Driving Assistance Apparatus Avoidance Control Timing
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Solution Overview
Problem
Existing driving assistance systems cause discomfort for drivers when performing avoidance assistance control due to simultaneous deceleration and steering controls, especially when a deceleration factor like a stop line is present, as they do not adequately differentiate between deceleration and avoidance controls.
Innovation Solution
A driving assistance apparatus with a predictor to determine if a deceleration operation will be performed by the driver due to a deceleration factor, and a changer that adjusts the assistance amount or start timing of the avoidance assistance control accordingly, reducing unnecessary control actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If avoidance assistance control is performed based on target to avoid information, then collision avoidance capability is improved, but driver discomfort increases when deceleration control is simultaneously performed due to deceleration factors
Solution Approach 1:
The system performs preliminary prediction of deceleration operations based on detected deceleration factors (stop lines, traffic lights, curves) before the avoidance assistance control is executed. This allows the system to anticipate the driver's intended deceleration and adjust the avoidance control timing accordingly, preventing conflicting control actions and driver discomfort
Solution Approach 2:
The system dynamically adjusts the avoidance assistance control parameters (assistance amount and start timing) based on the predicted deceleration operation. When deceleration is predicted, the system reduces assistance amount or delays start timing; when deceleration is not predicted, normal avoidance control is applied. This dynamic adaptation resolves the contradiction between maintaining collision avoidance capability and ensuring driver comfort
2Reliability
If avoidance assistance control is performed as usual when driver decelerates due to deceleration factor, then collision avoidance function is maintained, but driver discomfort increases due to unnecessary control actions
Solution Approach 1:
The system performs preliminary detection of deceleration factors and prediction of driver deceleration operations before executing avoidance assistance control. This advance prediction allows the system to coordinate control actions properly, maintaining collision avoidance function while avoiding unnecessary or conflicting control interventions that would increase complexity
Solution Approach 2:
The system uses feedback from the predicted deceleration operation to adjust the avoidance assistance control. The prediction result feeds back into the control decision-making process, enabling the system to suppress or delay avoidance control when driver deceleration is anticipated, thereby maintaining simple and coordinated control behavior
Data Source
AI summary
A driving assistance apparatus includes: an assistor configured to perform an avoidance assistance control when there is a target to avoid, ahead of a vehicle, to avoid a collision between the vehicle and the target; a predictor configured to predict that a deceleration operation of the vehicle will be performed, on the basis of a deceleration factor, which is different from the target and which is located in surroundings of the vehicle, when there is the target ahead of the vehicle; and a changer configured in such a manner that when it is predicted that the deceleration operation will be performed, the changer performs at least one of a process of reducing an assistance amount associated with the avoidance assistance control and a process of delaying start timing of the avoidance assistance control, in comparison with those when it is not predicted that the deceleration operation will be performed.