A Multi-objective Optimization Method for Automobile Suspension System

A multi-objective optimization, automotive suspension technology, applied in the field of automotive structure optimization

Active Publication Date: 2016-09-21
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem that there is a certain contradiction between the two requirements on the suspension system parameters, a multi-objective optimization method for the vehicle suspension system considering the ride comfort and handling stability is proposed here.

Method used

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  • A Multi-objective Optimization Method for Automobile Suspension System
  • A Multi-objective Optimization Method for Automobile Suspension System
  • A Multi-objective Optimization Method for Automobile Suspension System

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Embodiment Construction

[0076] The present invention will be described in further detail below by examples in conjunction with the accompanying drawings.

[0077] established as figure 1 The vibration model of the vehicle suspension system shown, where m 1 、m 2 are the masses of the front and rear wheels respectively, m 5 is the body mass, I x , I y are the moments of inertia of the body around the horizontal and vertical axes, respectively, k 1 、k 2 are the vertical stiffness of the front and rear tires, k 5 、k 6 are the stiffnesses of the front and rear suspension springs respectively, c 5 、c 6 are the damping of front and rear suspension shock absorbers respectively, c 5 、c 6 are the damping of the front and rear suspension shock absorbers, respectively, q 1 ,q 2 ,q 3 ,q 4 are respectively the excitations of the road to the left front wheel, left rear wheel, right front wheel, and right rear wheel, z 1 ,z 2 ,z 3 ,z 4 is the displacement of the left front, left rear, right front ...

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Abstract

The invention relates to a multi-objective optimization design method of a suspension system for comprehensively realizing the car smoothness and the handling stability. For solving the problem of mutual contradiction between two objectives of the driving smoothness and the handling stability in the development and the design of the car suspension system, the multi-objective optimization model of the car suspension system is built. An optimal matching method of the rigidity of a suspension, the rigidity of a transverse stabilizing rod and damping parameters of the suspension based on a genetic algorithm is proposed; the minimum root-mean-square value of car body acceleration of a smoothness evaluation index and the minimum car body roll angle greatly influencing the handling stability are used as optimization objectives, and such performance indexes as the suspension offset frequency and understeering gain influencing the smoothness and the handling stability are used as restraints, so that the driving smoothness and the handling stability are largely improved, the whole performance of a car is obviously improved; and the car with the transverse stabilizing rod has the better stability and smoothness.

Description

technical field [0001] The invention belongs to the field of automobile structure optimization, and relates to a multi-objective optimization method of an automobile suspension system. Background technique [0002] The change of vehicle suspension parameters directly affects the ride comfort and handling stability of the vehicle. There is a contradictory relationship between the two performances. The increase in ride comfort will decrease the handling stability to a certain extent, and vice versa. The ride comfort of the car is mainly to keep the impact of the vibration and shock generated during driving on the comfort of the occupants within a certain limit, and to keep the cargo intact. Car handling stability means that the car can follow the direction given by the driver through the steering system and steering wheels under the condition that the driver does not feel excessive tension and fatigue, and when encountering external disturbances, the car can resist the disturb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60G17/015
Inventor 姜潮于盛赵旭光韩旭
Owner HUNAN UNIV
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