Tyre Sensor Feedback for Accurate Vehicle Dynamics Control
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Solution Overview
Problem
Existing vehicle control systems rely on estimates of vehicle performance based on various inputs, which can be inaccurate, leading to suboptimal control of vehicle dynamics systems.
Innovation Solution
A method that utilizes tyre operation data from sensors to calculate vehicle dynamics parameters, such as contact patch loads and sideslip angles, and adjusts vehicle dynamics systems like ride height, stability control, and torque vectoring to enhance control accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vehicle control systems use estimates of vehicle performance based on various inputs, then control decisions can be made, but the estimation accuracy is insufficient leading to suboptimal control
Solution Approach 1:
The patent implements feedback by using tyre operation data (contact patch loads, deflections) as direct measurements to continuously update and refine vehicle state estimates. This feedback loop replaces inaccurate open-loop estimates with closed-loop measurements, improving both estimation accuracy and control reliability simultaneously
Solution Approach 2:
The patent substitutes mechanical sensor systems with tyre-based sensing that directly measures contact patch parameters. This replacement provides more accurate direct measurements of vehicle dynamics parameters compared to traditional indirect estimation methods, resolving the contradiction between measurement precision and control reliability
2Measurement precision
If tyre sensors and advanced calculation methods are implemented, then vehicle state estimation improves, but system complexity increases
Solution Approach 1:
The patent applies universality by using tyre sensors that serve multiple functions: measuring contact patch loads, deflections, and deriving vehicle dynamics parameters. This multi-functionality improves measurement precision without proportionally increasing system complexity, as a single sensor system provides multiple measurement capabilities
Solution Approach 2:
The patent changes parameters by deriving multiple vehicle dynamics parameters (sideslip angle, aerodynamic load, roll angle) from fundamental tyre contact patch measurements. This approach maintains relatively simple sensor hardware while achieving high measurement precision through sophisticated parameter derivation from basic sensor outputs
Data Source
AI summary
A method for adjusting one or more vehicle dynamics systems of a vehicle, the vehicle comprising a road wheel and at least one vehicle sensor configured to provide vehicle condition data, the road wheel comprising a tyre sensor configured to output tyre operation data, the method comprising: receiving tyre operation data from the tyre sensor; receiving vehicle condition data from at least one vehicle sensor; calculating one or more vehicle dynamics parameters based on the vehicle condition data and the tyre operation data; and adjusting one or more vehicle dynamics systems in response to the calculated one or more vehicle dynamics parameters.