Piecewise affine identification modeling method for longitudinal sliding mechanical properties of tires

Abstract

The invention discloses a piecewise affine identification modeling method for longitudinal sliding mechanical properties of tires. The piecewise affine identification modeling method includes the steps that a test of the longitudinal sliding mechanical properties of the tires is carried out, and test data reflecting the longitudinal sliding mechanical properties of the tires is accurately obtained; a three-dimensional curved surface map reflecting the nonlinear relationship between the tire longitudinal force, the tire vertical load and the tire longitudinal slip ratio is drawn based on the test data; a three-dimensional curved surface is divided into a finite number of sub-planes based on a heuristic approximation method, then the three-dimensional coordinates of points for dividing the sub-planes are determined, and a boundary line equation for dividing action areas of affine sub-models is further obtained; the trial and error method is used for determining the order of each affine sub-model, and then specific parameters of the sub-models are identified based on the least square method; and the output result of the piecewise affine models of the longitudinal sliding mechanical properties of the tires which is obtained by identification is compared with experimental data to verify the accuracy of the identification models. The piecewise affine identification modeling method meets the accuracy requirements of the tire models and performs the vehicle system dynamic control design base on the same.

Description

technical field [0001] The invention relates to a segmented affine identification modeling method for tire longitudinal sliding mechanical properties, in particular to the identification and modeling of tire longitudinal sliding mechanical properties using segmental affine technology, and belongs to the field of vehicle system dynamics simulation and its control . Background technique [0002] Tires are an important part of the vehicle. They are in direct contact with the ground, and their main function is to support the weight of the vehicle, and together with the suspension to buffer the unevenness excitation from the road surface, so as to ensure that the vehicle has good ride comfort and smooth driving; to ensure that the wheels and The road surface has good adhesion to improve vehicle driving, braking and passability, and provide sufficient steering force for the vehicle. Modern tires are complex viscoelastic structures with distinct nonlinear mechanical properties. ...

AI Technical Summary

Problems solved by technology

[0005] In the actual industrial process, the physical characteristics of many controlled objects present complex dynamic characteristics, so it is difficult for such objects to be accurately described by the mechanism model obtained by analytical means

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