Driving Assistance Deactivation Controller Thresholds
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Solution Overview
Problem
Existing driving assistance systems lack the ability to appropriately deactivate automatic lane change and lane keeping controls, limiting driver flexibility during merging, lane changes, and other scenarios, as they do not account for small adjustments in steering, acceleration, or deceleration.
Innovation Solution
A driving assistance system with a deactivation controller that sets distinct threshold values for automatic lane change and lane keeping controls, allowing for more nuanced driver intervention by differentiating between steering, acceleration, and braking inputs, enabling continued automatic lane changes while allowing small adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single deactivation threshold value is used for both automatic lane change control and lane keeping control, then the control system is simpler to manage, but the deactivation timing cannot be optimized for different control modes
Solution Approach 1:
The patent divides the deactivation threshold setting into separate segments for different control modes. Specifically, it establishes a first deactivation threshold value for automatic lane change control and a second deactivation threshold value for lane keeping control, allowing each control mode to have optimized deactivation criteria suited to its specific operational requirements
2Ease of operation
If the deactivation threshold is set low to allow driver adjustments, then driver flexibility is improved, but the control may be deactivated too easily during normal operation
Solution Approach 1:
The patent applies different threshold values tailored to specific control modes. The first deactivation threshold value is optimized for automatic lane change control to permit driver adjustments during merging, while the second deactivation threshold value is optimized for lane keeping control to maintain stability during normal lane maintenance, giving each control mode its own appropriate sensitivity level
3Reliability
If the deactivation threshold is set high to prevent premature deactivation, then control stability is improved, but driver adjustments during merging are restricted
Solution Approach 1:
The patent implements dynamic threshold selection based on the active control mode. When automatic lane change control is active, the system uses the first deactivation threshold value that is more permissive to driver inputs. When lane keeping control is active, it switches to the second deactivation threshold value that is more conservative. This dynamic adaptation allows the system to optimize between stability and driver flexibility based on operational context
Data Source
AI summary
A driving assistance system includes a deactivation controller that controls deactivation of Automatic Lane Change (ALC) control and a second driving assistance control (such as lane keeping control). During the ALC control, the deactivation controller deactivates the ALC central when, for example, a control amount by a driver of a steering wheel or the like has exceeded a first deactivation threshold value. During the second driving assistance control, the deactivation controller deactivates the second driving assistance control when, for example, the control amount has exceeded a second deactivation threshold value. The first deactivation threshold value and the second deactivation threshold value are set to differ from each other.