Thread Subject: simulink block problem with transfer function

hi,

I created in an m-file in MATLAB a variable e.g.
a = tf([4 1],[1 0])

Now I created an simulink model using an Transfer Function
Block and my problem is how do I assgin my variable a to the
simulink block?

My second question is how can I change the view on an
Transfer function block? I want the step response e. g. of
an integrator in the block and not the default Tranfer Function.

"Manfred Winner" <john.doe.nospam@mathworks.com> wrote in
message <fmcksi$fsd$1@fred.mathworks.com>...
> hi,
>
> I created in an m-file in MATLAB a variable e.g.
> a = tf([4 1],[1 0])
>
> Now I created an simulink model using an Transfer Function
> Block and my problem is how do I assgin my variable a to the
> simulink block?

Why don't you specify directly Numerator and Denominator
coefficients in the block Transfer Fcn?

However, If you like, it could be done like this

Numerator
    a.num{1}

Denominator
    a.den{1}

 
> My second question is how can I change the view on an
> Transfer function block? I want the step response e. g. of
> an integrator in the block and not the default Tranfer
Function.

Use image :: Mask Icon Drawing Commands (Simulink)

http://www.mathworks.com/access/helpdesk/help/toolbox/simulink/
slref/image.html

http://www.mathworks.com/access/helpdesk/help/toolbox/simulink/
ug/f8-3488.html

E.x:

image(imread(yourimage))

Note that: yourimage is an indexed image m x n x 3

Anh Huy Phan
RIKEN - BSI

Hi,

The "LTI System" block lets you enter the transfer function "a" directly,
see the "Control System Toolbox" library in the Simulink browser or type

>> cstblocks

-pascal

"Manfred Winner" <john.doe.nospam@mathworks.com> wrote in message
news:fmcksi$fsd$1@fred.mathworks.com...
> hi,
>
> I created in an m-file in MATLAB a variable e.g.
> a = tf([4 1],[1 0])
>
> Now I created an simulink model using an Transfer Function
> Block and my problem is how do I assgin my variable a to the
> simulink block?
>
> My second question is how can I change the view on an
> Transfer function block? I want the step response e. g. of
> an integrator in the block and not the default Tranfer Function.