Sensor Signal Processing for Steering Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for reliable and redundant sensor signals in electric power steering systems for vehicles, particularly due to the application of autonomous-driving technology, is not adequately met by existing systems, which require improved methods for processing and validating sensor data to ensure accurate steering control.
Innovation Solution
A sensor signal processing apparatus and method that includes a sensor signal test module to perform abnormality tests on multiple sensor signals and a selection module to determine valid main sensor signals, ensuring redundancy and reliability by selecting a primary signal based on normal sensor signals and controlling its output, thereby enhancing steering control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor signals from multiple sensors are used to improve reliability and redundancy, then the reliability and redundancy of sensor signals are improved, but the complexity of signal processing increases
Solution Approach 1:
The patent segments the sensor signal processing into distinct functional modules: a test module that performs abnormality tests on individual sensor signals, a selection module that selects valid signals from tested signals, and a steering control module that uses selected signals. This segmentation allows complex multi-sensor processing to be broken down into manageable, independent stages, improving reliability through systematic validation while keeping each module's complexity controllable.
Solution Approach 2:
The patent applies preliminary action by performing abnormality tests on sensor signals before they are used for steering control. The test module预先 validates each sensor signal to determine its validity, and only signals passing this preliminary test are selected for further processing. This preliminary validation ensures that unreliable signals are filtered out before affecting the steering control, thereby improving overall system reliability.
2Reliability
If abnormality tests are performed on all sensor signals to ensure reliability, then the reliability of sensor signal selection is improved, but the processing time increases
Solution Approach 1:
The patent applies partial action by performing abnormality tests on all sensor signals to ensure comprehensive validation, but then selectively processing only the valid signals identified through testing. The selection module filters out abnormal signals and proceeds with processing only the valid subset, avoiding unnecessary processing time on defective signals while maintaining thorough validation where needed.
3Reliability
If multiple sensor signals are processed to provide redundancy, then the redundancy of sensor system is improved, but the difficulty of detecting and measuring valid signals increases
Solution Approach 1:
The patent implements feedback through the test module that continuously monitors sensor signals and provides validity information back to the selection module. The abnormality test results feed back into the signal selection process, enabling the system to automatically identify and select valid signals from multiple redundant sources. This feedback mechanism simplifies the detection of valid signals by providing clear validity indicators from the test module.
Data Source
AI summary
The present embodiment relates to an apparatus and method for processing a sensor signal and a steering control apparatus. In the sensor signal processing apparatus, an abnormality test is performed on three or more sensor signals (e.g., motor position sensor signals) by a sensor signal test module, and by the sensor signal selection module, a main sensor signal (e.g., a main normal motor position sensor signal) is selected on the basis of normal sensor signals (e.g., normal motor position sensor signals), validity of the selected main sensor signal is determined, and an output of the selected main sensor signal is controlled.