Menu

Discussion Forum

New Discussion
Filtern

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Getting state-space matrices from acoustic model

Posted 18.08.2020, 11:03 GMT-4 Acoustics & Vibrations, LiveLink for MATLAB Version 5.3a 0 Replies

Thijs Hekman
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi all,

I am trying to obtain the state-space description for a simple acoustic model of a duct using the mphstate command in LiveLink with MATLAB. I would like to get the state-space model that describes the transfer function from a point source to a sensor (modelled as a point probe). I first tried it in a frequency domain model, but there I got a mass matrix filled with zeros and therefore state-space matrices filled with NaNs. I also tried a time-domain model, but I can't get a state-space description that makes any sense. I looked at the documentation, but I can't translate it to my model. I think my biggest problem is choosing the proper definition for my source.

Do any of you have experience with using mphstate on an acoustic model?

Thanks in advance,

Thijs

0 Replies Last Post 18.08.2020, 11:03 GMT-4
COMSOL Moderator

Hello Thijs Hekman

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content