Suspension Control Device Using Coupled Vehicle Model Computation
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Solution Overview
Problem
Existing vehicle suspension control technologies fail to adequately express vehicle behavior using reference vehicle models, which is crucial for achieving excellent ride comfort.
Innovation Solution
A suspension control device that employs a reference vehicle model computation section to calculate reference outputs by computing state amounts in both planar and up-down directions, ensuring inseparable and coupled calculations to accurately control suspension behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate computation methods are used for planar and up-down direction state amounts, then the computation structure is simpler, but the vehicle behavior expression is insufficient and ride comfort deteriorates
Solution Approach 1:
The patent merges the computation of planar direction state amounts and up-down direction state amounts into a single unified computation process. The reference vehicle model computation section simultaneously computes both types of state amounts based on common input signals (acceleration sensor outputs and steering angle sensor output), rather than using separate independent computation paths. This integration ensures that the coupling relationships between different motion directions are properly captured, improving vehicle behavior expression accuracy while avoiding unnecessary computational complexity
2Reliability
If a simple reference vehicle model is used, then the computation is faster and easier, but the ride comfort is insufficient
Solution Approach 1:
The reference vehicle model is designed to dynamically compute state amounts that reflect the actual coupled behavior of the vehicle during motion. The model adapts to different driving conditions by processing inputs from acceleration sensors and steering angle sensors to generate appropriate reference outputs for both planar and vertical motions, ensuring accurate ride comfort control without requiring overly complex static models
Data Source
AI summary
It is an object of the present invention to improve accuracy in estimation of a state of a vehicle in order to achieve excellent ride comfort. An ECU (600) includes a reference vehicle model computation section (1100), which is configured to calculate a reference output by carrying out computation with respect to at least one of a plurality of state amounts in a planar direction and at least one of a plurality of state amounts in an up-down direction in an inseparable manner.