Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 03 Dec 2020

Development of a Characterization Method of Tire-Handling Dynamics Based on an Optical Measuring System

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Page Range: 298 – 314
DOI: 10.2346/tire.20.190214
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ABSTRACT

Tire force and moment (F&M) characteristics are important for the analysis and design of vehicle-handling dynamics and ride comfort. Compared with a general tire F&M measuring method, it provides a detailed insight into the generation of tire F&M characteristics by measuring the tire carcass deformation during static and side-slip maneuvers. A tire observation system with two GOM optical measuring facilities was developed to characterize the tire carcass deformation of the standing and rolling tire. Structural parameters of tire carcass flexibility have been identified based on a polynomial physical tire model with the help of measured bending curves of the tire carcass. A good correlation between the measured and estimated tire force and moment has proven the validity of the developed characterization method.

Keywords: tire-handling dynamics; tire force and moment characteristics; tire carcass deformation; optical measuring system; parameter identification
FIG. 1 —
FIG. 1 —

Overview of the tire observation system (TOS) with two GOM optical measuring equipments.

FIG. 2 —
FIG. 2 —

Video postprocessing of GOM Aramis data from (a) the GOM system above and (b) the GOM system below.

FIG. 3 —
FIG. 3 —

Definition of angular displacement ϑ about the negative y axis.

FIG. 4 —
FIG. 4 —

Bending curve of the tire carcass in the rim coordinate in dependency of sliding plate travel sy and lateral force Fy under wheel load 5000 N.

FIG. 5 —
FIG. 5 —

Time procedure of sliding plate travel sy, carcass lateral deformation ζ at ϑ = 0°, and lateral force Fy under wheel load 5000 N.

FIG. 6 —
FIG. 6 —

Bending curve of the tire carcass in the rim coordinate in dependency of the sliding plate turning angle ψ and bore moment MB under wheel load 5000 N.

FIG. 7 —
FIG. 7 —

Time procedure of sliding plate turning angle ψ, carcass turning angle ψcarc about the z axis at the contact patch in the rim coordinate, and bore moment MB under wheel load 5000 N.

FIG. 8 —
FIG. 8 —

Schematic presentation of filmed photos with TOS at slip angle α = 0° (a, b) and at slip angle α = 6° (c, d) in slip-angle sweep experiments at a rolling speed of 60 km/h.

FIG. 9 —
FIG. 9 —

Bending curve of the tire carcass in the rim coordinate in dependency of the slip angle α and lateral force Fy under a wheel load of 5000 N at a rolling speed of 60 km/h.

FIG. 10 —
FIG. 10 —

Time procedure of slip angle α, carcass lateral deformation ζ at ϑ = 0°, and lateral force Fy under a wheel load 5000 N at a rolling speed of 60 km/h.

FIG. 11 —
FIG. 11 —

Schematic presentation of three sorts of carcass deflections according to polynomial tire model.

FIG. 12 —
FIG. 12 —

Measured bending curve of tire carcass and fitting curve in the rim coordinate in dependency of the sliding plate travel syand lateral force Fy under a wheel load of 5000 N.

FIG. 13 —
FIG. 13 —

Time procedure of sliding plate travel sy, carcass lateral deformation at ϑ = 0°, and identified carcass lateral stiffness ccy under a wheel load of 5000 N.

FIG. 14 —
FIG. 14 —

Time procedure of sliding plate travel sy, carcass lateral deformation at ϑ = 0°, and identified carcass bending stiffness ccB under a wheel load of 5000 N.

FIG. 15 —
FIG. 15 —

Time procedure of sliding plate travel sy, carcass lateral deformation at ϑ = 0°, measured and estimated lateral force under a wheel load of 5000 N.

FIG. 16 —
FIG. 16 —

Measured bending curve of the tire carcass and fitting curve in the rim coordinate in dependency of the sliding plate turning angle ψ and bore moment MB under a wheel load of 5000 N.

FIG. 17 —
FIG. 17 —

Time procedure of the sliding plate turning angle ψ, carcass lateral deformation at ϑ = 0°, and identified carcass torsional stiffness ccψ under a wheel load of 5000 N.

FIG. 18 —
FIG. 18 —

Time procedure of sliding plate turning angle ψ, carcass turning angle ψcarc, measured and estimated bore moment under a wheel load of 5000 N.

FIG. 19 —
FIG. 19 —

Measured and estimated bending curves of the tire carcass in the rim coordinate in dependency of the slip angle α and lateral force Fy under a wheel load of 5000 N at 60 km/h.

FIG. 20 —
FIG. 20 —

Time procedure of slip angle α, carcass lateral deformation at ϑ = 0°, measured and estimated lateral force under a wheel load of 5000 N at 60 km/h.

Contributor Notes

1 Technische Universität Dresden, George-Bähr-Straße 1b, Dresden, Saxony, DE-01069, Germany
2 Corresponding author. Email: chao.liu@mailbox.tu-dresden.de
3 Auto Mobil Forschung Dresden GmbH, Freiberger Straße 37, Dresden, Saxony, DE-01067, Germany
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