Automatic Steering Correction for Parking Path Deviation
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Solution Overview
Problem
Existing automatic vehicle control systems face challenges in precisely maintaining the target steering wheel angle during parking, leading to deviations from the predetermined parking path, which can result in incomplete parking or collisions, due to imprecise electronic steering and influences from aging processes, manufacturing tolerances, and environmental factors.
Innovation Solution
A device and method that determine a correction factor to adjust the target steering wheel angle, compensating for deviations caused by electronic steering and environmental conditions, ensuring the vehicle adheres to the desired path by continuously adapting to the current status of components and conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automatic steering is used to maintain target steering wheel angle, then parking automation is improved, but steering precision deteriorates due to electronic steering inaccuracies and environmental factors
Solution Approach 1:
The system continuously compares the actual steering wheel angle with the target steering wheel angle and automatically adjusts the steering to compensate for deviations. This closed-loop feedback mechanism ensures that despite electronic steering inaccuracies and environmental factors, the vehicle maintains precise alignment with the parking path throughout the automated parking process.
2Ease of operation
If electronic steering is used for automatic parking, then ease of operation is improved, but reliability deteriorates due to deviations from target path
Solution Approach 1:
The system pre-calculates the target parking path and target steering wheel angles before executing the automated parking maneuver. By having the complete trajectory and control parameters prepared in advance, the system can reliably guide the vehicle through the parking sequence without real-time decision delays, ensuring consistent and reliable path adherence.
Solution Approach 2:
The system continuously monitors the actual steering wheel angle and vehicle position, comparing it against the pre-calculated target path. When deviations are detected, the system automatically adjusts the steering to correct the trajectory, ensuring reliable completion of the parking maneuver despite electronic steering variations.
3Measurement precision
If target steering wheel angle is strictly maintained, then parking precision is improved, but adaptability deteriorates due to component aging and environmental conditions
Solution Approach 1:
The system dynamically adjusts the target steering wheel angle based on real-time feedback from actual steering measurements and environmental conditions. Rather than maintaining a fixed target angle, the system adapts the target values to account for component aging, temperature variations, and other environmental factors, ensuring both precision and adaptability throughout the vehicle's operational life.
Data Source
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AI summary
The invention relates to a device (50) for controlling an automatic steering system (62) of a vehicle, comprising a signal input (58a) which receives a target direction of travel specified by an automatic vehicle control system (52, 54), a storage device (58b) on which a correction factor is stored, a control unit (58) which determines a corrected target direction of travel based on the correction factor and the specified target direction of travel and switches the automatic steering system (62) into a mode for maintaining the corrected target direction of travel, an evaluation unit (72) which receives an actual direction of travel determined by a sensor (64, 66) of the vehicle and compares it with the specified target direction of travel, and, if the actual direction of travel deviates from the specified target direction of travel by at least a minimum difference,The correction factor is redefined according to the comparison and stored on the storage device (58b). Furthermore, the invention relates to a corresponding method for controlling an automatic steering system (62) of a vehicle and to a device and a method for verifying the feasibility of a predetermined target direction of travel for a vehicle.