Integrative Blind Spot and Lane Keeping Control for Lateral Stability
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Solution Overview
Problem
The existing blind spot detection system (BSDS) and lane keeping assist system (LKAS) operate separately, leading to rapid changes in vehicle steering and velocity, compromising lateral stability when both systems attempt to control the vehicle simultaneously, causing excessive control that exceeds the road center.
Innovation Solution
An integrative control system that calculates an estimated lateral distance using time-to-collision, velocity, heading angle, yaw-rate, and lane curvature, and coordinates side brake control by the BSDS and steering angle control by the LKAS to maintain vehicle stability, ensuring that side brake control is only applied when the estimated lateral distance exceeds a predetermined value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both BSDS side brake control and LKAS steering control operate simultaneously based on separate driving conditions, then each system achieves its respective purpose, but rapid changes in vehicle steering and velocity occur leading to excessive control that exceeds the road center
Solution Approach 1:
The patent merges the control logic of BSDS and LKAS into a unified system that shares common driving conditions and standards. The integrative control module combines the separate control commands from both systems and processes them together, ensuring coordinated action rather than independent operation. This merging eliminates the conflict between simultaneous side brake control and steering control, preventing rapid changes in vehicle steering and velocity while maintaining the effectiveness of both systems.
Solution Approach 2:
The integrative control module serves as an intermediary between BSDS and LKAS systems. It receives control commands from both systems, evaluates them against unified driving conditions, and generates coordinated control outputs. This intermediary layer ensures that side brake control and steering control are applied in a harmonized manner, preventing excessive control actions that would compromise lateral vehicle stability while still achieving the safety purposes of both systems.
2Adaptability or versatility
If BSDS and LKAS operate based on separate driving conditions or standards, then each system can independently perform its function, but the vehicle control becomes excessive and compromises stable driving
Solution Approach 1:
The integrative control module implements universal driving conditions and standards that apply to both BSDS and LKAS systems simultaneously. Rather than maintaining separate condition sets, the system uses a unified framework that both systems adhere to, enabling them to function independently while operating under common rules. This multi-functional approach allows the system to handle both blind spot detection and lane keeping tasks with a single set of control criteria, ensuring smooth and coordinated vehicle operation.
3Reliability
If side brake control is applied without considering lateral distance, then blind spot collision risk is addressed, but excessive control occurs that exceeds the road center
Solution Approach 1:
The system applies local quality by making side brake control conditional on the estimated lateral distance to the center of the road. Rather than applying side brake control uniformly in all blind spot scenarios, the integrative control module evaluates the specific lateral distance context and applies braking only when appropriate. This localized approach ensures collision avoidance while preventing excessive control actions that would cause the vehicle to exceed the road center, thereby improving control precision.
Data Source
AI summary
An integrative control system and a method for controlling a blind spot detection system (BSDS) and a lane keeping assist system (LKAS) for stable driving of a vehicle are provided, in which, when the vehicle is deviated from its lane and another vehicle is positioned in a blind spot, an estimated lateral distance is calculated using time-to-collision, and side brake control by the ABSD system and steering angle control by the LKAS are performed based on the estimated lateral distance.