Automatic Steering Wheel Control for Early Driver Override Detection
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Solution Overview
Problem
During automatic driving modes where steering input is not required, driver steering operations are sometimes misinterpreted as disturbances, leading to impaired steering wheel operation feeling due to delayed detection and subsequent force cancellation.
Innovation Solution
A steering device that determines driver steering operations early by analyzing steering angle and target steering angle, adjusting operation characteristics to reduce required steering force, and includes an electronic control unit to manage automatic steering assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the vehicle uses automatic steering mode where steering input is not required, then automation level is improved, but driver steering operations are misinterpreted as disturbances causing impaired operation feeling
Solution Approach 1:
The system performs preliminary detection of driver steering operations by monitoring steering angle deviations from target angles before the automatic steering system reacts. This early detection allows the system to recognize driver intent promptly and switch from disturbance cancellation mode to assistance mode, preventing impairment of operation feeling while maintaining high automation level
Solution Approach 2:
The system continuously monitors the steering angle and compares it with the target steering angle to detect driver operations. This feedback mechanism enables real-time identification of driver steering inputs during automatic steering mode, allowing the system to adjust its response appropriately and maintain natural operation feeling
2Stability of the object's composition
If the vehicle delays detection of driver steering operation, then system stability is improved, but steering force cancellation is applied incorrectly impairing operation feeling
Solution Approach 1:
The system performs preliminary detection by monitoring steering angle deviations from target angles before the automatic steering system reacts. This early detection allows the system to recognize driver intent promptly and switch from disturbance cancellation mode to assistance mode, preventing impairment of operation feeling while maintaining high automation level
Solution Approach 2:
The system applies preliminary anti-action by detecting steering angle deviations that indicate driver operations and preemptively switching from disturbance cancellation to assistance mode. This prevents the harmful effect of incorrect force cancellation before it can impair operation feeling
Data Source
AI summary
The steering device is configured to automatically perform a steering operation of a steering wheel. The steering device is configured to determine that the steering operation of the steering wheel has been performed by the driver based on the steering angle of the steering wheel and the target steering angle, at least during a driving mode in which the steering operation of the steering wheel is automatically performed, and when it is determined that the steering operation of the steering wheel has been performed by the driver, change the operation characteristics of the steering wheel so that the steering force required when the driver steers the steering wheel is reduced compared to before the determination.