Study on damping characteristics of pneumatic damping adjustable coaxial and integrated strut

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (20) : 115-119.

LU Wen-chang，YANG Fan，WANG Shao-hua，SUN Xiao-qiang，CHEN Long

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Abstract

The design scheme of a type of suspension strut that damping characteristic can be controlled which consisting of an air spring, a PDC-valve and a three-tube hydraulic shock absorber was put forward to improve the adaptive ability of the shock absorber, its damping characteristic was related to the pressure of the air spring. The structure and basic working principle of the suspension strut was introduced. A mathematical model for the damping characteristic of the strut was established. And a model for the simulation of the strut was established by using software SIMULINK. The simulation results showed that the damping characteristic of the strut varies nonlinearly with the pressure of the air spring. The ride comfort of the vehicle was improved under empty load and light load conditions, and the dynamic performance of the vehicle was improved under heavy load conditions. Thus the adaptive ability was improved. The damping characteristic of the strut was tested under different pressure of the air spring conditions in the strut bench test. The test results showed good agreement with the simulation ones. It was showed that the mathematical model of the strut is correct and the design scheme of the strut is feasible.

Key words

strut / pressure-dependent damping characteristics / mathematical model / simulation / bench test

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LU Wen-chang，YANG Fan，WANG Shao-hua，SUN Xiao-qiang，CHEN Long. Study on damping characteristics of pneumatic damping adjustable coaxial and integrated strut[J]. Journal of Vibration and Shock, 2015, 34(20): 115-119

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