@Article{fdmp.2026.087367,
AUTHOR = {Yihan Chao, Xiangping Liao, Tianhao Zhang, Zichen Wang, Feng Shao},
TITLE = {Influence of Valve-Orifice Geometry on Dynamic Response and Synchronization of Master–Slave Hydraulic Cylinders},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {},
YEAR = {},
NUMBER = {},
PAGES = {{pages}},
URL = {http://www.techscience.com/fdmp/online/detail/28459},
ISSN = {1555-2578},
ABSTRACT = {This study investigates the influence of valve-orifice geometry on the dynamic response and synchronization performance of master-slave hydraulic cylinder systems, with particular emphasis on transient fluid-structure interactions in electrically driven hydraulic systems. A combined theoretical and experimental investigation is conducted to elucidate the interaction between orifice geometry and the transient response of the master-slave system. A dynamic coupling model is developed that incorporates the geometry-dependent area gradient (dA/dx) and mechanical feedback delay, enabling the underlying mechanisms of pressure surges, post-surge time lag, and disturbance recovery during nonlinear throttling to be identified. Based on these mechanisms, adaptive composite valve design guidelines are proposed. The results show that the rectangular orifice provides the highest flow gain and the fastest response, with the active-cylinder spool flow reaching stabilization in 0.19 s, representing reductions of 9.1% and 14.8% compared with trapezoidal and U-shaped orifices, respectively. The corresponding follower-cylinder delay is only 0.03 s, 16.7% and 30.2% shorter than those of the trapezoidal and U-shaped orifices. In contrast, the trapezoidal throttle slot provides superior buffering performance, with a buffering time of 0.12 s, while also exhibiting a faster response to disturbances. The rectangular orifice, however, provides greater load stiffness.},
DOI = {10.32604/fdmp.2026.087367}
}