Vehicle Steering Control Using Offset Target and Dead Zone
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Solution Overview
Problem
When following a smaller vehicle, existing follow-up traveling systems can cause the own vehicle to become oversensitive, leading to meandering and swerving behaviors due to factors like vehicle weight and gravity center, resulting in anxiety for the driver.
Innovation Solution
A vehicle traveling control apparatus that sets a control target point ahead of the own vehicle in the vehicle width direction and corrects the steering angle based on deviations, using a dead zone for steering control set according to the shape data of the preceding vehicle to suppress unnecessary behaviors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the own vehicle follows the center position of a smaller preceding vehicle, then the follow-up traveling control can track the preceding vehicle, but the own vehicle becomes oversensitive and exhibits meandering and swerving behaviors
Solution Approach 1:
The patent changes the control parameter from tracking the center position to tracking a set position that is offset from the center in the vehicle width direction. This parameter change in the control target position reduces the sensitivity of the own vehicle to disturbances affecting the smaller preceding vehicle, thereby suppressing meandering and swerving behaviors while maintaining adequate tracking capability
Solution Approach 2:
The patent introduces a dead zone as an intermediary element in the control system. This dead zone acts as a buffer that filters out small deviations and disturbances, preventing them from triggering excessive steering corrections. The dead zone mediates between the tracking requirement and the stability requirement by allowing certain范围内的位置偏差 without initiating corrective action
2Manufacturing precision
If the steering control is highly sensitive to track the preceding vehicle, then the follow-up traveling is accurate, but unnecessary steering corrections increase driver anxiety
Solution Approach 1:
The patent modifies the control target from the center position to a set position offset in the vehicle width direction. This parameter change creates a more stable control point that reduces the frequency and magnitude of steering corrections needed, thereby maintaining adequate tracking precision while reducing unnecessary steering actions that cause driver anxiety
Solution Approach 2:
The dead zone serves as an intermediary that filters out minor position deviations before they reach the steering control system. By introducing this buffer zone, the system achieves a balance between responsive tracking and smooth control, eliminating jittery steering corrections while maintaining adequate follow-up accuracy
Data Source
AI summary
A vehicle traveling control apparatus includes a first setting unit and a correcting unit. The control target point setting unit sets a set position of a preceding vehicle ahead of an own vehicle in a vehicle width direction as a control target point of follow-up traveling for traveling while following the preceding vehicle. The steering control amount correcting unit corrects, on a basis of deviation between a target steering angle that brings the own vehicle to the control target point and an actual steering angle, an amount of a steering control that controls the own vehicle to the target steering angle which is a steering angle that brings the own vehicle to the control target point.