Preview Damping Control Using Shared Road Displacement Data
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Solution Overview
Problem
Current preview damping control systems require a large number of vehicles to travel on the same road at various lateral positions to effectively acquire and store road surface information, limiting their ability to reduce vehicle vibration across the entire width of roads and lanes.
Innovation Solution
A preview damping control apparatus and method that uses an in-vehicle control device to detect road surface displacement-related information and a preview reference database to associate and store this information, allowing for the assumption of consistent road surface displacement values in adjacent regions, thereby reducing the need for multiple vehicles to gather data across different positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If road surface information is acquired using laser sensors or motion state quantity detection sensors, then measurement precision is improved, but the lateral range of information acquisition is reduced
Solution Approach 1:
The patent combines road surface information from multiple vehicles traveling at different lateral positions into a unified database. By merging data from multiple sources (vehicles at different positions), the system achieves both high measurement precision (from individual sensor accuracy) and broad lateral coverage (from aggregated data across multiple vehicles and positions).
Solution Approach 2:
The patent transitions from a single-vehicle perspective to a multi-vehicle spatial dimension. Instead of relying on one vehicle to scan the entire lateral range, the system collects data from multiple vehicles operating at different lateral positions simultaneously, effectively expanding the coverage area through spatial distribution across multiple dimension (different vehicles, different positions, different times).
2Area of stationary object
If a large number of vehicles travel on the same road at various lateral positions to acquire road surface information, then the lateral range of database coverage is improved, but device complexity and operational requirements increase
Solution Approach 1:
The system enables each vehicle to independently contribute to the database by autonomously detecting and transmitting its own road surface information. Each vehicle serves itself and simultaneously contributes to the collective database, eliminating the need for centralized data collection infrastructure and reducing system operational complexity while expanding database coverage.
Solution Approach 2:
The road surface information database serves multiple functions: it provides preview damping control data, enables vibration reduction across different road positions, and accumulates information from various lateral positions. This multi-functionality allows the system to achieve broad coverage without proportionally increasing complexity, as the same infrastructure supports multiple objectives.
3Adaptability or versatility
If road surface information is acquired across the entire width of roads and lanes, then adaptability to different road positions is improved, but the quantity of data acquisition requirements increases
Solution Approach 1:
The system performs preliminary data aggregation by collecting road surface information from multiple vehicles at different lateral positions and storing it in advance in a database. This preliminary action ensures that when any vehicle needs road surface information for its specific position, the data is already available, eliminating the need for real-time data collection across the entire road width and reducing the immediate quantity of data that must be acquired.
Data Source
AI summary
A damping force control apparatus for a vehicle in which road surface displacement-related information detected by an in-vehicle detection device is transmitted to a preview reference database control device together with detection position information, a preview reference database including road surface displacement-related values is made, preview damping control that reduces vibration of a sprung of the vehicle is performed using the road surface displacement-related values in the preview reference database, and it is assumed that a road surface displacement-related value in a predetermined adjacent region located in a direction crossing a traveling direction of the vehicle with respect to a point where the road surface displacement-related information was detected by the in-vehicle detection device is the same as the road surface displacement-related value at the above point.