Vehicle Rollover Warning Using Sprung-Mass Load Transfer Modeling
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Solution Overview
Problem
Existing vehicle rollover prevention systems inaccurately predict rollover risks due to neglecting the centrifugal force rollover moment of the sprung mass, leading to deviations from the actual rollover state and inaccurate warnings.
Innovation Solution
A method and device for vehicle rollover prevention that calculates the lateral-load transfer rate using a load transfer rate threshold model incorporating the centrifugal force rollover moment of the sprung mass, determining the rollover risk based on this calculation and providing warnings through display, voice, or instrument indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the centrifugal force rollover moment of the sprung mass is neglected in the rollover threshold model, then the model complexity is reduced and calculation is simplified, but the warning accuracy deteriorates and deviates from the actual rollover state
Solution Approach 1:
The patent modifies the rollover threshold model by incorporating the centrifugal force rollover moment parameter, transforming it from a simplified model to a more comprehensive dynamic model that accounts for the actual physics of rollover, thereby improving warning accuracy without excessive complexity increase
Solution Approach 2:
The patent replaces the simplified mechanical model with a more accurate dynamic mechanical model that includes centrifugal force effects, substituting the approximate approach with a physics-based approach that better represents the actual rollover mechanism
2Ease of operation
If conventional rollover thresholds (roll angle, lateral acceleration, LTR) are used, then the warning system is easier to implement, but the measurement precision deteriorates due to errors in measurement and diversified thresholds for different vehicle types
Solution Approach 1:
The patent introduces a dynamic rollover threshold model that acts as an intermediary between the simple conventional thresholds and the complex actual rollover physics, using calculated parameters based on vehicle dynamics to bridge the gap between ease of implementation and measurement precision
Solution Approach 2:
The patent transitions from static conventional thresholds to a dynamic threshold model that adapts to different vehicle types and driving conditions, making the system both easier to implement universally and more precise across diverse scenarios
Data Source
AI summary
A method, a device, a storage medium and a vehicle for vehicle rollover prevention warning, wherein the method for vehicle rollover prevention warning includes: collecting vehicle body rollover state parameters; calculating a lateral-load transfer rate of the vehicle according to the collected vehicle body rollover state parameters and a preset load transfer rate threshold model comprising the centrifugal force rollover moment of the sprung mass; and determining whether the vehicle has the risk of rollover or not according to the calculated lateral-load transfer rate and the preset rollover threshold. According to the technical solution provided by the invention, the load transfer rate threshold model based on the centrifugal force rollover moment of the sprung mass can simulate the actual rollover state of a vehicle more truly, with a more accurate state indication effect and a high warning accuracy.