Pneumatic tire model for aircraft simulation

Abstract This paper discusses the measurement and modeling of tire rolling resistance for a group of radial medium truck tires. The tires were subjected to tread depth modifications by “buffing” the tread surface. The experimental work used the equilibrium test method of SAE J-1269. The finite element analysis (FEA) tire model for tire rolling resistance has been previously presented. The results of the testing showed changes in rolling resistance as a function of tread depth that were inconsistent between tires. Several observations were also inconsistent with published information and common knowledge. Several mechanisms were proposed to explain the results. Additional experiments and models were used to evaluate the mechanisms. Mechanisms that were examined included tire age, surface texture, and tire shape. An explanation based on buffed tread radius, and the resulting changes in footprint stresses, is proposed that explains the observed experimental changes in rolling resistance with tread depth.

Download Full-text

An Analytical Transient Tire Model

Tire Science and Technology ◽

10.2346/1.2135231 ◽

2001 ◽

Vol 29 (2) ◽

pp. 108-132 ◽

Cited By ~ 1

Author(s):

A. Ghazi Zadeh ◽

A. Fahim

Keyword(s):

Transient Behavior ◽

Stability Control ◽

Vehicle Stability ◽

Tire Model ◽

Steering Angle ◽

First Order ◽

Vehicle Stability Control ◽

Proposed Model ◽

Depth Study ◽

And Performance

Abstract The dynamics of a vehicle's tires is a major contributor to the vehicle stability, control, and performance. A better understanding of the handling performance and lateral stability of the vehicle can be achieved by an in-depth study of the transient behavior of the tire. In this article, the transient response of the tire to a steering angle input is examined and an analytical second order tire model is proposed. This model provides a means for a better understanding of the transient behavior of the tire. The proposed model is also applied to a vehicle model and its performance is compared with a first order tire model.

Download Full-text

A Modified Dugoff Tire Model for Combined-slip Forces

Tire Science and Technology ◽

10.2346/1.3481696 ◽

2010 ◽

Vol 38 (3) ◽

pp. 228-244 ◽

Cited By ~ 19

Author(s):

Nenggen Ding ◽

Saied Taheri

Keyword(s):

Vehicle Dynamics ◽

Tire Model ◽

Magic Formula ◽

Model Based ◽

Proposed Model ◽

Road Friction ◽

On Line ◽

Double Lane Change ◽

Tire Forces ◽

Tire Models

Abstract Easy-to-use tire models for vehicle dynamics have been persistently studied for such applications as control design and model-based on-line estimation. This paper proposes a modified combined-slip tire model based on Dugoff tire. The proposed model takes emphasis on less time consumption for calculation and uses a minimum set of parameters to express tire forces. Modification of Dugoff tire model is made on two aspects: one is taking different tire/road friction coefficients for different magnitudes of slip and the other is employing the concept of friction ellipse. The proposed model is evaluated by comparison with the LuGre tire model. Although there are some discrepancies between the two models, the proposed combined-slip model is generally acceptable due to its simplicity and easiness to use. Extracting parameters from the coefficients of a Magic Formula tire model based on measured tire data, the proposed model is further evaluated by conducting a double lane change maneuver, and simulation results show that the trajectory using the proposed tire model is closer to that using the Magic Formula tire model than Dugoff tire model.

Download Full-text

A Double Interaction Brush Model for Snow Conditions

Tire Science and Technology ◽

10.2346/tire.18.460404 ◽

2019 ◽

Vol 47 (2) ◽

pp. 118-140

Author(s):

Artem Kusachov ◽

Fredrik Bruzelius ◽

Mattias Hjort ◽

Bengt J. H. Jacobson

Keyword(s):

Low Complexity ◽

Large Set ◽

Tire Model ◽

Vehicle Handling ◽

Real Time Applications ◽

Snow Conditions ◽

Double Interaction ◽

Tire Models ◽

Force Characteristics ◽

Model Approach

ABSTRACT Commonly used tire models for vehicle-handling simulations are derived from the assumption of a flat and solid surface. Snow surfaces are nonsolid and may move under the tire. This results in inaccurate tire models and simulation results that are too far from the true phenomena. This article describes a physically motivated tire model that takes the effect of snow shearing into account. The brush tire model approach is used to describe an additional interaction between the packed snow in tire tread pattern voids with the snow road surface. Fewer parameters and low complexity make it suitable for real-time applications. The presented model is compared with test track tire measurements from a large set of different tires. Results suggest higher accuracy compared with conventional tire models. Moreover, the model is also proven to be capable of correctly predicting the self-aligning torque given the force characteristics.

Download Full-text

In-Plane Flexible Ring Tire Model—Part 1: Modeling and Parameter Identification

Tire Science and Technology ◽

10.2346/tire.18.460303 ◽

2018 ◽

Vol 46 (3) ◽

pp. 174-219 ◽

Cited By ~ 2

Author(s):

Bin Li ◽

Xiaobo Yang ◽

James Yang ◽

Yunqing Zhang ◽

Zeyu Ma

Keyword(s):

Static Load ◽

Model Parameters ◽

Tire Model ◽

Test Results ◽

Lumped Mass ◽

Virtual Test ◽

Proposed Model ◽

Particle Swarm Method ◽

Vehicle Dynamic Simulation ◽

Flexible Ring

ABSTRACT The tire model is essential for accurate and efficient vehicle dynamic simulation. In this article, an in-plane flexible ring tire model is proposed, in which the tire is composed of a rigid rim, a number of discretized lumped mass belt points, and numerous massless tread blocks attached on the belt. One set of tire model parameters is identified by approaching the predicted results with ADAMS® FTire virtual test results for one particular cleat test through the particle swarm method using MATLAB®. Based on the identified parameters, the tire model is further validated by comparing the predicted results with FTire for the static load-deflection tests and other cleat tests. Finally, several important aspects regarding the proposed model are discussed.

Download Full-text

A New Tire Model to Predict Vibration Emission of Counterbalance Trucks

Tire Science and Technology ◽

10.2346/1.2135994 ◽

2000 ◽

Vol 28 (2) ◽

pp. 119-137 ◽

Cited By ~ 1

Author(s):

P. Lemerle ◽

P. Mistrot

Keyword(s):

Numerical Model ◽

Numerical Simulations ◽

Close Agreement ◽

Industrial Sector ◽

Tire Model ◽

Suspension Systems ◽

Truck Tires ◽

Pneumatic Tires

Abstract Counterbalance trucks are machines in widespread use in every industrial sector. Unlike cars, they are not designed with suspension systems. Consequently, they are considered to be high vibrating vehicles. Nevertheless, like suspension seats, tires can be selected as suspension parts. This paper presents a new numerical model for the analysis of the vibratory behavior of counterbalance truck tires. This model was intended to be a part of a fork lift truck model, including axles, chassis, and cabin. All the results reported here show a close agreement between measurements and numerical simulations. Thus, it can predict the vibration emission values at the driving position and is used to compare the efficiency of solid tires with pneumatic tires in terms of transmitted vibration levels.

Download Full-text

Techniques for Determining the Parameters of a Two-Dimensional Tire Model for the Study of Ride Comfort

Tire Science and Technology ◽

10.2346/1.2137540 ◽

1997 ◽

Vol 25 (3) ◽

pp. 187-213 ◽

Cited By ~ 7

Author(s):

F. Mancosu ◽

G. Matrascia ◽

F. Cheli

Keyword(s):

Physical Properties ◽

Ride Comfort ◽

Dynamic Test ◽

Longitudinal Direction ◽

Tire Model ◽

Rigid Ring ◽

Ring Model ◽

Mass Moment ◽

A New Technique ◽

And Performance

Abstract A rigid ring model of the tire for the study of in-plane dynamics and a new technique for determining the parameters of the model are presented in this paper. This model can be used for studying the comfort of vehicles, problems of driving, and braking problems in the longitudinal direction. Comparison with finite element models shows that the rigid ring model of the tire is capable of describing the in-plane eigenmode shapes in the frequency range of 0–130 Hz. The well-known “brush model,” integrated into the tire model, is introduced to take into account the slide phenomena in the contact patch. The parameters of the model can be correlated with the physical properties of the tire so that designers can take advantage of such a correlation in the development of new tires in terms of time, cost, and performance. The technique used to determine the parameters of the model for some automobile tires include the direct measurements of some physical properties (mass, moment of inertia, stiffness) and a method of identification applied on the results from a dynamic test. The model is able to predict experimental data in terms of natural frequencies and relative dampings. Results from the application of this technique on two tires are reported.

Download Full-text