicle speed and situational factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driver takes over lateral guidance after autonomous driving, then the driver regains control of the vehicle, but the driver may inadvertently turn the steering wheel causing steering overrun
Solution Approach 1:
The system applies a counter torque to the steering wheel before the driver can inadvertently turn it, preventing the steering overrun from occurring in the first place. This preliminary opposing action neutralizes the harmful effect of the driver's unintended steering movement.
Solution Approach 2:
The steering assistance parameter is dynamically adjusted based on the autonomous driving status. When transitioning from autonomous to manual control, the steering assistance is reduced or temporarily disabled, changing the steering characteristics to prevent inadvertent turns while maintaining normal assistive steering during autonomous operation.
2Ease of operation
If steering assistance is maintained during handover, then steering is easier for the driver, but unintended steering movements cause lane deviation
Solution Approach 1:
The steering assistance system dynamically adapts its characteristics based on the driving mode and handover status. During autonomous driving, full steering assistance is provided for ease of operation. During handover and immediately after, the assistance is temporarily reduced or modified to prevent harmful lane deviations, creating a time-dependent dynamic system.
Solution Approach 2:
The system monitors the autonomous driving status and handover events, using this feedback to automatically adjust steering assistance parameters. When the system detects that autonomous driving has ended and the driver is taking over, it triggers the steering assistance reduction to prevent lane deviation, then restores normal assistance once the handover is complete.
Data Source
Figure 1
Figure 2~3
Figure 4A~4B
AI summary
The invention relates to a method for providing assistance to a driver of a vehicle (10), wherein the vehicle (10) comprises a driving assistance system which permits at least temporary autonomous driving, and after the ending of the autonomous driving requests the driver to assume control of the lateral guidance of the vehicle (10) by means of at least one signal. In addition, there is provision that the steering of the vehicle (10) is made harder for a predefined time after the requesting of the assumption of control of the lateral guidance. Further aspects of the invention relate to a computer program and to a device which are configured to carry out the method.