Simscape fluids error cylinder area parametrization

32 次查看（过去 30 天）

Apostolos 2025-10-31，14:30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2180981-simscape-fluids-error-cylinder-area-parametrization

评论： Yifeng Tang 2025-11-5，18:14

Hello i am a university student and i am trying to build a hydraulic system for a crane miniature. My hydraulic system has the my defined values but i am getting the error:

Error:An error occurred during simulation and the simulation was terminated

Caused by:

['test_hydraulics/Solver Configuration1']: At time 0.498629, one or more assertions are triggered. See causes for specific information.

Liquid volume must be greater than minimum physical volume. The assertion comes from:

Block path: test_hydraulics/Double-Acting Actuator (IL)1

Assert location:

o In between line: 242, column: 5 and line: 242, column: 11 in file: foundation.isothermal_liquid.elements.translational_mechanical_converter

o In between line: 386, column: 17 and line: 395, column: 39 in file: fluids.isothermal_liquid.actuators.double_actuator

I dont know what to do i tried editing the parameters and i noticed that when i change my actuator area paramters from m^2 to cm^2 it works.

I have not used a relief valve.

Thanks in advance!

5 个评论
显示 3更早的评论隐藏 3更早的评论

Apostolos 2025-11-1，18:47

no i just change the unit

Yifeng Tang 2025-11-5，18:14

Most likely a parametrization error or it's the way you actuates the cylinder (e.g. prescribing a motion). The error message says the rod (R end) has moved in the negative direction (towards C) so much that it now beyond the minimum point, leading to an unphysical volume. This usually happens when the hydraulic pressure isn't building up to support the external load, or the external load is prescribed in an unphysical way, e.g. as a velocity sources. It's hard to tell without seeing the model.

请先登录，再进行评论。

请先登录，再回答此问题。