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total energy and loss in piezo model

Posted Dec 30, 2011, 1:50 p.m. EST MEMS & Nanotechnology, MEMS & Piezoelectric Devices Version 4.2 2 Replies

Kamala McNaul
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Hello,

I'm trying to determine the quality factor in a MEMS piezo resonator. But, I'm having difficulty calculating the total energy and loss. The piezo interface comes with W_tot and Q_h,tot already defined as pzd.W_int and pzd.Qh_int, respectively. But COMSOL tells me these are unknown variables. How else can I define the total energy and loss? I haven't been able to hit on the right way to do it.

Thanks so much.
Kamala
2 Replies Last Post Dec 13, 2012, 6:38 a.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Dec 31, 2011, 6:14 a.m. EST
Hi

have you chekecd the FORUM, this has been discussed several times, and I believe its also treated in the model library, in at least one of the models

--
Good luck
Ivar
Hi have you chekecd the FORUM, this has been discussed several times, and I believe its also treated in the model library, in at least one of the models -- Good luck Ivar
Ji Liang
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Posted: 1 decade ago Dec 13, 2012, 6:38 a.m. EST
I'm new to comsol and I met the same problems as you.Have you already solved it?Could you please help me?
I'm new to comsol and I met the same problems as you.Have you already solved it?Could you please help me?

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