Driving Assist Apparatus Obstacle Avoidance Timing
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Solution Overview
Problem
Existing driving assisting apparatuses face challenges in reducing driver discomfort by effectively determining the optimal intervention timing for obstacle avoidance, as they fail to consider the complex situations involving vehicle positions, speeds, and directions, leading to excessive intervention.
Innovation Solution
A driving assisting apparatus that includes an obstacle detecting unit, a course calculating unit, a determination unit, and an intervention control executing unit, which calculate and determine the overlap of intervention control courses with obstacle regions, allowing for pre- or post-intervention control based on the number of non-overlapping courses to minimize driver discomfort while ensuring reliable obstacle avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intervention control is executed before driver operation is allowed for a predetermined time (pre-intervention control), then obstacle avoidance reliability is improved, but driver discomfort increases due to excessive intervention
Solution Approach 1:
The system changes the intervention timing parameter dynamically based on the number of non-overlapping intervention control courses. When the number is small (reliable avoidance possible), pre-intervention control is executed. When the number is large (driver operation likely to succeed), intervention is delayed. This parameter adaptation resolves the contradiction by adjusting intervention aggressiveness to match situation complexity.
2Ease of operation
If intervention start timing is delayed to respect driver operation, then driver discomfort is reduced, but obstacle avoidance reliability may be compromised
Solution Approach 1:
The determination unit provides feedback by calculating the number of non-overlapping intervention control courses based on obstacle region and post-intervention control courses. This feedback informs the intervention control executing unit whether to execute pre-intervention or post-intervention control, creating a closed-loop system that adapts intervention timing to actual situation complexity.
3Reliability
If pre-intervention control is executed in all situations, then obstacle avoidance is ensured, but driver discomfort increases due to unnecessary intervention
Solution Approach 1:
Instead of always executing pre-intervention control (excessive action), the system applies partial intervention only when necessary - specifically when the number of non-overlapping intervention control courses is small. When the number is large, the system trusts the driver's operation and delays intervention, avoiding unnecessary interference while maintaining safety when needed.
Data Source
AI summary
There is a driving assisting apparatus capable of reducing a feeling of discomfort of a driver by respecting the driver's operation as much as possible in a range where an obstacle can be reliably avoided by intervention control. An ECU 2 of a driving assisting apparatus 1 includes an obstacle detecting section 22, a control course calculating section 23, a determination section 24, and an intervention control executing section 25. The obstacle detecting section 22 detects an obstacle region around a vehicle. The control course calculating section 23 calculates an intervention control course, which can be taken by the vehicle, when the intervention control is executed after the driver's operation is allowed for a predetermined time. The determination section 24 determines whether the number of intervention control courses, which do not overlap the obstacle region, is equal to or smaller than a predetermined number from the obstacle region transmitted from the obstacle detecting section 22 and the intervention control course transmitted from the control course calculating section 23. The intervention control executing section 25 executes intervention control along the intervention control course when the number of intervention control courses is the predetermined number.