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Design method for real-time optimal control of nonlinear rigidity of vehicle air suspension

An air suspension, optimal control technology, applied in suspension, elastic suspension, vehicle components, etc., can solve the problem of not meeting the design requirements of vehicle ride comfort

Inactive Publication Date: 2015-01-28
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of the vehicle industry, the current design method of real-time optimal control of the nonlinear stiffness of the vehicle air suspension cannot meet the design requirements of vehicle development and ride comfort

Method used

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  • Design method for real-time optimal control of nonlinear rigidity of vehicle air suspension
  • Design method for real-time optimal control of nonlinear rigidity of vehicle air suspension
  • Design method for real-time optimal control of nonlinear rigidity of vehicle air suspension

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Experimental program
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Embodiment

[0049] Embodiment: the sprung mass m of certain vehicle single-wheel air suspension 2 =400kg, unsprung mass m 1 = 40kg, the natural height h of the air spring 0 =0.24m, shock absorber damping coefficient C d =2723N.s / m, shock absorber installation angle α=10°, leverage ratio i=0.9, tire stiffness K t =260000N / m, the vehicle is traveling at a speed of 80km / h on the expressway. The real-time optimal height control quantity of the vehicle's air suspension nonlinear stiffness is designed.

[0050] The design method for the real-time optimal control of the nonlinear stiffness of the vehicle air suspension provided by the embodiment of the present invention, the specific steps are as follows:

[0051] (1) Identification of nonlinear stiffness of air spring:

[0052] A: Use the vibration test equipment to measure and collect the vertical vibration acceleration signal of the axle and the vertical vibration acceleration signal of the vehicle body at the center of the installation ...

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Abstract

The invention relates to a design method for real-time optimal control of nonlinear rigidity of a vehicle air suspension and belongs to the technical field of vehicle air suspensions. The design method is characterized in that according to nonlinear rigidity feature of vehicle air springs and real-time optimal damping ratio of the suspension of a vehicle in a current running state, a relation between the real-time optimal rigidity of the vehicle air suspension and the height is acquired by analytical computation, and the optimal rigidity of the vehicle air suspension is controlled in real time by controlling the height of the air springs. The design method has the advantages that real-time optimal control of the nonlinear rigidity of the vehicle air suspension can be designed reliably and simply, design and test costs can be reduced, vehicle riding performance and riding comfort are improved.

Description

technical field [0001] The invention relates to a vehicle air suspension, in particular to a design method for the real-time optimal control of the nonlinear stiffness of the vehicle air suspension. Background technique [0002] The core component of the air suspension is the air spring, whose principle is to use the compressibility of the gas to realize the elastic effect, thereby improving the ride comfort and ride comfort of the vehicle. According to the information obtained, due to the restriction of the nonlinear elasticity of the air spring, the real-time optimal control of the nonlinear stiffness of the vehicle air suspension has not been given a simple and reliable design method at home and abroad. High degree of real-time control of the optimal stiffness of the air suspension. Most of them use methods such as filling and releasing gases of different pressures to the rubber airbags, adding additional air chambers, and adjusting the opening of the orifice to realize ...

Claims

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Application Information

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IPC IPC(8): B60G17/052
Inventor 周长城于曰伟赵雷雷
Owner SHANDONG UNIV OF TECH
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