connections in pneumatics

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Tomas Iesmantas 2011-4-12

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评论： Nikhil Chotai 2015-11-17

Hi,

I use Pneumatic library (Simscape Foundations) and I know that every node has to have connection to volume. For example if I use pneumatic resistive tube, then it have to be connected to pneumatic constant volume chamber. But it's not clear how to connect: whether to connect chamber before orifice or after? And if I have several tubes connected in parallel, do I have to connect one chamber (with volume equivalent to volumes of all tubes) or each tube has one separate chamber?

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Answer 1

Martin 2011-4-12

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Hi Tomas,

Good question. The key to this is that each node needs to have a connection to a volume, not each block. A node is the connection point of several blocks.

Let's say you have N tubes connected in parallel. They will all have a common node on one side, and another common node on the other side. Therefore, two volumes are necessary.

Likewise, N tubes connected in series will require N+1 volumes (N-1 between the tubes, and one on each end).

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Tomas Iesmantas 2011-4-13

Hi,

Thanks for your answer.

But another question is still unclear. How the volumes of chambers has to be choose? If I connect chambers on both sides of tube, then how should I calculate volumes of those chambers?

Nikhil Chotai 2015-11-17