Method for predicting dynamic behavior characteristics of a vehicle using screw theory
AssigneeHyundai Motor Company
InventorUnkoo Lee
Life of this patent
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Abstract
A vehicle model is developed for a quasi-static analysis. The quasi-static analysis is performed for the vehicle model under a cornering condition in which a specific lateral force acts. A finite screw axis is determined based on a rigid body displacement of the vehicle model with respect to the ground through the quasi-static analysis. A fixed screw axis surface formed by a migration of the finite screw axis is also determined. The gradients of screw parameters with respect to lateral forces when the vehicle model behaves in an initial cornering state are calculated. Roll behavior is then estimated based on the fixed screw axis surface and gradients of screw parameters.
Claims17
A method for predicting dynamic behavior characteristics of a vehicle, comprising:
- developing a vehicle model for a quasi-static analysis;
- performing the quasi-static analysis for the vehicle model under a cornering condition in which a specific lateral force acts;
- determining a finite screw axis based on a rigid body displacement of the vehicle model with respect to the ground through the quasi-static analysis;
- determining a fixed screw axis surface formed by a migration of the finite screw axis;
- calculating gradients of screw parameters with respect to the lateral force when the vehicle model behaves in an initial cornering state;
- and
- estimating roll behavior based on the fixed screw axis surface and gradients of screw parameters.
A method for predicting dynamic behavior characteristics of a vehicle, comprising:
- determining screw parameters and gradients of the screw parameters of a fixed screw axis through an analysis of a quasi-static vehicle model;
- and
- estimating roll behavior of the vehicle based on the determined screw parameters and the gradients of the screw parameters.
Dependencies are inferred from the claim text.