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Method for designing optimal damping coefficient of transverse damper of truck front-wheel shimmying system

A technology for lateral shock absorbers and front wheels of trucks, which is applied in the fields of instrumentation, calculation, electrical digital data processing, etc., can solve the problems that it is difficult for shock absorber engineering designers to master, the analysis and calculation are complex, and they cannot be satisfied.

Inactive Publication Date: 2015-12-23
SHANDONG UNIV OF TECH
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Problems solved by technology

However, since the front wheel shimmy system of trucks is a multi-degree-of-freedom vibration system, the dynamic analysis and calculation of it is very complicated. According to the information obtained, the current domestic and foreign research on the damping coefficient of the lateral shock absorber of the front wheel shimmy system of trucks Design, has not been able to give a reliable analytical design method, most of them are designed by experiment, Matlab / Simulink modeling simulation or Adams multi-body dynamics software modeling and simulation method, although this method can get relatively reliable simulation value, so that the vehicle has better dynamic performance. However, since this method requires computer modeling, optimization design and calculation, it is difficult for shock absorber engineering designers to master. In addition, this method cannot provide accurate analytical calculation formulas. Analytical design cannot be realized, and it cannot meet the requirements of CAD software development for the lateral shock absorber of the truck front wheel shimmy system

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  • Method for designing optimal damping coefficient of transverse damper of truck front-wheel shimmying system
  • Method for designing optimal damping coefficient of transverse damper of truck front-wheel shimmying system
  • Method for designing optimal damping coefficient of transverse damper of truck front-wheel shimmying system

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Embodiment Construction

[0042] specific implementation plan

[0043] The present invention will be further described in detail through an embodiment below.

[0044] Equivalent angular stiffness K of the steering tie rod of a truck 1 =49.1kN.m / rad, the equivalent angular stiffness K of the steering column of the front wheel steering system 3 =30.41kN.m / rad; Steering tie rod equivalent angular damping C 1 =30N.m.s / rad, steering column equivalent angular damping C 3 =70N.m.s / rad; Suspension system vertical stiffness K 2 =6.06kN.s / m, shock absorber equivalent damping coefficient C 2 =1.72kN.s / m; tire vertical stiffness K t = 850kN / m, lateral stiffness ρ = 190kN / m, cornering stiffness k = 94kN.m / rad, mechanical drag moment β = 0.06m; moment of inertia of left and right front wheels around kingpin I = 20kg.m 2 , the moment of inertia I of the wheel around its own axis w =12.96kg.m 2 , the moment of inertia of the front axle around the roll axis J=31.88kg.m 2 ;The arm length d of the steering knuck...

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Abstract

The invention relates to a method for designing the optimal damping coefficient of a transverse damper of a truck front-wheel shimmying system, and belongs to the technical field of truck front-wheel shimmying systems. The method includes the steps that the minimum critical damping coefficient of the transverse damper is calculated through the Hurwitz stability criterion; the maximum critical damping coefficient of the transverse damper is calculated according to the relationship among tire in-situ steering resistance, damping force of the transverse damper and force of a hydraulic power steering gear; then the optimal damping coefficient of the transverse damper is designed through the golden section principle. Through a design example and Matlab / Simulink simulation verification, it can be known that an accurate and reliable optimal damping coefficient design value of a transverse damper can be obtained, and a reliable design method is provided for designing the optimal damping coefficient of the transverse damper of the truck front-wheel shimmying system. By means of the method, the design level of the truck transverse damper and truck driving safety can be improved, design cost and experiment cost can be further reduced, and the product development period can be shortened.

Description

technical field [0001] The invention relates to a truck front wheel shimmy system, in particular to a method for designing the optimum damping coefficient of a lateral shock absorber of the truck front wheel shimmy system. Background technique [0002] The lateral shock absorber can effectively suppress the shimmy movement of the front wheels when the truck is running at high speed, and significantly improve the ride comfort, safety and handling stability of the vehicle. However, since the front wheel shimmy system of trucks is a multi-degree-of-freedom vibration system, the dynamic analysis and calculation of it is very complicated. According to the information obtained, the current domestic and foreign research on the damping coefficient of the lateral shock absorber of the front wheel shimmy system of trucks Design, has not been able to give a reliable analytical design method, most of them are designed by experiment, Matlab / Simulink modeling simulation or Adams multi-bod...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 周长城提艳赵雷雷于曰伟
Owner SHANDONG UNIV OF TECH
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