Prev: Find controller gain from ramp response?
Next: Torque Measurement of speed driven pump
From: Rafa on 10 Feb 2010 04:12
hi, i'm newbie with simscape modeling and i have a doubt: when do i have to add a solver in a model? i have readden that i have to use it when there are two different topologies but i don't understand what means exactly with "different topologies"

regards ;)
From: Rafa on 10 Feb 2010 19:18
"Rafa" <l_black_flowers_l(a)hotmail.com> wrote in message <hktt92$piu$1(a)fred.mathworks.com>...
> hi, i'm newbie with simscape modeling and i have a doubt: when do i have to add a solver in a model? i have readden that i have to use it when there are two different topologies but i don't understand what means exactly with "different topologies"
>
> regards ;)


nobody knows anything about this?

thanks!
From: Arnaud Miege on 11 Feb 2010 08:57
"Rafa" <l_black_flowers_l(a)hotmail.com> wrote in message <hktt92$piu$1(a)fred.mathworks.com>...
> hi, i'm newbie with simscape modeling and i have a doubt: when do i have to add a solver in a model? i have readden that i have to use it when there are two different topologies but i don't understand what means exactly with "different topologies"
>
> regards ;)

Have a look at the documentation.:
"Each Simscape diagram (or each topologically distinct physical network in a diagram) must contain a Solver Configuration block from the Simscape Utilities library."

By topology, it is meant that you can have two completely different Simscape diagrams/networks in the same Simulink model that are not connected in any way. Those are topologically distinct.

HTH,

Arnaud
From: Rafa on 13 Feb 2010 09:55


> Have a look at the documentation.:
> "Each Simscape diagram (or each topologically distinct physical network in a diagram) must contain a Solver Configuration block from the Simscape Utilities library."
>
> By topology, it is meant that you can have two completely different Simscape diagrams/networks in the same Simulink model that are not connected in any way. Those are topologically distinct.



but, in the dc motor for example:
http://www.mathworks.co.uk/products/demos/simscape/model_dcmotor/index.html

which are the two different topologies?? we have a sover between dc-voltage and electrical reference, so the signal is electrical.
when we want to visualize a signal on a scope we have to use a converter to transform physical signal into simulink signal, but with the solver there is not a signal transformation.
From: Arnaud Miege on 16 Feb 2010 05:11
"Rafa" <l_black_flowers_l(a)hotmail.com> wrote in message <hl6egn$344$1(a)fred.mathworks.com>...

> but, in the dc motor for example:
> http://www.mathworks.co.uk/products/demos/simscape/model_dcmotor/index.html
>
> which are the two different topologies?? we have a sover between dc-voltage and electrical reference, so the signal is electrical.
> when we want to visualize a signal on a scope we have to use a converter to transform physical signal into simulink signal, but with the solver there is not a signal transformation.

There is no different topologies in the DC motor example, there is only one Simscape network and therefore one solver configuration block. The Simulink to Physical Signal converter and Physical Signal to Simulink converter blocks convert a simulink signal to a physical signal and vice-versa, they have nothing to do with the topology or solver configuration block.

You really need to read the documentation and understand the basics of modelling physical systems. Read at least the getting started section and the modeling physical systems sections of the documentation.

HTH,

Arnaud
 | 
Pages: 1
Prev: Find controller gain from ramp response?
Next: Torque Measurement of speed driven pump