i need to model this pneumatic cycle using Simscape

1 view (last 30 days)
This model represents a real physical system in Automation Studio
-I am trying to model it using SimScape (to see the inflation and deflation times), but I have encountered two challenges.
In a real system, there are more elements that do not exist in SimScape fluid, for instance, a pressure regulator.
There are a number of parameters that are not included in the datasheet i have for DirectionalValve (G)
I made this model and when I run it, it shows the following error:
Thank you so much in advance

Answers (1)

Yifeng Tang
Yifeng Tang on 22 Dec 2022
The A-port of the two-way direction valve is connected to Pressure sensor, which allows no flow, so no flow can occur in this network. You will need a way to specify the boundary conditions in your model, like inlet & outlet temperature and pressure. The easiest way is to use the Reservoir (G) block. The absolute reference block you have now represents 0 Pa of pressure and 0 K of temperature. It's useful as a reference point for Pressure and Temperature sensors, but not good as boundary conditions. If the pressure source in your model is trying to get B port pressure higher than A, the reference block at the B end will then force the A port to have negative absolute pressure, and break all rules of thermodynamics :p


Find more on Gas Models in Help Center and File Exchange




Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by