System Identification
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From: Rico Cordova on 15 Dec 2009 16:54 I've recently acquired the System Identification toolbox and have a very specific problem I'd like to solve. I have the Step Response of an unknown system. I'd like to identify the Transfer Function using the System Identification toolbox. The only information I know about the system is that it's of the following form: k*omega_n^2/(1 + 2*zeta*omega_n + omega_n^2) The system is assumed to be LTI and continuous. Can anyone point me to documentation on how I can use the System Identification toolbox to solve this problem?
From: Bora Eryilmaz on 16 Dec 2009 08:44
See the section on identifying low-order transfer function models in the System Identification Toolbox documentation: http://www.mathworks.com/access/helpdesk/help/toolbox/ident/ug/bq5q4xh-1.html There is also a tutorial on this: http://www.mathworks.com/access/helpdesk/help/toolbox/ident/gs/bqx9b6n.html The model there is a bit different from yours, but essentially equivalent with K = k*omega_n^2 Hope this helps. Bora Eryilmaz "Rico Cordova" <bama.moss(a)gmail.com> wrote in message news:hg90hq$4qv$1(a)fred.mathworks.com... > I've recently acquired the System Identification toolbox and have a very > specific problem I'd like to solve. > > I have the Step Response of an unknown system. I'd like to identify the > Transfer Function using the System Identification toolbox. The only > information I know about the system is that it's of the following form: > > k*omega_n^2/(1 + 2*zeta*omega_n + omega_n^2) > > The system is assumed to be LTI and continuous. > > Can anyone point me to documentation on how I can use the System > Identification toolbox to solve this problem? |