Front and back hanger bracket rigidity distribution method for controlling car body level jump pitching coupling movement

Abstract

The invention discloses a front and back hanger bracket rigidity distribution method for controlling a car body level jump pitching coupling movement. A car body level jump pitching coupling movement model is built; the model comprises a car body concentration mass block, a hanger bracket torsion spring, a hanger bracket linear support spring, a front wheel concentrate mass block, a rear wheel concentrate mass block, a front wheel linear support spring, a rear wheel linear support spring and a front and rear wheel connecting shaft; according to the coupling movement model, a rigidity coefficient matrix is built; the coupling movement model rigidity coefficient matrix is made a contrast with a modeling rigidity coefficient matrix in a traditional half-vehicle pitching plane, and ratios of a moment of force of the pitch angle rigidity, the level jump rigidity, a level jump movement and the pitch angle rigidity to the level jump rigidity are deduced; a coordination design of the front and rear hanger bracket rigidity is transmitted to a maximum value design of the ratio of the pitch angle rigidity and the level jump rigidity, and the distribution of the front and rear hanger bracket rigidity is conducted; car body coupling movement characters and explicit relations of the front and rear hanger bracket rigidity distribution are obtained, and reasonable control for the car body coupling movement characters is achieved.

Description

technical field [0001] The invention relates to the technical field of automobile engineering, in particular to a front and rear suspension stiffness distribution method for controlling coupled motions generated by car body jumping and pitching. Background technique [0002] figure 2 Shown is the model of a traditional semi-vehicle in the pitch plane, which consists of body mass mass 1, front wheel mass mass 2, rear wheel mass mass 3, front suspension linear support spring 4, and rear suspension linear support spring 5 , front wheel linear support spring 6, rear wheel linear support spring 7 form. The upper end of the front suspension linear support spring 4 is connected with the centralized mass block 1 of the car body, and the lower end is connected with the centralized mass block 2 of the front wheel; the upper end of the rear suspension linear support spring 5 is connected with the concentrated mass block 1 of the car body, and the lower end is connected with the rear w...

AI Technical Summary

Problems solved by technology

However, since the front and rear suspensions are modeled independently during the modeling process, only the individual motion characteristics of a fixed point can be obtained, and the coupled motion characteristics of the horizontal jump and pitch at the center of mass of the car body (that is, the position of the center of gravity) cannot be obtained

Therefore, in terms of the stiffness matching of the front and rear suspensions, the relationship between the front and rear stiffness distribution coefficients and the coupled motion of the car body cannot be established.

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