Autonomous Steering Signal Correction via Reference Map
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Solution Overview
Problem
Autonomous vehicles face inaccuracies in steering due to mismatched physical characteristics and steering module distortions, despite correct calculations, leading to potential functional failures.
Innovation Solution
A method using a reference map generated from past driving records to adjust steering signals, incorporating regression operations and similarity scores to accurately deliver steering intentions to the steering apparatus, while alerting drivers to potential breakdowns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the autonomous driving module inputs the correct value to the steering module, then the calculation accuracy is improved, but the steering accuracy deteriorates due to physical characteristic mismatches and module distortions
Solution Approach 1:
The patent introduces a steering angle correction module as an intermediary between the autonomous driving module and the steering module. This mediator receives the steering angle from the autonomous driving module, corrects it based on pre-stored correction values that account for physical characteristic mismatches, and then transmits the corrected angle to the steering module, thereby resolving the contradiction between calculation accuracy and steering accuracy
Solution Approach 2:
The patent changes the steering angle parameter by applying correction values stored in the correction value storage unit. These correction values adjust the original steering angle to compensate for distortions in the steering module's physical characteristics, transforming the parameter to achieve accurate steering despite hardware imperfections
2Measurement precision
If a reference map is generated using past driving records and regression operations, then the steering intention delivery accuracy is improved, but the system complexity increases
Solution Approach 1:
The patent performs preliminary actions by generating a reference map beforehand using past driving records and regression operations. The reference map, which contains corrected steering angle information, is prepared in advance and stored for future use, allowing the system to quickly apply corrections without performing complex real-time calculations during actual steering operations
Solution Approach 2:
The patent creates a copy of steering angle information in the form of a reference map based on historical data. Instead of processing raw past driving records each time, the system uses the pre-generated reference map as a simplified copy that contains the essential correction information needed for accurate steering intention delivery
3Manufacturing precision
If the steering angle is corrected using a reference map and regression operation, then the steering accuracy is improved, but the calculation time increases
Solution Approach 1:
The patent performs the time-consuming regression operations and reference map generation in advance, before actual steering operations are needed. This preliminary action shifts the computational burden to an offline phase, allowing real-time steering corrections to be applied quickly using the pre-computed reference map without adding significant delay to the steering response time
Data Source
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AI summary
A method for delivering a steering intention of an autonomous driving module to a steering apparatus more accurately by using a reference map is provided. And the method includes steps of: (a) a computing device, if a subject intended steering signal inputted by the autonomous driving module at a current timing is acquired, instructing a signal adjustment module to select, by referring to the reference map, specific reference steering guide values corresponding to the subject intended steering signal; (b) the computing device (i) adjusting the subject intended steering signal by referring to the specific reference steering guide values, in order to generate a subject adjusted steering signal, and (ii) transmitting the subject adjusted steering signal to the steering apparatus, to thereby support the steering apparatus to rotate the subject vehicle by a specific steering angle corresponding to the subject intended steering signal.