Post-Collision Yaw Stabilization With Steering Intent Detection
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Solution Overview
Problem
Existing vehicle control systems face challenges in preventing unintended vehicle behaviors post-collision, where drivers may unintentionally steer, leading to worsened conditions such as spin or understeer, due to the override of attitude stabilization control.
Innovation Solution
A vehicle control apparatus comprising a contact detector, attitude stabilization processor, and steering intention determining unit, which detects contact with an object and determines the driver's steering intention. It stops or reduces the yaw moment generated by attitude stabilization control if the driver's intention to steer is absent, except when the steering wheel is gripped and the steering direction is corrective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If attitude stabilization control is executed after collision to correct vehicle attitude, then vehicle stability is improved, but unintended steering operations by panicked driver can worsen vehicle attitude
Solution Approach 1:
The system continuously monitors steering torque and steering angle to detect driver input in real-time. When driver steering input is detected after collision, the attitude stabilization control is overridden or stopped, preventing the system from counteracting the driver's corrective steering actions and avoiding worsening of vehicle attitude
Solution Approach 2:
The control system dynamically adjusts its behavior based on collision severity and detected driver input. The override determination unit evaluates whether to stop or override the attitude stabilization control algorithm based on real-time conditions, making the system adaptable to different post-collision scenarios
2Object-affected harmful factors
If attitude stabilization control is stopped after collision to prevent unintended steering effects, then harmful effects from panicked driver operations are reduced, but vehicle attitude may not be properly stabilized
Solution Approach 1:
The system uses continuous feedback from steering torque sensors and steering angle sensors to determine when to stop or override attitude stabilization control. This feedback mechanism ensures the system only disables stabilization when actual driver input is detected, maintaining stabilization benefits while preventing harmful unintended operations
Solution Approach 2:
The override determination unit acts as an intermediary between the attitude stabilization control algorithm and the actual control execution. It evaluates driver input signals and collision data to make intelligent decisions about whether to allow stabilization control to operate, thereby balancing stability benefits with prevention of harmful effects
3Measurement precision
If steering intention is determined using multiple parameters (steering torque, steering angle, gripping state), then accuracy of detecting driver intention is improved, but device complexity increases
Solution Approach 1:
The steering operation detecting unit serves multiple functions: it detects steering torque, steering angle, and gripping state, and uses these inputs to determine both driver steering intention and collision conditions. This multi-functional approach improves detection accuracy without requiring completely separate detection systems for each parameter
Data Source
AI summary
A vehicle control apparatus includes a contact detector, an attitude stabilization processor, and a steering intention determining unit. The contact detector is configured to detect a contact of a vehicle with an object. The attitude stabilization processor is configured to execute an attitude stabilization control that generates a yaw moment at a vehicle body on the basis of a deviation between a target yaw rate and an actual yaw rate. The steering intention determining unit is configured to determine a presence of a driver's intention to perform steering. The attitude stabilization processor is configured to stop the generation of the yaw moment by the attitude stabilization control or reduce the yaw moment to be generated by the attitude stabilization control, in a case where the steering intention determining unit determines that the driver's intention to perform the steering is absent after the detection of the contact by the contact detector.