Vehicle Steering Assist Control Timing Logic
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Solution Overview
Problem
Existing vehicle driving assist systems fail to appropriately assist the driver's steering operation when avoiding obstacles, as they either cancel automatic steering control upon detecting driver intervention or do not provide sufficient assistance during rapid obstacle approach, leading to potential collisions.
Innovation Solution
A vehicle driving assist apparatus equipped with sensors and an electronic control unit that initiates collision avoidance steering assist control based on the driver's steering operation, continues the control for a predetermined time even if the driver performs counter-steering, and transitions to lane return assist control after the obstacle is avoided, ensuring the vehicle remains on its original lane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the automatic steering control is cancelled immediately when driver intervention is detected, then the driver's steering operation is not interfered with, but the collision avoidance assistance is interrupted and may fail to avoid collision
Solution Approach 1:
The control system dynamically adjusts its response based on the timing of driver intervention. When the driver steers in the same direction as the automatic control, the system maintains assistance. When the driver steers in the opposite direction after a predetermined time, the system cancels assistance. This dynamic adaptation resolves the contradiction by making the system flexible enough to accommodate driver intent while maintaining safety.
Solution Approach 2:
The system continuously monitors the driver's steering operations and compares them with the automatic steering control directions. Based on this feedback, the system determines whether to maintain or cancel assistance. The predetermined time threshold serves as a feedback criterion to distinguish between accidental counter-steering and intentional driver override, thereby resolving the contradiction between responsiveness and safety.
2Reliability
If the automatic steering control continues without cancellation when counter-steering is detected, then collision avoidance is maintained, but the driver's intended steering operation is interfered with
Solution Approach 1:
The system employs dynamic cancellation criteria that consider both the direction and timing of driver input. The predetermined time threshold creates a dynamic boundary: counter-steering within this period triggers cancellation to respect driver intent, while counter-steering beyond this period maintains assistance to ensure safety. This resolves the contradiction by adapting the system behavior to the specific context of each intervention.
Solution Approach 2:
The system establishes a predetermined time threshold in advance as a decision criterion. This preliminary condition allows the system to distinguish between transient counter-steering (likely accidental or corrective) and sustained counter-steering (likely intentional override). By having this criterion ready, the system can respond appropriately without delay, resolving the contradiction between maintaining assistance and respecting driver intent.
3Reliability
If the system requires high steering torque to detect driver intervention, then false detections are reduced, but genuine driver steering operations with low torque are not detected
Solution Approach 1:
The system changes the detection parameter from steering torque alone to a combination of steering torque and steering angular velocity. This multi-parameter approach allows the system to detect driver intervention across a wider range of steering operations, from gentle corrections to rapid maneuvers. By considering both the magnitude and rate of steering input, the system maintains high detection accuracy while adapting to various driving styles and situations.
Solution Approach 2:
The detection system serves multiple functions: it detects both strong and gentle steering inputs, distinguishes between intentional and unintentional counter-steering, and adapts to different driving scenarios. The combination of torque and angular velocity thresholds creates a universal detection mechanism that works across diverse operating conditions, resolving the contradiction between specificity and versatility.
Data Source
AI summary
A vehicle driving assist apparatus of the invention starts a collision avoidance steering assist control to automatically steer the vehicle to avoid a collision of the vehicle with the obstacle in response to a driver performing a collision avoidance steering operation for avoiding the collision when there is a possibility that the vehicle collides with the obstacle. The vehicle driving assist apparatus cancels the collision avoidance steering assist control in response to the driver performing a counter collision avoidance steering operation against automatically steering the vehicle intended to be achieved by the collision avoidance steering assist control after a first predetermined time elapses from starting the collision avoidance steering assist control. The vehicle driving assist apparatus continues the collision avoidance steering assist control until the first predetermined time elapses from starting the collision avoidance steering assist control even when the driver performs the counter collision avoidance steering operation.