A method and device for analyzing the forward-looking geometric motion of a suspension

Abstract

The invention provides a method and device for analyzing forward-looking geometrical movement of a suspension. The method comprises the following steps: establishing a model of a double-wishbone independent suspension first side in a local coordinate system, inputting the rotation angle of an active arm, and outputting the location of each point and the wheel jump; converting the location of each point in the local coordinate system to a geodetic coordinate system to obtain a double-wishbone independent suspension model; receiving the input wheel jump, and calculating the rotation angle of the active arm and the location of each point of the double-wishbone independent suspension first side; and calculating the forward-looking geometrical performance parameter of the double-wishbone independent suspension model. According to the method provided by the invention, the double-wishbone suspension is simplified from a three-dimensional space to a two-dimensional plane for analysis, and the simplification meets the computational accuracy requirements of the general forward-looking geometrical performance parameter and can be applied to the early design and parameter optimization of this type of suspensions. By simplifying the double-wishbone independent suspension of automobiles, the forward-looking geometrical performance parameter of the suspension can be real-timely calculated in a wheel jump adjusting process, and the efficiency and quality of the geometrical arrangement of the suspension in the initial development stage can be improved.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a method and a device for analyzing the forward-looking geometric motion of a suspension. Background technique [0002] In the initial development process of vehicle model products, the geometric motion analysis of the suspension is an important theoretical basis for the design of the suspension system. This analysis establishes and solves the kinematic model of the suspension, and determines the geometric parameters of the suspension mechanism and their changing rules. This is also the basis for the geometric layout of the suspension and the analysis of the influence of the suspension system parameters on the vehicle performance. Due to the complexity of the automobile suspension structure, mathematical methods such as multi-body dynamics are generally used to analyze it. [0003] In the analysis of suspension geometric kinematics, it can be decomposed into two...

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Problems solved by technology

[0005] In order to overcome the technical problems in the prior art that the analysis process of the geometric kinematics of the suspension is relatively complicated and not suitable for practical engineering applications, the present invention provides a method and device for analyzing the geometric kinematics of the suspension in front view

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