Vehicle Control Apparatus Using Perceived Relative Distance
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Solution Overview
Problem
Existing vehicle control systems can cause discomfort to drivers due to discrepancies between perceived and actual relative distances and velocities, leading to inappropriate control timing and quantity, especially in collision avoidance scenarios.
Innovation Solution
A vehicle control apparatus and method that utilize perceived relative physical quantities, such as perceived relative distance and velocity, calculated based on actual values using expressions like Ds=Drn and Ds=α log(Dr/D0, to align vehicle control with a driver's perception, thereby reducing discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vehicle control is performed based on actual relative physical quantity, then control accuracy is improved, but driver discomfort increases
Solution Approach 1:
The patent introduces a perceived relative physical quantity as an intermediary between the actual relative physical quantity and the vehicle control. This intermediary transforms the actual values into perceived values that match driver perception characteristics, thereby resolving the contradiction between control accuracy and driver comfort by mediating the interaction between objective measurement and subjective perception
Solution Approach 2:
The patent changes the parameters used for control from actual relative physical quantities to perceived relative physical quantities. By transforming the control parameters to match driver perception characteristics (such as using perceived distance and perceived relative ratio instead of actual distance and velocity), the system maintains control accuracy while eliminating driver discomfort
2Reliability
If vehicle control uses actual relative distance and velocity, then control reliability is improved, but driver acceptance deteriorates
Solution Approach 1:
The perceived relative physical quantity serves as a mediator that bridges the gap between reliable actual measurements and driver acceptance. By using perceived values that reflect how drivers actually perceive distance and velocity, the system maintains control reliability while improving driver acceptance and reducing feelings of discomfort or loss of control
Solution Approach 2:
The patent creates a copy of the actual relative physical quantity in the form of perceived relative physical quantity. This copy is designed to match driver perception characteristics, allowing the control system to operate on reliable actual data while presenting control actions that appear natural and acceptable to the driver
Data Source
AI summary
A perceived relative distance that shows a relative distance between a host vehicle and a perception object perceived by a driver of the host vehicle is calculated on the basis of an actual relative distance therebetween. A perceived relative velocity that shows a relative velocity between the host vehicle and the perception object perceived by the driver is calculated on the basis of an actual relative velocity therebetween. A perceived relative ratio that is a ratio between the perceived relative distance and the perceived relative velocity is calculated. If the perceived relative ratio exceeds a threshold value, a vehicle control is performed.