Vehicle Control Device Acceleration Weight Adjustment
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Solution Overview
Problem
Existing vehicle control devices fail to adequately reflect the acceleration of both the self vehicle and surrounding objects in determining the timing for alarm output, leading to inappropriate alarm responses.
Innovation Solution
A vehicle control device that calculates a control value based on the acceleration of the self vehicle and surrounding objects, adjusting weight coefficients to prioritize the acceleration of the leading vehicle when the self vehicle is accelerating and prioritizing the relative acceleration when the self vehicle is decelerating, to determine the appropriate timing for drive assist operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the control value is calculated based on relative acceleration between self vehicle and leading vehicle, then the alarm output timing reflects the relative motion state, but it fails to independently reflect the acceleration of the self vehicle and the leading vehicle, leading to inappropriate alarm responses
Solution Approach 1:
The patent segments the acceleration-related value into two independent components: the acceleration of the self vehicle and the acceleration of the leading vehicle. By calculating and adjusting these accelerations separately through different weight coefficients, the system can independently reflect each vehicle's acceleration state in the alarm output timing determination, resolving the contradiction between relative motion reflection and independent acceleration reflection.
2Ease of operation
If the alarm is triggered based on inter-vehicular distance and relative velocity only, then the system is simple to operate, but it produces false alarms when the self vehicle is accelerating
Solution Approach 1:
The patent performs preliminary calculation and adjustment of acceleration-related values before determining the alarm output timing. By pre-calculating the acceleration of the self vehicle and the leading vehicle separately, and adjusting their weight coefficients in advance, the system eliminates false alarms caused by self vehicle acceleration while maintaining simple operation. The alarm determination process remains straightforward, but now incorporates pre-processed acceleration data to improve reliability.
Data Source
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Figure 3A~3B
AI summary
A vehicle control device 100 for starting a drive assist in accordance with relative positional relationship between a self vehicle and an object around the self vehicle, comprises a control value calculating part (10) which calculates a control value (CV) based on an inter-vehicular distance between the self vehicle and the object, a velocity of the self vehicle, a relative velocity of the object to the self vehicle, and an acceleration-related value (Ax) obtained based on at least one of an acceleration (Am) of the self vehicle and an acceleration (Ap) of the object; an acceleration-related value adjusting part (11) which adjusts the Ax by changing a degree of contribution of at least one of the Am and the Ap in the Ax in accordance with the Am; and a drive assist start judging part (12) which starts the drive assist if the CV is greater than a threshold value.