Steady design method for vehicle steering trapezoid mechanism

Abstract

The invention relates to a steady design method for a vehicle steering trapezoid mechanism. The method comprises the following steps of: based on multi-body system dynamics theory, applying methods, such as a virtual model machine technology, multi-body dynamics, elasticity mechanics, steady design and the like, comprehensively considering a synergic relationship between a steering system and a suspension system, analyzing dynamics characteristics of the steering trapezoid mechanism under operating conditions, such as vehicle steering, vehicle wheel jumping and the like, and integrating uncertain factors impacting on a steering angle and a steering mechanism stress, such as a manufacturing error of a steering tie rod, a manufacturing error of a steering knuckle arm, an assembling error of a steering node, fit clearance between the steering mechanism and the suspension system, elastic deformation of the tie rod, and the like. An optimizing aim that corner error during the steering process is minimum, and a swing angle for a front wheel during vehicle jumping is minimum can be achieved, and a steady design model for the vehicle steering trapezoid mechanism is built. The steady design method has the advantages that: a design level of vehicle front wheel parameters can be improved, and the method can be widely applied to vehicle design with various types.

Description

Technical field: [0001] The invention relates to a robust design method for an automobile steering trapezoidal mechanism. Product technology includes multi-body dynamics, virtual prototype technology, optimal design, elastic mechanics, robust design and other technologies. Background technique: [0002] At present, the optimal design of the steering trapezoidal mechanism at home and abroad generally adopts the conventional deterministic optimal design method, without considering the influence of uncertain factors such as errors in the manufacturing process and assembly process of the steering mechanism. In addition, in the automobile steering trapezoidal mechanism, the kinematic pair needs a certain gap, and the gap increases due to wear, deformation and other reasons, resulting in an uncertain error in the steering angle of the steering mechanism. In the design of the steering trapezoidal mechanism, only the stress under the steering state of the vehicle is generally consi...

AI Technical Summary

Problems solved by technology

[0003] The problem that the present invention can solve is to overcome the deficiencies of the background technology, comprehensively consider the synergy of the steering system and the suspension system, combine the steering state of the vehicle and the two states of the wheel runout, and analyze assembly errors, manufacturing errors, fit clearances, and tie rods. Influenced by uncertain factors such as elastic deformation, a robust design method for automobile steering trapezoidal mechanism based on the integration of multiple uncertain information is established

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