Lane Keeping System Dynamic Torque Adaptation
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Solution Overview
Problem
Existing lane keeping systems for motor vehicles do not differentiate steering torque based on the structural environment, failing to account for lane delimiters other than markings, such as curbs or concrete walls, which can lead to inadequate support in various driving scenarios.
Innovation Solution
A lane keeping system that detects road edges, lane markings, and structural boundaries, dynamically adjusts steering torque based on predicted distances from these features, using imaging sensors and vehicle trajectory analysis to provide differentiated environmental awareness, adapting intervention distances and torque strength accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lane keeping system uses a fixed threshold value for steering torque intervention, then the system is simple to implement, but it cannot adapt to different environmental situations such as construction sites with structural boundaries versus normal roadways with lane markings
Solution Approach 1:
The patent implements dynamic adaptation of the threshold value based on environmental detection. The control device determines different threshold values for steering torque intervention depending on whether the vehicle is on a normal roadway with lane markings or in a construction site area with structural boundaries. This dynamic adjustment allows the system to adapt to varying environmental conditions while maintaining manageable complexity through context-based parameter modification.
Solution Approach 2:
The system changes the threshold parameter for steering torque intervention based on the detected environmental situation. When structural boundaries are detected in the lane keeping system's field of view, the threshold is adjusted to account for the different spatial constraints and safety requirements compared to normal roadway conditions. This parameter adaptation enables versatile performance across different driving environments.
2Reliability
If the lane keeping system detects and responds to all types of boundary objects, then it provides comprehensive safety coverage, but it increases the complexity of object detection and classification
Solution Approach 1:
The patent segments the detection task by focusing on specific types of boundary objects relevant to lane keeping. The lane detection system identifies and categorizes objects such as lane markings, curbs, crash barriers, and concrete walls. By segmenting the detection space and object types, the system achieves comprehensive safety coverage for all critical boundaries while managing detection complexity through targeted classification of relevant objects.
3Productivity
If the intervention distance is fixed, then the control logic is simple, but it cannot dynamically adjust to the vehicle's predicted trajectory and upcoming boundary conditions
Solution Approach 1:
The patent implements preliminary action by determining the vehicle's predicted trajectory in advance and identifying boundary objects along this future path. The control device uses the predicted trajectory to proactively adjust the intervention distance threshold before the vehicle actually reaches the boundary condition. This allows the system to prepare appropriate steering torque interventions in advance, improving response efficiency while the complexity is managed through predictive modeling rather than reactive complexity.
Data Source
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AI summary
The invention relates to a lane keeping system for a motor vehicle, comprising: a lane detection system for detecting and determining the lane in front of the vehicle, a vehicle position determination system for determining the vehicle trajectory by means of a motion variable of the vehicle, a control device for producing a steering torque that acts on the steering system of the motor vehicle for the purpose of lane keeping. According to the invention, the lane detection system is designed to detect roadway edge and lane markings, roadway edges and objects; the control device produces forecast points on the vehicle trajectory and determines threshold values according to the objects specifying the surroundings situation in the vicinity of the forecast points in regard to roadway edge and lane markings, roadway edges and objects; and the control device determines a predicted distance, which indicates the distance of the vehicle at the forecast point on the vehicle trajectory from the object specifying the surroundings situation at the forecast point. The invention relates to a lane keeping system for a motor vehicle, comprising: a lane detection system for detecting and determining the lane in front of the vehicle, a vehicle position determination system for determining the vehicle trajectory by means of a motion variable of the vehicle, a control device for producing a steering torque that acts on the steering system of the motor vehicle for the purpose of lane keeping. According to the invention, the lane detection system is designed to detect roadway edge and lane markings, roadway edges, objects, in particular structural boundaries in the vicinity of the roadway edge and/or of the lane edge, and vehicles in adjacent lanes of the lane in which the vehicle is driving; the control device produces forecast points on the vehicle trajectory and determines threshold values according to the objects specifying the surroundings situation in the vicinity of the forecast points in regard to roadway edge and lane markings, roadway edges, objects, in particular structural boundaries in the vicinity of the roadway edge and/or of the lane edge, and vehicles in adjacent lanes of the lane in which the vehicle is driving; the control device reduces or increases the threshold according to the predicted distance in order to produce an engagement distance; and if the lateral distance of the vehicle from the object specifying the surroundings situation falls below the engagement distance, a steering torque is applied to the steering system, wherein the engagement magnitude depends on the lateral distance of the vehicle from the object specifying the surroundings situation.