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Translational Multibody Interface cannot solve velocity

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Hi everyone,
I try to combine a multibody model with a hydraulic model. For this I used the Translational Multibody Interface block between the Double Acting Hydraulic Cylinder block and a prismatic Joint block with enabled velocity and force. But in this case the following error occurs:
An error occurred while running the simulation and the simulation was terminated
Caused by:
If the Translational Multibody Interface block and the Double Acting Hydraulic Cylinder block were replaced by Hydraulic Actuator Multibody block, the model seems to do something whenever not the things I want it to do, because the cylinder moves even when the valve is closed and doesn't change its motion if the valve setting changes.
I would be very happy to receive helpful answers and thank you in advance!
An overwhelmed Simscape apprentice

Respuesta aceptada

Steve Miller
Steve Miller el 20 de Nov. de 2021
The diagnostic indicates you are missing a reference node
Check for missing reference node.
The block you are likely missing is shown below.
--Steve
  4 comentarios
Steve Miller
Steve Miller el 25 de Nov. de 2021
Guesses:
  • Initial pressures are asymmetric
  • Gravity, a spring, or some other force in the mechanical system is forcing the cylinder to move (requires leakage area to be high enough).
  • Valve is not symmetrically parameterized (one side opens way more than the other - check units?)
--Steve
Benedikt Wanke
Benedikt Wanke el 25 de Nov. de 2021
Thank you!
I checked all of your points but in the end it worked after reducing the mass acting on the cylinder.

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