Steer-by-Wire Steering Angle Alignment Error Diagnosis and Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In steer-by-wire (SBW) steering systems, there is a challenge in diagnosing and correcting alignment errors between the upper steer-side system and the lower wheel-side system, which can lead to steering angle misalignment and affect vehicle control.
Innovation Solution
A steering angle diagnosis and correction apparatus that includes a sensor unit to detect alignment errors and one or more processors to diagnose and correct these errors in real time by adjusting the steerable range and shifting alignment positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a steer-by-wire steering system is implemented to eliminate mechanical connections, then vehicle control flexibility and driving convenience are improved, but steering angle alignment accuracy between upper and lower systems deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where sensors continuously monitor steering angles from multiple sources (steering angle sensor, gyro sensor, wheel angle sensor) and the ECU compares these readings to detect alignment errors between the upper steer-side system and lower wheel-side system. The system provides real-time feedback to maintain steering angle accuracy despite the wireless connection.
Solution Approach 2:
The patent replaces the traditional mechanical connection between steering wheel and wheels with an electronic control system using sensors and actuators. This substitution enables wireless communication while requiring new methods (sensor-based detection and electronic correction) to maintain steering angle alignment accuracy.
2Difficulty of detecting and measuring
If sensor-based detection is used to diagnose steering angle alignment errors, then diagnosis capability is improved, but system complexity increases
Solution Approach 1:
The patent employs multi-functional sensors that serve multiple purposes: the steering angle sensor detects steering input, the gyro sensor detects vehicle attitude, and the wheel angle sensor detects actual wheel position. These sensors collectively diagnose alignment errors while also contributing to overall vehicle control functions, reducing the need for dedicated diagnostic hardware.
Solution Approach 2:
The ECU acts as an intermediary that receives data from multiple sensors, processes this information to diagnose alignment errors, and coordinates correction actions. This central processing unit simplifies the system architecture by consolidating diagnostic logic in one location rather than requiring distributed diagnostic capabilities across multiple components.
Data Source
AI summary
A steering angle diagnosis and correction apparatus and method in a steer-by-wire (SBW) steering system including a sensor unit configured to detect information for diagnosing a steering angle alignment error between a steer-side upper system and a wheel-side lower system in the SBW steering system through a plurality of sensors provided in the upper and lower systems, and a plurality of processors configured to execute one or more instructions to diagnose the steering angle alignment error between the steer-side upper system and wheel-side lower system on a basis of the information detected by the sensor unit and correct the steering angle alignment error in real time.