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Topic: OutputResponse issue
Replies: 2   Last Post: Dec 4, 2012 4:09 AM

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emammendes@gmail.com

Posts: 143
Registered: 8/22/05
Re: OutputResponse issue
Posted: Dec 4, 2012 4:09 AM
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Many thanks.

Ed

On Dec 3, 2012, at 6:55 PM, Bob Hanlon <hanlonr357@gmail.com> wrote:

> Recommend that the label for the second control be entered either as
>
> ToString[Subscript[T, s],TraditionalForm]
>
> or just
>
> Subscript[T, s]
>
>
> Bob Hanlon
>
>
> On Mon, Dec 3, 2012 at 1:29 PM, Eduardo M. A. M. Mendes
> <emammendes@gmail.com> wrote:

>> Dear Bob
>>
>> I have modified the functions you sent me and it seems that they work =

ok now. Would you mind testing them, please?
>>
>> =

ClearAll[respPlt1];respPlt1[tmax_,k_]:=OutputResponse[TransferFunctionMo=
del[k/(k+2 s+3 s^2+s^3),s],UnitStep[t],{t,0,tmax}]//FullSimplify;
>> Plot[Evaluate[Table[Tooltip[Evaluate@respPlt1[30,k],"k = =
"<>ToString[k]],{k,0.53 {1,2,3}}]],{t,0,30},PlotRange-> =
All,Frame->True,Axes->False,FrameLabel->(Style[#,Bold,14]&/@{"t","Output =
Response\n"})]
>>
>>
>> and
>>
>> ClearAll[respPlt2];
>> respPlt2[tmax_,k_]:=OutputResponse[TransferFunctionModel[k/(k+2 s+3 =

s^2+s^3),s],UnitStep[t],{t,0,tmax}]//FullSimplify
>> Manipulate[
>> =

Plot[Evaluate[respPlt2[tVal,k]],{t,0,tVal},Frame->True,Axes->False,PlotRan=
ge->{0,1.5},FrameLabel->(Style[#,Bold,14]&/@{"t","Output =
Response\n"})],{{k,0.53},.05,2.5,.01,Appearance->"Labeled"},{{tVal,30,"Sub=
script[T, s]"},5,100,1,Appearance->"Labeled"}]
>>
>>
>> The key point seems to be {t,0,tmax} on the function that uses =

OutputResponse.
>>
>> Many thanks
>>
>> Ed
>>
>>
>> On Dec 3, 2012, at 7:03 AM, Bob Hanlon <hanlonr357@gmail.com> wrote:
>>

>>> outResponse[k_: 0.53, t_] =
>>> OutputResponse[
>>> TransferFunctionModel[
>>> k/(k + 2 s + 3 s^2 + s^3), s],
>>> UnitStep[t], t] // FullSimplify;
>>>
>>> Plot[
>>> Evaluate[
>>> Table[
>>> Tooltip[
>>> outResponse[k, t],
>>> "k = " <> ToString[k]],
>>> {k, 0.53 {1, 2, 3}}]],
>>> {t, 0, 10},
>>> Frame -> True, Axes -> False,
>>> FrameLabel -> (Style[#, Bold, 14] & /@
>>> {"t",
>>> "Output Response\n"})]
>>>
>>> Manipulate[outResponse[k_, t_] =
>>> OutputResponse[
>>> TransferFunctionModel[
>>> k/(k + 2 s + 3 s^2 + s^3), s],
>>> UnitStep[t], t] // FullSimplify;
>>> Plot[
>>> Chop[outResponse[k, t]],
>>> {t, 0, 10},
>>> Frame -> True, Axes -> False,
>>> PlotRange -> {0, 1.5},
>>> FrameLabel -> (Style[#, Bold, 14] & /@
>>> {"t",
>>> "Output Response\n"})],
>>> {{k, 0.53}, .05, 2.5, .01,
>>> Appearance -> "Labeled"}]
>>>
>>>
>>> Bob Hanlon
>>>
>>>
>>> On Sun, Dec 2, 2012 at 4:58 AM, Eduardo M. A. M. Mendes
>>> <emammendes@gmail.com> wrote:

>>>>
>>>> Hello
>>>>
>>>> Can anyone help me with the following issue?
>>>>
>>>> Plot[Chop@OutputResponse[TransferFunctionModel[0.53/(0.53+2 s+3 s =

s+s s s),s],UnitStep[t],t],{t,0,10}]
>>>>
>>>> which returns
>>>>
>>>> OutputResponse::nsymb : "0.0002042857142857143` must be a symbol. =

\
>>>> =91=99=98ButtonBox["",
>>>> Appearance->{Automatic, None},
>>>> BaseStyle->"Link",
>>>> ButtonData:>"paclet:ref/OutputResponse",
>>>> ButtonNote->"OutputResponse::nsymb"]"
>>>>
>>>> and several other msgs.
>>>>
>>>> I have tried a different approach
>>>>
>>>> restfmf[t_,k_]:=OutputResponse[TransferFunctionModel[(k 1.06)/(k =

1.06+2 s+3 s s+s s s),s],UnitStep[t],t];
>>>>
>>>> Plot[Chop@Evaluate@restfmf[t, 0.5], {t, 0, 10}]
>>>>
>>>> but got the same error messages
>>>>
>>>> What am I missing here?
>>>>
>>>> Many thanks
>>>>
>>>> Ed
>>>>
>>>>
>>>>

>>>
>>





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