Firstly, a hydraulic model was carried out based on the structure of a certain hydro-pneumatic spring. Furthermore, with the distortion being involved, the dynamics model with the consideration of the distortion was built in Matlab/Simulink. Finally, the validity and accuracy of the model was evaluated through the comparison between the simulation output and the experiment data. The result shows this dynamics model has very high accuracy and could precisely express the characteristics of the hydro-pneumatic spring. It can also offer a reference and basis for the hydro-pneumatic spring analysis.
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