Thread Subject: Model Predictive Toolbox

Hello,


I tried to used the MPC toolbox in Simulink, but I had a problem with the D term (y=Ax+Du). I could not design a controller and a message said that there should not be a direct feed through (D should be zero) in the model.

Well, there is no possibility to get rid of the D matrix in my model, so does anyone have a clue how to solve this problem.

Thanks in advance

Eric

Please read this section of the documentation:
http://www.mathworks.com/access/helpdesk/help/toolbox/mpc/index.html?/access/helpdesk/help/toolbox/mpc/mpc_getstarted_models3.html&http://www.mathworks.com/access/helpdesk/help/toolbox/mpc/helptoc.html#13747

Basically, the recommendation is ti add a small delay at the inputs that have direct feedthorugh.

Hope this helps.

Arkadiy Turevskiy
The MathWorks

"TLM Dard" <drd_eric@yahoo.com> wrote in message <gpl6vd$g09$1@fred.mathworks.com>...
> Hello,
>
>
> I tried to used the MPC toolbox in Simulink, but I had a problem with the D term (y=Ax+Du). I could not design a controller and a message said that there should not be a direct feed through (D should be zero) in the model.
>
> Well, there is no possibility to get rid of the D matrix in my model, so does anyone have a clue how to solve this problem.
>
> Thanks in advance
>
> Eric

dear arkady, can you update the link,
i suppose it doesn't go to the exact page.


"Arkadiy Turevskiy" <arkadiy.turevskiy@mathworks.com> wrote in message <grlcpn$bd4$1@fred.mathworks.com>...
> Please read this section of the documentation:
> http://www.mathworks.com/access/helpdesk/help/toolbox/mpc/index.html?/access/helpdesk/help/toolbox/mpc/mpc_getstarted_models3.html&http://www.mathworks.com/access/helpdesk/help/toolbox/mpc/helptoc.html#13747
>
> Basically, the recommendation is ti add a small delay at the inputs that have direct feedthorugh.
>
> Hope this helps.
>
> Arkadiy Turevskiy
> The MathWorks

"ben harper" <controlusc@gmail.com> wrote in message
news:he9p0m$1cj$1@fred.mathworks.com...
> dear arkady, can you update the link,
> i suppose it doesn't go to the exact page.
>
>
> "Arkadiy Turevskiy" <arkadiy.turevskiy@mathworks.com> wrote in message
> <grlcpn$bd4$1@fred.mathworks.com>...
>> Please read this section of the documentation:
>> http://www.mathworks.com/access/helpdesk/help/toolbox/mpc/index.html?/access/helpdesk/help/toolbox/mpc/mpc_getstarted_models3.html&http://www.mathworks.com/access/helpdesk/help/toolbox/mpc/helptoc.html#13747
>>
>> Basically, the recommendation is ti add a small delay at the inputs that
>> have direct feedthorugh.
>>
>> Hope this helps.
>>
>> Arkadiy Turevskiy
>> The MathWorks
>
http://www.mathworks.com/access/helpdesk/help/toolbox/mpc/mpc_getstarted_models3.html#13747

Scroll down to the note just before the next heading (LTI Object
Properties).

Arnaud