Transverse Stabilization Control Using a Safe Setpoint Direction
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Solution Overview
Problem
Conventional transverse stabilization systems in vehicles rely solely on the steering direction, which can lead to unsafe stabilization interventions if the driver or assistance system steers the vehicle into an unsafe direction.
Innovation Solution
The method incorporates a safe setpoint direction in addition to the steering direction to determine the transverse stabilization target, thereby preventing the system from contributing to unsafe vehicle movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transverse stabilization system uses only the steering direction as the stabilization target, then the system response is simple and fast, but the vehicle may be stabilized in an unsafe direction causing accidents
Solution Approach 1:
The patent introduces an intermediary component (the setpoint direction calculation unit) that processes the relationship between steering direction and road geometry. This intermediary calculates a safe setpoint direction by considering the road boundary and obstacle information, acting as a mediator between the driver's steering input and the stabilization system's actual target, thereby ensuring safety without requiring complete system redesign
Solution Approach 2:
The system implements feedback by continuously monitoring the steering direction and comparing it with the calculated setpoint direction derived from road geometry and obstacle data. When deviations are detected, the stabilization system uses this feedback information to adjust the stabilization target, creating a closed-loop control that enhances safety while maintaining operational simplicity
2Reliability
If the transverse stabilization system calculates a setpoint direction based on road geometry and obstacles, then the stabilization safety is improved, but the calculation complexity and processing time increase
Solution Approach 1:
The system performs preliminary calculations of the setpoint direction based on pre-acquired road geometry and obstacle data before stabilization interventions are needed. By pre-processing the environmental information and establishing the relationship between steering input and safe trajectory in advance, the system reduces real-time computational burden while maintaining high safety standards
Solution Approach 2:
The stabilization target determination is made dynamic by adapting the calculation complexity based on the driving situation. The system dynamically adjusts the level of detail in setpoint direction calculation according to the urgency and severity of the stabilization need, optimizing the balance between processing time and safety assurance
3Reliability
If the transverse stabilization system overrides the steering direction with a calculated setpoint direction, then the vehicle is prevented from moving in unsafe directions, but the driver's steering control is reduced
Solution Approach 1:
The system applies preliminary anti-action by preparing the setpoint direction calculation based on road geometry and obstacle information before any unsafe steering occurs. This pre-established safety framework allows the system to gently guide the vehicle back to the safe trajectory through calculated stabilization moments rather than forceful override, maintaining driver control while preventing unsafe movements
Solution Approach 2:
The stabilization system applies partial action by intervening only in the degree necessary to return the vehicle to the safe setpoint direction rather than completely overriding the driver's steering input. The stabilization moment is calculated as a corrective component that works alongside the driver's steering, providing just enough intervention to ensure safety while preserving driver autonomy
Data Source
AI summary
A method for operating a transverse stabilization system of a vehicle. A steering direction of the vehicle and a setpoint direction of the vehicle are read in, with a transverse stabilization target for the transverse stabilization system being determined using the steering direction and the setpoint direction.