Blind Spot Vehicle Control With Dual-Stage Deceleration
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Solution Overview
Problem
Existing vehicle control systems may experience rapid deceleration and deteriorated ride quality when the estimated risk level of a blind spot is incorrect, leading to mismatches between predicted and actual moving bodies.
Innovation Solution
A vehicle control device with dual deceleration means, including a blind spot area detecting unit and a blind spot object estimating unit, reduces speed using a first deceleration means and applies a second deceleration when the detected moving body type differs from the estimated, to avoid rapid deceleration and maintain ride quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle control system uses a single deceleration means based on risk level estimation, then the collision avoidance capability is improved, but the ride quality deteriorates when the estimation is incorrect
Solution Approach 1:
The deceleration means is divided into two distinct segments: first deceleration means for gentle speed reduction and second deceleration means for rapid deceleration. This segmentation allows the system to select appropriate deceleration intensity based on whether the actual moving body type matches the estimated type, thereby resolving the contradiction between collision avoidance capability and ride quality.
Solution Approach 2:
The system dynamically switches between different deceleration means based on real-time comparison between estimated and detected moving body types. When types match, the first deceleration means is used for smooth operation; when types mismatch, the second deceleration means is activated for safety, making the deceleration strategy adaptive and context-dependent.
2Productivity
If the vehicle travels at standard speed through blind spot areas, then the productivity is improved, but the safety risk increases when a moving body is hidden in the blind spot
Solution Approach 1:
The system performs preliminary estimation of the moving body type hidden in the blind spot area before the vehicle reaches it. Based on this preliminary estimation, the system pre-adjusts the speed using the first deceleration means, allowing the vehicle to maintain higher speed when estimation is accurate while being prepared to switch to rapid deceleration if the actual moving body type differs from estimation.
3Reliability
If the vehicle decelerates rapidly to cope with incorrect risk level estimation, then the collision avoidance capability is improved, but the ride quality deteriorates
Solution Approach 1:
The system continuously compares the detected moving body type with the estimated moving body type and provides feedback to the control unit. This feedback mechanism enables the system to determine whether to apply the first or second deceleration means, ensuring rapid deceleration is only used when necessary (when types mismatch) rather than continuously, thus maintaining ride quality while preserving collision avoidance capability.
Data Source
AI summary
A vehicle control device that autonomously controls a vehicle so as not to cause rapid deceleration that leads to a deterioration in ride quality. The vehicle control device controls first and second deceleration, means that reduce a speed at a deceleration rate large than a deceleration rate of the first deceleration means. The vehicle control device includes a blind spot area detecting unit that detects a blind spot area of a sensor that recognizes an external environment, and a blind spot object estimating unit that estimates a blind spot object that is a virtual moving body hidden in the blind spot area. When a vehicle approaches the blind spot area at a speed reduced by the first deceleration means, the vehicle is decelerated by the second deceleration means when a type of a moving body detected by the sensor is different from a type of the blind spot object.