Method of control to determine the comfort level of a tire of a

Details Method of control to determine the comfort level of a tire of a Method of control to determine the comfort level of a tire of a

1996-11-18

1998-09-22

Oen, William L.

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

E01C 2300, G01M 1702

Patent

active

058116729

ABSTRACT:
A method of control to determine the comfort level of a tire of a wheel for a vehicle is based on a dynamic tire model with a rigid ring having concentrated parameters that represent construction characteristics of the tire. Some concentrated parameters are measured, others are determined by parametric identification through a test of passing over an obstacle of the tire. From testing eight curves of natural frequencies and dampenings are obtained that are compared with as many calculated curves obtained from the model. By checking the coincidence between the eight calculated curves and the eight experimental curves, the values of the other concentrated parameters are determined that cause the calculated frequencies and dampenings to coincide with the experimental ones. The values of the concentrated parameters obtained in this way are compared with ranges of values of dampenings and stiffness corresponding to pre-established indices of comfort, so as to approve those tires wherein the concentrated parameters fall within predetermined intervals.

REFERENCES:
patent: 4817421 (1989-04-01), Himmler
Proceedings of the 1992 American Control Conference vol. 1, 24-26 Jun. 1992, pp. 526-530, L.R., Ray "Nonlinear Estimation of Vehicle State and Tire Forces".
P.W.A. Zegelaar et al, "Tyre Models for the Study of In-Plane Dynamics" The Dynamics of Vehicle on Roads and on Tracks, Supplement to Vehicle System Dynamics, vol. 23, pp. 578-590 (1994). No month.
R.S. Sharp et al, "The Influence of Structural Flexibilities on the Straight-running Stability of Motorcycles" Vehicle Systems Dynamics 9, pp. 327-357 (1980). No month.
David A. Sacrist et al, "A Simulation of Vehicle and Tire Dynamics," pp. 139-146, 1974 Joint Automatic Control Conference (1974). No month.
O.P. Agrawal et al, "A Superelement Model Based Parallel Algorithm for Vehicle Dynamics" Computer &Structures, vol. 51, No. 4, pp. 411-423 (1994). No month.

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