Active Vehicle Suspension Using 3D Road Contour Detection
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Solution Overview
Problem
Existing vehicle suspension systems, particularly passive and semi-active systems, fail to effectively reduce cabin vibrations caused by road unevenness, and active systems are expensive and limited to high-end vehicles.
Innovation Solution
An automatic vehicle suspension system utilizing 3D sensing technology to build real-time road contours, which generates control signals for fast expansion and compression of shock absorbers to mitigate vibrations, incorporating a 3D sensor, contour builder, road contour unit, suspension controller, vehicle suspension system, and cloud management system for dynamic control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive suspension systems are used, then the system is simple and inexpensive, but the system cannot effectively reduce cabin vibrations from road unevenness
Solution Approach 1:
The system performs preliminary action by detecting road unevenness before the vehicle reaches it and pre-adjusting the shock absorbers. The contour builder constructs a 3D road contour map in advance, and the suspension controller prepares the suspension system to counteract upcoming vibrations, eliminating cabin vibrations proactively rather than reactively.
Solution Approach 2:
The invention replaces purely mechanical passive suspension with an intelligent control system that uses 3D sensing technology, contour building algorithms, and electronic control units. This substitution enables real-time detection and active adjustment of suspension parameters, transforming the system from passive mechanical response to active intelligent control.
2Object-affected harmful factors
If active suspension systems are used, then cabin vibrations are effectively reduced, but the system becomes expensive and complex
Solution Approach 1:
The system segments the suspension control into independent wheel units, each with its own shock absorber controlled by the suspension controller based on local road conditions detected by the 3D sensor. This modular segmentation allows targeted control where needed while maintaining simplicity in areas where road conditions are favorable, reducing overall system complexity and cost.
Solution Approach 2:
The suspension controller serves multiple functions: it processes 3D contour data, calculates optimal suspension parameters, controls individual shock absorbers, and adapts to different driving conditions. This multi-functionality consolidates what would otherwise require separate systems into a single integrated control unit, reducing complexity while maintaining advanced vibration reduction capabilities.
3Measurement precision
If real-time road contour detection is implemented, then suspension control precision is improved, but the system requires advanced 3D sensing technology increasing complexity
Solution Approach 1:
The contour builder acts as an intermediary that processes raw 3D sensor data and transforms it into a usable road contour map. This intermediate representation simplifies the complex sensor data into meaningful road profile information that the suspension controller can directly use for control decisions, reducing the complexity of the overall sensing and control system.
Data Source
AI summary
An apparatus of automatic vehicle suspension system is provided. Road conditions are precisely monitored for reducing vibrations of cabin. Uneven road surface is crossed over through fast expansion and compression of shock absorber just in time. The present invention uses real-time control of an active suspension system to build road contour at real time. At the same time, control signals having better suspension dynamic characteristics are updated at real time for further obtaining a superior and precise suspension system.