Steering Friction Compensation for Lane Deviation Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lane deviation prevention systems in vehicles often cause unsmooth torque variations and incongruity for drivers due to uncontrolled friction compensation in steering systems during lane deviation prevention control, leading to potential lane deviation issues.
Innovation Solution
A lane deviation prevention control device with a target steering torque calculator, friction torque estimator, and friction compensation rate variable controller, which calculates and adjusts the friction compensation rate based on driver steering torque and vehicle state to compensate for friction in the steering system, ensuring smooth operation and preventing lane deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If friction compensation is applied in lane deviation prevention control, then lane deviation prevention precision is improved, but torque variation smoothness deteriorates due to uncontrolled friction compensation
Solution Approach 1:
The friction compensation rate is made dynamically adjustable rather than fixed. The control device varies the friction compensation rate based on driving conditions and steering torque requirements, allowing optimal friction compensation in different scenarios while maintaining torque smoothness.
Solution Approach 2:
The friction compensation rate is changed as a controllable parameter. By adjusting this parameter according to steering torque and driving conditions, the system achieves both precise lane deviation prevention and smooth torque variation.
2Measurement precision
If friction compensation is applied in lane deviation prevention control, then lane deviation prevention precision is improved, but driver comfort deteriorates due to incongruity in steering feel
Solution Approach 1:
The friction compensation rate adapts dynamically to driver steering inputs and driving conditions. When driver torque increases, the compensation rate adjusts to maintain natural steering feel, preventing driver discomfort while preserving lane deviation prevention effectiveness.
Solution Approach 2:
The control device uses feedback from steering torque sensors and driving condition detectors to continuously adjust the friction compensation rate. This feedback mechanism ensures that friction compensation aligns with driver intentions and maintains comfortable steering operation.
3Device complexity
If fixed friction compensation rate is used, then control simplicity is maintained, but control precision deteriorates under varying driving conditions
Solution Approach 1:
The system transitions from fixed to dynamic friction compensation rate control. The friction compensation rate is automatically adjusted based on detected driving conditions and steering torque, achieving high precision control without requiring complex manual intervention.
Solution Approach 2:
The control device automatically determines and adjusts the friction compensation rate based on its own sensors and processors. The system self-regulates friction compensation without external input, maintaining precision across varying conditions while keeping the user interface simple.
Data Source
AI summary
A lane deviation prevention control device for a vehicle includes a target steering torque calculator, a friction torque estimator, and a friction compensation rate variable controller. The target steering torque calculator calculates target steering torque to be applied to a steering system of an own vehicle in a lane deviation prevention control. The friction torque estimator estimates friction torque of the steering system. The friction compensation rate variable controller performs, on the basis of steering torque produced by a driver's steering operation and on the basis of a traveling state of the own vehicle, a variable control of an addition rate at which the friction torque is added to the target steering torque to compensate friction of the steering system.