Vehicle Driving Control Apparatus Discontinuous Relative Speed Correction
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Solution Overview
Problem
Existing vehicle driving control systems experience acceleration and deceleration shocks when the relative speed between the target vehicle and the own vehicle changes discontinuously, leading to reduced driveability due to sudden changes in speed.
Innovation Solution
A vehicle driving control apparatus that acquires the actual relative speed, detects events causing discontinuous changes, and corrects the tracking relative speed to gradually increase its absolute value, setting target acceleration based on the corrected relative speed to smooth acceleration or deceleration, thereby reducing shocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the tracking control uses the actual relative speed directly to set the target acceleration, then the tracking control responds quickly to changes in relative speed, but acceleration shock occurs when the relative speed changes discontinuously
Solution Approach 1:
The system detects events that cause discontinuous relative speed changes in advance and corrects the tracking relative speed before the acceleration shock occurs. By identifying events such as target vehicle replacement or driver acceleration/deceleration operations beforehand, the system can gradually adjust the tracking relative speed from zero, preventing sudden acceleration shocks while maintaining responsive tracking control.
2Ease of operation
If the tracking relative speed is corrected to reduce acceleration shock, then the driveability is improved, but the tracking control becomes less responsive to actual relative speed changes
Solution Approach 1:
The system dynamically adjusts the tracking relative speed based on the detected event type and current vehicle state. When an event causing discontinuous relative speed change is detected, the system gradually increases the tracking relative speed from zero rather than using a fixed correction method. This dynamic adjustment maintains driveability while preserving responsiveness to actual relative speed changes.
Solution Approach 2:
The system continuously monitors the actual relative speed, detects events causing discontinuous changes, and provides feedback to correct the tracking relative speed. This closed-loop feedback mechanism ensures that the tracking control remains responsive to actual relative speed changes while preventing acceleration shocks through appropriate corrections.
Data Source
AI summary
A vehicle driving control apparatus is provided for controlling an own vehicle to track a target vehicle. The vehicle driving control apparatus includes: (1) means for acquiring an actual relative speed of the target vehicle to the own vehicle; (2) means for detecting occurrence of an event which causes the actual relative speed to discontinuously change; (3) means for setting a target acceleration of the own vehicle based on the product of a relative speed gain and a tracking relative speed when the own vehicle tracks the target vehicle, the tracking relative speed being normally set to the actual relative speed; and (4) means for correcting, upon detection of occurrence of the event by the detecting means, the tracking relative speed so as to gradually increase the absolute value of the tracking relative speed from a value that is less than the absolute value of the actual relative speed.