The analysis of lateral stability for a three axis vehicle based on the graphical method

Liu Xi-xia,Yuan Lei, Liu Wei-ping

Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (4) : 98-103.

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PDF(2281 KB)
Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (4) : 98-103.

The analysis of lateral stability for a three axis vehicle based on the graphical method

  • Liu Xi-xia,Yuan Lei, Liu Wei-ping
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Abstract

The three axis vehicle has long body length、high axial load and complex driving condition, which makes the lateral stability of it be poor relatively. When the slip angle more than five degree, the tire will show nonlinear characteristics strongly. Considering that, the handling and stability of vehicle is analyzed in online and nonlinear domain. The vehicle model, online tire model and nonlinear tire model are built. In the online domain, based on the root locus method, the change of transient steering characteristics is analyzed resulted by the change of the structure and state parameters. In the nonlinear domain, based on the phase plane method, the relationship between the handling stability and driving conditions is analyzed. In the end, the control mechanism and handling stability of all-wheel steering vehicle are analyzed. It can provide theoretical support for the design and control of the three axis vehicle.

Key words

the three axis vehicle / lateral stability / root locus method / phase plane method

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Liu Xi-xia,Yuan Lei, Liu Wei-ping. The analysis of lateral stability for a three axis vehicle based on the graphical method[J]. Journal of Vibration and Shock, 2016, 35(4): 98-103

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