Lane Keeping System Steering Wheel Contortion Compensation
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Solution Overview
Problem
As vehicles age, steering wheel distortion can occur due to mechanical component deterioration, leading to errors in maintaining the vehicle within its lane, affecting steering control and safety.
Innovation Solution
A system and method that includes an input information generation unit for measuring dynamic vehicle characteristics, a steering wheel contortion angle calculation unit, and a control unit to calculate a desired yaw rate and command steering wheel angle, compensating for the steering wheel contortion angle, using sensors, GPS, and a Kalman estimator to maintain lane position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If steering wheel function is maintained over long period, then vehicle safety is improved, but steering wheel distortion occurs due to aging causing lane keeping errors
Solution Approach 1:
The system performs preliminary detection of steering wheel distortion through sensors (steering wheel angle sensor, yaw rate sensor) and calculates the distortion angle before it significantly affects lane keeping. By detecting and compensating for distortion in advance, the system maintains steering accuracy despite aging-related shape changes.
Solution Approach 2:
The system changes the steering control parameter by adding a distortion compensation angle to the original steering wheel angle command. This parameter adjustment compensates for the physical distortion of the steering wheel, allowing the vehicle to maintain accurate lane keeping despite the steering wheel's altered geometry due to aging.
2Measurement precision
If steering wheel distortion is compensated in real-time, then lane keeping accuracy is improved, but system complexity increases
Solution Approach 1:
The system uses feedback from steering wheel angle sensors and yaw rate sensors to continuously monitor actual steering conditions. This feedback is processed to calculate distortion compensation angles, which are then applied to maintain accurate lane keeping. The feedback loop enables real-time distortion compensation without requiring overly complex system architecture.
Solution Approach 2:
The control unit acts as an intermediary that receives raw sensor data, calculates distortion compensation angles, and generates corrected steering commands. This intermediary processing layer simplifies the overall system by centralizing the distortion compensation logic in a single control unit rather than requiring complex modifications throughout the steering system.
Data Source
AI summary
The present invention relates, in general, to a system and method for keeping a vehicle in a lane in consideration of a steering wheel contortion angle, and more particularly, to a system for keeping a vehicle in a lane in consideration of a steering wheel contortion angle, which estimates the path of a vehicle in consideration of a steering wheel contortion angle attributable to the distortion of a steering shaft, thus improving the safety and riding comfort of occupants.