Predictive Suspension Damping Control for High-Speed Road Variations
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional technologies for controlling electronically controlled suspension in vehicles fail to accurately recognize the state of a road surface ahead, leading to inadequate prediction and control of vehicle behavior and damping force during high-speed driving.
Innovation Solution
A vehicle suspension control apparatus and method that derive height values of a road surface using sensor information, determine the road surface state based on variance and differential values of these height values, predict vehicle behavior corresponding to the road surface state, and adjust the damping force of the suspension accordingly to enhance high-speed driving stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional sensor-based road surface recognition is used during high-speed driving, then the system can obtain road surface information, but the accuracy of recognizing road surface state (uphill, downhill, corrugated) deteriorates due to image blur and reduced resolution
Solution Approach 1:
The control apparatus performs preliminary classification of road surface states using variance and differential value calculations before detailed recognition. By pre-categorizing into three states (uphill, downhill, corrugated) based on simple statistical measures, the system prepares for accurate control without relying on high-resolution images during high-speed driving
Solution Approach 2:
The road surface recognition is segmented into distinct classification categories (uphill, downhill, corrugated) based on variance and differential value thresholds. This segmentation allows the system to handle different road conditions with specific control strategies rather than attempting continuous precise measurement
2Stability of the object's composition
If the suspension damping force is not adjusted accurately for predicted vehicle behavior, then the suspension system remains simple, but the vehicle stability and ride comfort deteriorate during high-speed driving on varying road surfaces
Solution Approach 1:
The control apparatus predicts vehicle behavior in advance by classifying road surface states before the vehicle encounters them. By determining the road state (uphill, downhill, corrugated) using variance and differential values, the system proactively adjusts suspension damping forces to maintain stability before actual disturbances occur
Solution Approach 2:
The system uses feedback from sensor measurements (variance and differential values of road surface height) to continuously adjust suspension control. The controller monitors road surface data, classifies the state, and modifies damping forces accordingly, creating a closed-loop control system that maintains vehicle stability
Data Source
AI summary
An apparatus for controlling a suspension of a vehicle to improve high-speed driving stability of the vehicle includes: a sensor that obtains information about a road surface ahead the vehicle during travel of the vehicle; and a controller that derives a height value of the road surface from the information about the road surface, determines a state of the road surface based on a differential value of the derived height value, predicts vehicle behavior corresponding to the determined state of the road surface, and controls a damping force of the suspension based on the predicted vehicle behavior.