Steer-by-Wire Visual Feedback for Steering Angle Misalignment
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Solution Overview
Problem
In vehicles with steer-by-wire technology, misalignments between the road wheel angle and steering wheel angle can occur due to different driving modes, leading to a confusing steering experience for drivers, especially in autonomous modes, as there is no mechanical linkage to provide intuitive feedback.
Innovation Solution
A vehicle control system that includes a road wheel actuator, feedback actuator, sensor network, and a display to detect and visually indicate misalignments between the road wheel and steering wheel angles, providing intuitive guidance to drivers for manual corrections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If steer-by-wire technology is implemented with different steering ratios for different driving modes, then the vehicle's adaptability to different driving conditions is improved, but misalignment between road wheel angle and steering wheel angle occurs causing confusion for the driver
Solution Approach 1:
The system continuously monitors the alignment between steering wheel angle and road wheel angle using sensors, and provides real-time visual feedback to the driver through a display interface. This feedback mechanism allows the driver to understand the misalignment state and make appropriate manual corrections, resolving the information loss caused by steer-by-wire mode transitions.
Solution Approach 2:
A visual display interface acts as an intermediary between the steering system components and the driver. This intermediary translates complex angular misalignment data into intuitive visual representations, enabling the driver to comprehend the relationship between steering wheel position and actual road wheel position without direct mechanical feedback.
2Extent of automation
If mechanical linkage is removed in steer-by-wire system, then the vehicle's automation and control flexibility are improved, but intuitive steering feedback to the driver is lost
Solution Approach 1:
The system replaces mechanical feedback linkage with an electronic visual feedback system. Sensors detect steering wheel and road wheel angles, and a display interface provides visual information to the driver, substituting direct mechanical coupling with electronic measurement and visual presentation to maintain ease of operation in automated steering modes.
Solution Approach 2:
The visual display serves as an intermediary that bridges the gap between automated steering control and driver intent. By presenting alignment information visually, the system compensates for the loss of mechanical feedback, allowing drivers to maintain intuitive understanding of steering state even without direct mechanical connection.
Data Source
AI summary
A vehicle control system for a vehicle with steer-by-wire steering may include a road wheel actuator operably coupled to a road wheel of the vehicle to position the road wheel based to a road wheel angle based on a target angle, a feedback actuator operably coupled to a steering wheel of the vehicle to generate the target angle based on a steering wheel angle and to generate feedback to an operator of the vehicle, a sensor network comprising sensors to detect the steering wheel angle and the road wheel angle, a display disposed in the vehicle to be visible to the operator of the vehicle during vehicle operation, and a controller for determining when a misalignment exists between the road wheel angle and the steering wheel angle and providing a visual indication of the misalignment on the display.