Vehicular Control Object Determination via Swing Rate Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicular control systems face issues with erroneous determination of control objects due to degraded reliability of future travel locus estimation, particularly when lane changes occur, leading to potential misidentification of preceding vehicles and inconvenience to drivers.
Innovation Solution
A vehicular control object determination system that includes an object detector, travel locus estimator, control object determiner, swing rate detector, and comparator, which modifies control object determination conditions based on detected swing rates and lane changes to prevent erroneous object determination by adjusting thresholds and timing for determining control objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the travel locus is shifted parallel by an amount corresponding to the width of the lane when lane change is detected, then tracking control can be resumed after lane change, but erroneous determination of control object may occur when the preceding vehicle is far away
Solution Approach 1:
The system dynamically adjusts the travel locus estimation method based on vehicle behavior. When lane change is detected, it temporarily suspends parallel shifting of the travel locus and instead uses direct re-estimation, allowing the control object determination to adapt to the changing spatial relationship between vehicles during lane transition
Solution Approach 2:
The system changes the parameter of travel locus estimation by switching between parallel shifting mode (for normal lane changes) and direct re-estimation mode (when reliability is degraded), thereby adjusting the determination criteria according to the specific operational context to maintain accuracy
2Reliability
If tracking control is stopped or temporarily suspended when lane change is detected, then erroneous determination can be avoided, but convenience deteriorates as control is not resumed until driver operates switch
Solution Approach 1:
The system automatically detects lane changes using vehicle behavior data and autonomously adjusts control object determination, eliminating the need for driver intervention via switch operation. The system serves itself by monitoring its own operational state and making appropriate control adjustments
Solution Approach 2:
The system uses feedback from vehicle behavior detection (lane change detection) to automatically adjust the control object determination process, creating a closed-loop system that responds to changing conditions without requiring external driver input, thus maintaining both reliability and convenience
3Measurement precision
If the future travel locus estimation reliability is degraded, then the system may misidentify preceding vehicles as control objects, but maintaining strict determination conditions may cause loss of distant valid control objects
Solution Approach 1:
The system dynamically adjusts determination conditions based on the detected swing rate. When swing rate is high (indicating degraded estimation reliability), it applies stricter determination conditions; when swing rate is low (indicating high reliability), it uses more lenient conditions, thereby optimizing the balance between precision and detection capability across different operational states
Data Source
AI summary
A vehicular control object determination system includes: a radar device for detecting an object that is present in the direction of travel of a vehicle; a travel locus estimator for estimating a future travel locus of the vehicle; a control object determiner for determining a control object based on a detection result obtained by the radar device, a future travel locus of the vehicle estimated by the travel locus estimator based on a vehicle speed and a yaw rate and predetermined control object determination conditions; and a swing rate detector for detecting a swing rate of side-to-side swing of the estimated travel locus. When the detected swing rate is equal to or greater than a threshold value, the control object determiner excludes from determination of a control object an object that is further than a predetermined distance. Therefore, when the swing rate is large and the estimation accuracy is lowered, an object that is farther than a predetermined distance is excluded from determination of a control object, thereby avoiding erroneous determination of a control object.