Construction method of McPherson suspension multi-objective optimization function based on sensitivity analysis

A technology of multi-objective optimization and sensitivity analysis, applied in the field of multi-objective optimization function construction of McPherson suspension, can solve the problem of difficulty in ensuring the scientificity and rationality of optimization results, ignoring the front wheel alignment parameter returning torque, tire wear , can not accurately reflect the relative importance of positioning parameters and other issues

Active Publication Date: 2018-12-11
HEFEI UNIV OF TECH
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Problems solved by technology

However, the above-mentioned traditional method based on the principle of numerical statistics only performs a simple normalization process on each positioning parameter, without considering the influence of the front wheel positioning para

Method used

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  • Construction method of McPherson suspension multi-objective optimization function based on sensitivity analysis
  • Construction method of McPherson suspension multi-objective optimization function based on sensitivity analysis
  • Construction method of McPherson suspension multi-objective optimization function based on sensitivity analysis

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Embodiment Construction

[0090] see figure 1 , the multi-objective optimization function construction method of MacPherson suspension based on sensitivity analysis in this embodiment is carried out as follows:

[0091] Step 1, according to MacPherson suspension system data, establish the dynamic model of MacPherson suspension system;

[0092] Step 2. Carry out sensitivity analysis to the dynamic model, and then determine the design variable of multi-objective optimization, and the design variable is the hard point coordinate of the MacPherson suspension;

[0093] Step 3, according to the vehicle data, establish the vehicle simulation model in the multi-body dynamics simulation software ADAMS / Car;

[0094] Step 4. Carry out orthogonal test design on the positioning parameters of the front wheels respectively, and conduct a ride comfort test on the vehicle simulation model in the multi-body dynamics simulation software ADAMS / Car, and obtain the front wheels under high-speed and low-speed conditions res...

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Abstract

The invention discloses a construction method of a McPherson suspension multi-objective optimization function based on sensitivity analysis, the method being characterized by including: establishing mathematical models of front wheel alignment parameters, alignment torque and tire wear, quantifying the influence degree of front wheel alignment parameters on alignment torque and tire wear by usingsensitivity analysis method, and determining weight coefficients of Kingpin back inclination angle, Kingpin inclination angle, camber angle and toe angle under a high-speed working condition and a low-speed working condition; establishing a vehicle simulation model, and obtaining the simulation data through ride comfort test, and thus establishing the multi-objective optimization model of McPherson suspension hard point coordinates. The invention can effectively guarantee the objectivity and rationality of the weight coefficient in the McPherson suspension hard point coordinate multi-objectiveoptimization model, thereby improving the handling stability of the automobile and reducing the tire wear.

Description

technical field [0001] The invention relates to a method for constructing a multi-objective optimization function of a MacPherson suspension based on sensitivity analysis, and belongs to the technical field of geometric parameter optimization of a passive suspension system of an automobile. Background technique [0002] McPherson suspension is a passive suspension system widely used in small and medium-sized cars, and its kinematic characteristics have an important impact on vehicle handling stability. In the early development process of the MacPherson suspension system, the quality parameters of each part and the mechanical parameters of springs, bushes, shock absorbers, and tires are often determined first, and then the spatial position of the hard point of the suspension is arranged so that the wheels can move on the road. The change of positioning parameters during the excitation process is within an ideal range, reducing tire wear and rolling resistance, and improving t...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20
Inventor 石琴张飞陈一锴彭成旺
Owner HEFEI UNIV OF TECH
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