Vehicle Deceleration Control Visibility Error Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle deceleration control systems face challenges in avoiding rapid deceleration when recognizing a rearmost vehicle in congestion on curved roads or areas with poor visibility, leading to potential collisions due to errors in position information from external sources.
Innovation Solution
A vehicle traveling control apparatus with dual deceleration control units that utilize autonomous sensors and external communication to calculate and adjust deceleration targets based on visibility distances and estimation errors, switching between primary and secondary deceleration controls to ensure safe stopping without rapid deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deceleration control is performed based on external communication information when the rearmost vehicle cannot be recognized from a long distance, then the own vehicle can maintain a predetermined inter-vehicle distance, but rapid deceleration occurs due to position information errors
Solution Approach 1:
The system merges data from multiple information sources (external communication information and autonomous sensor detection) to determine the final deceleration control strategy. When external communication provides rearmost vehicle position, it is cross-verified with autonomous sensor data to confirm vehicle presence and validate position accuracy before executing deceleration control.
Solution Approach 2:
The system implements feedback by continuously monitoring whether the rearmost vehicle is actually detected by autonomous sensors after initiating deceleration control based on external communication. If the vehicle is not detected within expected parameters, the system adjusts or cancels the deceleration control to prevent unnecessary rapid deceleration caused by erroneous position information.
2Reliability
If dual deceleration control units are implemented to verify vehicle presence, then rapid deceleration is prevented, but device complexity increases
Solution Approach 1:
The system dynamically switches between first deceleration control (based on external communication) and second deceleration control (based on autonomous sensor detection) depending on detection results. The control strategy is not fixed but adapts in real-time based on whether the rearmost vehicle is confirmed by autonomous sensors, optimizing the balance between reliability and complexity.
Solution Approach 2:
The deceleration control function is segmented into two distinct control units: first deceleration control that operates when only external communication information is available, and second deceleration control that operates when autonomous sensor detection confirms vehicle presence. This segmentation allows each unit to be optimized for its specific detection scenario while working together to improve overall reliability.
Data Source
AI summary
A vehicle traveling control apparatus includes a first traveling environment recognition unit using an onboard sensor, a second traveling environment recognition unit using external information, a visibility distance calculating unit, a first deceleration control unit, a second deceleration control unit, and a start timing changing unit. When a sum of an estimation error of a distance set in the second traveling environment recognition unit and a visibility distance is larger than a distance to a rearmost vehicle under congestion recognized by the second traveling environment recognition unit, the start timing changing unit calculates a deceleration required distance necessary until deceleration control is taken over from second deceleration control by the second deceleration control unit, to first deceleration control by the first deceleration control unit, and start the second deceleration control from a distance longer than a second control target distance at a timing considering the deceleration required distance.