Method for the Simulation of the Physical Behavior of a Tire Rolling on the Ground
1 Assignment
0 Petitions
Accused Products
Abstract
A method of simulating the physical behavior of a tire equipping a vehicle rolling on the ground, wherein the tread of the tire has a contact area which includes an adherent contact area and a sliding contact area, wherein the method comprises the steps of: calculating longitudinal forces and lateral forces transmitted by the tire, between the ground and the vehicle, based on dynamic parameters related to physical rolling and operating conditions of the tire and based on specific physical parameters of the tire; establishing, over the course of a preliminary phase, by applying physical laws which are known and/or established by specific experiments, and as a first model, a model of the longitudinal forces, the lateral forces, a self-aligning torque related to the intensity of these forces and to the distribution of same within the contact area, and of an equilibrium of the basic shear and sliding forces of the tire at a presumed unique point of passage between the adherent and sliding contact regions, this first model taking the form of a system of respective equations expressed in relation to the dynamic parameters, the specific parameters, and the abscissa of the point of passage; assigning values to the dynamic parameters and to the specific parameters, with a view to a digital application; and solving, by successive approximations, over the course of a digital application iterative phase including a succession of computation cycles, and at least from previously known or estimated values of the abscissa of the point of passage, of the lateral forces, and of the self-aligning torque of new values for the abscissa of the point of passage, of the lateral forces, and of the self-aligning torque, which solve the system of equations of the first model for the values assigned to the dynamic parameters and to the specific parameters, the result of which is that the longitudinal forces, the lateral forces and the self-aligning torque can be computed in real time as the vehicle is traveling.
-
Citations
19 Claims
-
1-10. -10. (canceled)
-
11. A method of simulating the physical behavior of a tire equipping a vehicle rolling on the ground, wherein the tread of the tire has a contact area which includes an adherent contact area and a sliding contact area, wherein the method comprises the steps of:
-
calculating longitudinal forces and lateral forces transmitted by the tire, between the ground and the vehicle, based on dynamic parameters related to physical rolling and operating conditions of the tire and based on specific physical parameters of the tire; establishing, over the course of a preliminary phase, by applying physical laws which are known and/or established by specific experiments, and as a first model, a model of the longitudinal forces, the lateral forces, a self-aligning torque related to the intensity of these forces and to the distribution of same within the contact area, and of an equilibrium of the basic shear and sliding forces of the tire at a presumed unique point of passage between the adherent and sliding contact regions, this first model taking the form of a system of respective equations expressed in relation to the dynamic parameters, the specific parameters, and the abscissa of the point of passage; assigning values to the dynamic parameters and to the specific parameters, with a view to a digital application; and solving, by successive approximations, over the course of a digital application iterative phase including a succession of computation cycles, and at least from previously known or estimated values of the abscissa of the point of passage, of the lateral forces, and of the self-aligning torque of new values for the abscissa of the point of passage, of the lateral forces, and of the self-aligning torque, which solve the system of equations of the first model for the values assigned to the dynamic parameters and to the specific parameters, the result of which is that the longitudinal forces, the lateral forces and the self-aligning torque can be computed in real time as the vehicle is traveling. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
Specification