Transient Tire Load Estimation Using Equilibrium Load Filtering
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Solution Overview
Problem
Current methods for estimating transient tire load in vehicles are computationally demanding and resource-intensive, failing to provide accurate real-time estimates, especially in dynamic scenarios.
Innovation Solution
A computer-implemented method that acquires equilibrium tire load values at a given time frame and previous time frames, using vehicle dynamics equations and a second-order filter to determine transient tire load, allowing for accurate and resource-efficient estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional complicated models are used to estimate transient tire load, then measurement precision is improved, but device complexity and computational resources increase
Solution Approach 1:
The estimation process is segmented into two distinct components: equilibrium tire load estimation using simplified vehicle dynamics equations, and transient tire load estimation using a second-order filter. This segmentation allows each component to be optimized independently, achieving accurate transient load estimation without requiring a single complex model.
Solution Approach 2:
A second-order filter is introduced as an intermediary component that processes the equilibrium tire load values to derive transient tire load estimates. This intermediary approach enables the system to capture dynamic transient behavior without directly modeling the complex transient physics, thereby reducing overall model complexity while maintaining estimation accuracy.
2Measurement precision
If conventional complicated models are used to estimate transient tire load, then measurement precision is improved, but productivity decreases due to substantial computational resources required
Solution Approach 1:
By segmenting the estimation into equilibrium load calculation (using simple vehicle dynamics equations) and transient load filtering (using a second-order filter), the computational burden is divided into two efficient stages. This allows real-time processing while maintaining accuracy, as neither stage requires computationally intensive operations.
Solution Approach 2:
The patent replaces complex mechanical/transient modeling with a mathematical filtering approach. Instead of using intricate dynamic models that require substantial computation, a second-order filter is applied to the equilibrium load values, dramatically reducing computational requirements while preserving transient load estimation accuracy in real-time.
3Measurement precision
If conventional complicated models are used to estimate transient tire load, then measurement precision is improved, but loss of time increases due to insufficiently short estimation time
Solution Approach 1:
The equilibrium tire load is calculated first using simplified vehicle dynamics equations, providing a baseline value before the transient component is added. This preliminary action allows the system to quickly establish the static load component and then efficiently compute the transient component through filtering, reducing overall estimation time while maintaining precision.
Solution Approach 2:
Complex transient dynamic modeling is replaced with a second-order filter applied to the equilibrium load values. This substitution dramatically reduces the computational time required for transient load estimation, enabling real-time accuracy without the time penalty of intricate mechanical models.
Data Source
AI summary
A computer-implemented method for driven at a given time frame is disclosed. The method comprises the steps of: acquiring a value of a given equilibrium tire load of the at least one wheel of the vehicle at the given time frame; obtaining at least one value of the equilibrium tire load of the at least one wheel of the vehicle at at least one time frame before the given time frame; obtaining at least one value of the transient tire load of the at least one wheel of the vehicle at the at least one time frame before the given time frame; and determining the value of the given transient tire load of the at least one wheel of the vehicle.