Vehicle Control Device Dynamic Communication Interruption Detection
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Solution Overview
Problem
Existing vehicle control systems face challenges in accurately acquiring and utilizing travel information from leading vehicles through wireless communication, leading to inappropriate switching of control modes and potential rear-end collisions due to communication interruptions.
Innovation Solution
A vehicle control device that adjusts its control mode based on inter-vehicle time and communication interruption determining time, switching from communication-following to autonomous-following control when communication is interrupted, ensuring timely deceleration matching with the leading vehicle to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mode of travel control is switched as soon as the travel information is no longer appropriately received, then the communication interruption can be detected quickly, but the control becomes troublesome and the mode switches more than necessary
Solution Approach 1:
The patent applies dynamics by making the communication interruption determining time variable rather than fixed. The time is dynamically adjusted based on the inter-vehicle time parameter - when inter-vehicle time is short, the determining time is shortened to enable quick detection; when inter-vehicle time is long, the determining time is extended to prevent unnecessary switches. This dynamic adjustment resolves the contradiction between quick detection and control stability.
2Ease of operation
If a fixed communication interruption determining time is used, then the control logic is simple, but it cannot adapt to different inter-vehicle time conditions leading to inappropriate mode switching
Solution Approach 1:
The patent changes the parameter of communication interruption determining time based on the inter-vehicle time parameter. Instead of using a fixed time value, the system adjusts the determining time proportionally to the inter-vehicle time, allowing the control system to adapt to different travel states (different distances from leading vehicle) while maintaining a relatively simple control logic structure.
3Speed
If the communication interruption determining time is set too short, then communication interruptions are detected quickly, but mode switching occurs too frequently during normal communication fluctuations
Solution Approach 1:
The patent adjusts the communication interruption determining time parameter based on the inter-vehicle time to prevent both too-quick and too-slow detection. By making the determining time proportional to the inter-vehicle time, the system ensures that detection speed is appropriate for each specific travel condition, avoiding unnecessary mode switching while still detecting real communication interruptions promptly.
Data Source
AI summary
A vehicle control device capable of more appropriately carrying out travel control of an own vehicle carried out while acquiring travel information of a leading vehicle by an inter-vehicle communication is provided. Provided is a vehicle control device for carrying out vehicle control of acquiring inter-vehicle communication information of a leading vehicle travelling in front of an own vehicle, and controlling a travel state of the own vehicle based on the acquired inter-vehicle communication information of the leading vehicle, wherein control of the inter-vehicle communication is changed according to a parameter at the time of the vehicle control.