Steering Assistance Sensor Fault Detection Using Estimated Wheel Angle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In redundant sensor systems, it is difficult to identify which sensor has an error when sensing data from multiple sensors differ, leading to potential degradation or stoppage of the overall device function, such as electronic power steering.
Innovation Solution
A method and apparatus that utilize movement information from a vehicle, including speed, yaw rate, and lateral acceleration, to estimate the steering angle of the front-wheel and steering-wheel, compare sensing data with threshold values, and apply a time damper to accurately identify and manage errors in sensors using a Kalman filter and gear ratio conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a redundant system with two unit systems is applied, then robustness against sensor failure is improved, but the ability to identify which sensor has an error deteriorates
Solution Approach 1:
The patent introduces a steering angle estimator as an intermediary that generates reference steering angle data through calculation based on vehicle movement information. This reference data serves as a mediator to compare against actual sensor readings, enabling identification of which sensor has failed without compromising the redundant system structure.
Solution Approach 2:
The system implements feedback by continuously comparing actual sensor readings with estimated reference values. When discrepancies exceed a threshold, the system provides feedback to identify the faulty sensor and switch to using only the healthy sensor, thereby maintaining system reliability while enabling error detection.
2Device complexity
If sensor error identification is not implemented, then system complexity is reduced, but device function degradation or stoppage occurs when sensor error happens
Solution Approach 1:
The patent applies preliminary action by pre-calculating estimated steering angle data using vehicle movement information before sensor failure occurs. This pre-computed reference data is ready for immediate comparison when sensor errors happen, enabling quick identification and response without adding complex real-time processing requirements.
Data Source
AI summary
The disclosure invention relates to a method and apparatus for controlling a steering assistance system, and includes identifying, with an electronic device, movement information according to driving of a vehicle, estimating, with the electronic device, a steering angle of front-wheel for the vehicle based on the movement information and converting the steering angle of front-wheel into a steering angle of steering wheel, identifying, with the electronic device, sensing data obtained from each of a plurality of sensors provided in the vehicle, identifying, with the electronic device, whether the sensors have an error using the sensing data and the steering angle of steering wheel, and controlling, with the electronic device, the steering assistance system of the vehicle based on whether the sensors have the error.