Steering Information Detection Using Redundant Sensors
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Solution Overview
Problem
Existing electric power steering (EPS) systems fail to calculate steering torque and angle when failures occur in sensors, leading to degraded vehicle stability and safety, especially in autonomous vehicles where complete steering control termination is a concern.
Innovation Solution
The implementation of multiple torque sensors and rotation angle sensors, along with synchronization checkers, allows for the calculation of steering information even when some sensors fail by determining synchronized output values and excluding faulty sensor outputs, ensuring normal steering control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple torque sensors and rotation angle sensors are provided, then steering information can be calculated even upon sensor failure, but device complexity increases
Solution Approach 1:
The system divides the sensor array into functional groups (torque sensors and rotation angle sensors) with dedicated synchronization checkers for each type, allowing independent monitoring and failure isolation of specific sensor segments without affecting the entire system
Solution Approach 2:
Synchronization checkers continuously monitor sensor output values before they are used for steering calculation, identifying and excluding faulty sensor data in advance to prevent calculation errors and maintain reliable steering control
2Measurement precision
If synchronization checking is implemented to determine valid sensor outputs, then accurate steering information can be obtained, but calculation complexity increases
Solution Approach 1:
The system checks synchronization of all sensor outputs but only incorporates synchronized (valid) ones into the steering calculation, using a subset of fully verified data rather than attempting to process all sensor inputs equally
Solution Approach 2:
Faulty or non-synchronized sensor outputs are identified and extracted/excluded from the calculation process, ensuring that only validated synchronized sensor data contributes to the final steering information
Data Source
AI summary
Provided is an apparatus and method for detecting steering information in which a plurality of torque sensors and sensors for sensing a rotation angle of a steering shaft are provided and thus it is possible to calculate steering information, such as a steering torque, a steering angle, etc., even upon occurrence of failure in some sensors. A plurality of torque sensors and absolute angle sensors (rotation angle sensors) are provided, and after it is determined whether an output value of each sensor is synchronized, a torque and a steering angle are calculated accordingly. Therefore, even upon occurrence of failure in some sensors, it is possible to calculate a torque and a steering angle normally, and thus steering control is possible.