| Citation: | CHEN Xiaoming, ZHU Yuchuan, WU Changwen, et al. Modeling and analysis of pressure wave propagation inside pipeline of digital switched hydraulic system[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(7): 1335-1344. doi: 10.13700/j.bh.1001-5965.2019.0478(in Chinese)
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In order to describe the characteristics of pressure wave propagation inside the pipeline in the digital switched hydraulic system accurately, an analytical model of pressure wave propagation inside the pipeline based on the transfer function and time delay was applied in this paper. By coupling the output flowrate characteristics of fast switching valve and pressure wave propagation analytical model, the model for pressure wave propagation characteristics inside pipeline in a hydraulic system controlled by two-position two-way fast switching valve was built and analyzed. The characteristics of pressure wave propagation inside pipeline under different parameters were discussed, and then validated in corresponding experiments. The results indicate that the experimental results are in good agreement with the results of the analytical model. The dynamic characteristics of the fast switching valve have a crucial impact on the pressure wave propagation effect inside the pipeline, which can be strongly affected by the pipeline properties. These will lay the foundation for further research of digital switched inertance hydraulic system.
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