Double acting hydraulic cylinder - Inertia of the piston?

Hi,

I have an hydraulic actuator model with a "Double acting hydraulic cylinder". Towards the end of the stroke the outlet passage on the rod side is restricted (fluid cushion), therefore I would like to see the effect of the piston inertia on the fluid pressure.

I have put a mass attached to the rod (in yellow in the picture), and tried to change the kg of this mass, however I don't see any effect on the fluid pressure at the end of the stroke. Does the model take into account this inertia force of the piston on the fluid?

[Yifeng Tang]

If the mass is traveling fast towards the hard-stop and cushion, the inertia should manifest itself in the fluid pressure. I suspect what you have is an parametrization issue. Is it possible to share the model and describe what you are trying to observe and the intended behavior?

[Amodio]

Hi Yfeng,

thanks for yuor reply, I will try to create a dummy model with the same issue and share it with you. Where can I put it for you?

[Yifeng Tang]

If you feel comfortable, you may post the model here using the attachment.

Otherwise, you may reach out to your MathWorks account rep or Tech Support and mention this post.