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state space with matlab

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Good Morning!

I want to get out the state space form of a thin plate with matlab interface... If I type:

sp1 = model.sol('sol1').feature.create('sp1','StateSpace');

sp1.set('A','on');

I´ll get the error message:

Messages:
Unknown property
- Property: A

I can just extract MA,MB,C,D but no MC,A,B matrix?

And why is MB always zero, altough there is an excitation?

Does anyone know hot to fix this problem?

Thanks!

1 Reply Last Post 2010年11月3日 GMT-4 10:20

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Posted: 1 decade ago 2010年11月3日 GMT-4 10:20
There is following proplem with the documentation:

In the User´s Guide of Matlab Interface there were several choices to define mphstate: MA,MB,A,B,C,D,Mc,Null,ud,x0.

If on look in the local html help, there is a different description?!

You can find the local htmal help somewhere here:

file:///C:/COMSOL40a/doc/html/wwhelp

maybe a hint for some who are dealing with state-space

bye...
There is following proplem with the documentation: In the User´s Guide of Matlab Interface there were several choices to define mphstate: MA,MB,A,B,C,D,Mc,Null,ud,x0. If on look in the local html help, there is a different description?! You can find the local htmal help somewhere here: file:///C:/COMSOL40a/doc/html/wwhelp maybe a hint for some who are dealing with state-space bye...

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