Vehicle Reversing Control Unit Trajectory Correction
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Solution Overview
Problem
Existing reversing assistance systems for vehicles are limited in availability as they typically abort when the driver reverses at too high a speed, causing the vehicle to deviate from the specified trajectory and rendering the system unavailable for further reversing.
Innovation Solution
A control unit that determines reference data for a forward drive trajectory, allowing for the calculation of a reversing trajectory and automatic steering adjustments, while enabling the driver to control longitudinal movement, and includes features to detect deviations from the trajectory, guiding the vehicle back onto the path using a second forward drive to a reverse position, allowing continued assistance even if the driver deviates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the driver reverses at high speed, then the reversing operation is completed faster, but the vehicle deviates from the specified trajectory and the system aborts
Solution Approach 1:
The system dynamically adjusts the reversing trajectory in real-time based on the actual vehicle position and speed. Instead of rigidly enforcing a pre-calculated trajectory, the control unit continuously adapts the trajectory to accommodate varying driving speeds, allowing the system to remain reliable even when the driver reverses faster than expected.
Solution Approach 2:
The system implements continuous feedback by monitoring the vehicle's actual position during reversing and comparing it with the target trajectory. When deviations are detected, the control unit calculates corrective steering interventions to guide the vehicle back onto the trajectory, ensuring system availability is maintained regardless of driving speed.
2Manufacturing precision
If the system strictly enforces trajectory adherence, then the reversing precision is improved, but the system aborts when deviations occur reducing availability
Solution Approach 1:
The trajectory enforcement is made dynamic rather than static. The system continuously recalculates the reference trajectory based on the vehicle's current state, allowing adaptive trajectory adherence that maintains precision while accommodating real-world variations in driving behavior and speed.
Solution Approach 2:
The system incorporates a tolerance threshold for trajectory deviations before triggering an abort. This cushioning mechanism allows minor deviations to occur without system termination, providing a buffer that maintains system availability while still ensuring adequate trajectory adherence for safe reversing operations.
3Object-affected harmful factors
If the system aborts when trajectory deviation occurs, then the safety is improved by preventing incorrect reversing, but the system becomes unavailable for further reversing
Solution Approach 1:
Continuous feedback monitoring allows the system to detect and correct trajectory deviations in real-time through steering interventions, rather than waiting for large deviations that would trigger an abort. This proactive correction maintains safety while preserving system availability.
Solution Approach 2:
The system performs preliminary corrective steering actions when minor deviations are detected, preventing them from growing into dangerous off-course conditions. By addressing deviations early through corrective maneuvers, the system maintains safety without needing to abort the reversing operation.
Data Source
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AI summary
The invention relates to a control unit for a reverse parking assistance system of a vehicle. The control unit is designed to determine a reverse travel trajectory for a reverse travel from an end position to a start position based on reference data relating to a first forward travel of the vehicle. Furthermore, the control unit is designed to control a steering device of the vehicle during the reverse travel of the vehicle as a function of the reverse travel trajectory. In addition, the control unit is designed to detect that the vehicle leaves the reverse travel trajectory on the reverse travel. Furthermore, the control unit is designed to bring about, as a reaction thereto, that in a second forward travel, the vehicle is guided to a reverse travel position, which makes it possible to guide the vehicle again along at least one section of the reverse travel trajectory to the start position.