Vehicle Steering Control for Lane Keeping Assist
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle control systems for lane keeping assist (LKA) face interference between driver steering intentions and LKA control, leading to a decline in control quality due to the inability to reflect driver intentions without compromising convergence accuracy.
Innovation Solution
A vehicle control apparatus that includes a difference detecting device, determining device, controller, steering input detecting device, and correcting device to accurately reflect driver steering intentions while maintaining LKA control quality by adjusting the control amount and allowing for override operations without interfering with LKA convergence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the steering control amount is corrected to reflect driver steering intention during lane keeping assist, then the driver's steering input is reflected, but the lane keeping assist convergence significantly decreases
Solution Approach 1:
The patent segments the steering control into two independent parts: LKA control amount (for path convergence) and damping control amount (for driver intention reflection). By separating these functions, the system can maintain high convergence accuracy while still responding to driver inputs through the damping component, thus resolving the contradiction between reflecting driver intention and maintaining convergence precision
Solution Approach 2:
The system dynamically adjusts the damping control amount based on detected steering inputs from the driver. When driver input is detected, the damping amount is increased to reflect the driver's steering intention without affecting the LKA convergence control. This dynamic adjustment allows the system to adapt between maintaining convergence and reflecting driver intention based on real-time conditions
2Ease of operation
If the steering control amount is reduced to prevent interference with driver steering input, then interference between steering control and driver operation is prevented, but the control quality of lane keeping assist declines
Solution Approach 1:
The patent divides the steering control into two independent control amounts: LKA control amount that maintains high convergence quality, and damping control amount that prevents interference with driver operation. This segmentation allows both driver operation ease and control quality to be maintained simultaneously without compromising either function
Solution Approach 2:
The damping control acts as an intermediary between the LKA control system and the driver's steering input. By introducing this intermediate damping component, the system can smooth out conflicts between automatic LKA corrections and driver intentions, preventing direct interference while maintaining overall control quality through the combined effect of both control amounts
Data Source
AI summary
A vehicle control apparatus that controls a vehicle provided with a steering force applying device capable of applying steering force to induce a change in a steering angle of a steered wheel to the steered wheel, includes a difference detecting device that detects a positional difference that determines a relative positional relationship between a target running path to be maintained and the vehicle; a determining device that determines a control amount of the steering force applying device based on the detected positional difference; a controller that maintains a running path of the vehicle on the target running path by controlling the steering force applying device according to the determined control amount; a steering input detecting device that detects a steering input to a steering input device by a driver; and a correcting device that corrects a determining reference of the control amount of the steering force applying device such that, when a steering input is detected while the running path is maintained on the target running path, this steering input is reflected.