Steer-by-Wire Maneuvering Assistance for Trajectory Correction
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Solution Overview
Problem
Existing steer-by-wire steering systems lack the ability to assist drivers in manual maneuvering by correcting unsuitable steering angles and environmental conditions, leading to potential collisions and suboptimal parking, without overriding the driver's intended trajectory.
Innovation Solution
A maneuvering assistance function that uses a processing unit to recognize steering patterns and environmental conditions, correcting the vehicle's trajectory to align with the driver's intended path, preventing collisions and optimizing parking, while allowing manual control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If steer-by-wire steering systems are used for manual maneuvering, then the vehicle can be controlled by the driver, but the system cannot automatically correct unsuitable steering angles or assist the driver during manual maneuvering
Solution Approach 1:
The system continuously monitors the actual vehicle trajectory during manual maneuvering and compares it with the target trajectory. When deviations exceed a tolerance range, the maneuvering assistance function automatically activates to correct the trajectory, providing feedback-based control assistance while maintaining manual operation capability.
Solution Approach 2:
The maneuvering assistance function acts as an intermediary between the driver's steering input and the vehicle's actual trajectory. It processes the driver's steering specifications, environmental conditions, and actual trajectory data to generate corrective steering interventions that assist the driver without taking full control.
2Reliability
If the system activates automatic correction functions, then trajectory accuracy improves, but the driver's intended trajectory may be overridden
Solution Approach 1:
The system applies partial correction by only intervening when the actual trajectory deviation exceeds a predefined tolerance range. The correction strength is modulated to assist rather than override, applying just enough steering intervention to bring the vehicle back toward the target trajectory while respecting the driver's intended path.
Solution Approach 2:
The level of automatic correction is dynamically adjusted based on the magnitude of trajectory deviation and environmental conditions. The system transitions smoothly between manual-only control and assisted control modes, with the assistance intensity adapting to the situation rather than applying fixed correction.
3Reliability
If environmental sensors and trajectory monitoring are continuously active, then collision prevention and parking optimization improve, but system complexity and energy consumption increase
Solution Approach 1:
The system performs preliminary assessment of environmental conditions and trajectory predictions before actual maneuvering occurs. By pre-evaluating potential collision risks and parking space suitability using environmental sensors, the system can proactively adjust the target trajectory or alert the driver, reducing the need for complex real-time intervention during critical moments.
Data Source
AI summary
A method is proposed for maneuvering a vehicle. The vehicle has a steer-by-wire steering system having a steering handle and a steering gear actuator for changing a travel direction of the vehicle. In a manual driving operating state, a maneuvering process is detected based on a steering specification at the steering handle and a vehicle velocity. A target vehicle trajectory correlated with a driver intention for the maneuvering process is ascertained or predicted based on the steering specification at the steering handle and an environmental condition. An actual vehicle trajectory is progressively compared during the maneuvering process to the target vehicle trajectory. The actual vehicle trajectory is corrected in the event of a deviation from the target vehicle trajectory by means of a maneuvering assistance function and by an assisting intervention of the maneuvering assistance function in a lateral control of the vehicle.