Lateral Collision Avoidance Steering for Forward Object Evasion
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Solution Overview
Problem
Existing autonomous driving systems and driver assistance systems, such as AEB, FVCMS, and PDCMS, do not adequately consider the level of risk or possibility of collision when avoiding forward objects, often relying solely on braking without considering the need for steering manipulation.
Innovation Solution
A lateral movement system that includes sensors to detect forward objects, a processor to judge the operation condition based on various criteria, and an actuator to execute lateral movement, allowing collision avoidance through steering alone when the risk is low, with conditions including overtaking space, vehicle speed, and lateral object speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If autonomous driving systems rely solely on braking for collision avoidance, then the system complexity is reduced, but the effectiveness of collision avoidance deteriorates when steering manipulation is needed
Solution Approach 1:
The system dynamically selects between braking-only mode and steering-inclusive mode based on real-time assessment of collision risk conditions. When the object is detected in the forward direction within the field of view and collision conditions are met, the system activates steering manipulation; otherwise, it uses braking alone, making the system adaptable to different scenarios
Solution Approach 2:
The system changes the control parameters by introducing steering angle as an additional variable when collision conditions are satisfied. The control unit determines steering manipulation based on the position of the detected object relative to the vehicle's forward direction, transforming the single-parameter braking control into a multi-parameter steering and braking coordination control
2Reliability
If the system performs lateral movement to avoid collision, then collision avoidance capability is improved, but the risk of lane deviation or secondary collisions increases
Solution Approach 1:
The system performs preliminary assessment of the lateral movement path by detecting the position of the object relative to the vehicle's forward direction and calculating the required steering angle. The control unit evaluates whether the planned lateral movement will cause lane deviation or secondary collisions before executing the maneuver, preventing harmful outcomes in advance
Solution Approach 2:
The system continuously monitors the relative position of the detected object and adjusts the steering manipulation in real-time. The control unit receives feedback from the sensor about object position and modifies the steering angle accordingly, ensuring the vehicle avoids the object while maintaining proper lane positioning and preventing secondary collisions
3Reliability
If the system uses steering manipulation for collision avoidance, then the effectiveness of avoiding forward objects is improved, but the system complexity increases
Solution Approach 1:
The control unit serves multiple functions: it processes sensor data, determines collision conditions, calculates steering angles, and executes both steering and braking controls. This multi-functional design consolidates the system complexity into a single control unit rather than requiring separate dedicated systems for each function
Data Source
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AI summary
The present disclosure relates to an autonomous vehicle system or a driver assistance system that detects an object in front of the vehicle, judges whether a condition calls for an operation of a lateral movement system for collision avoidance, determines a direction of the lateral movement, and executes the lateral movement.