Robustness and Applicability of a Model-Based Tire State Estimator for an Intelligent Tire

Tire states can be estimated by measuring the tire contact patch shape as it varies with vertical load, longitudinal and lateral slip, and so on. In this study, a miniature triaxial accelerometer is used to measure the centripetal accelerations at the tire inner liner. A tire state estimator (TSE) algorithm is developed to transform the measured...

Model-based State Estimator for an Intelligent Tire

In this work a Tire State Estimator (TSE) is developed and validated using data from a tri-axial accelerometer, installed at the inner liner of the tire. The Flexible Ring Tire (FRT) model is proposed to calculate the tire deformation. For a rolling tire, this deformation is transformed into tangential and radial accelerations of a point on the...

Analysis of vehicle and driving condition influences on road classification from vehicle signals

Suspension settings generally are a compromise for performance on different road roughness and stability requirements. With a priori information of the road roughness a superior performance can be achieved, and this information can be obtained from vehicle based road classification methods that use axle acceleration signals. This paper discusses...

Motorcycle state estimation for lateral dynamics

The motorcycle lean (or roll) angle development is one of the main characteristics of motorcycle lateral dynamics. Control of motorcycle motions requires an accurate assessment of this quantity and for safety applications also the risk of sliding needs to be considered. Direct measurement of the roll angle and tyre slip is not available;...

The electromechanical low-power active suspension: Modeling, control, and prototype testing

The high energy consumption of market-ready active suspension systems is the limiting factor in the competition with semi-active devices. The variable geometry active suspension is an alternative with a significantly lower power consumption. However, previous designs suffer from packaging problems, nonlinear stiffness characteristics, and...

On the achievable performance using variable geometry active secondary suspension systems in commercial vehicles

There is a need to further improve driver comfort in commercial vehicles. The variable geometry active suspension offers an interesting option to achieve this in an energy efficient way. However, the optimal control strategy and the overal performance potential remains unclear. The aim of this paper is to quantify the level of performance...

Experimental validation of a truck roll model using asynchronous measurements with low signal-to-noise ratios

There is a large body of literature on model validation, but there is no method available that can effectively use asynchronous repeated measurements with low signal-to-noise ratios. The aim of this paper is to present a novel frequency-domain model validation method, which is suitable for this type of measurements. The practical relevance of...