MATLAB Central Newsreader - How to design nonlinear PID controller? Please help!!

How to design nonlinear PID controller? Please help!!

Mary Md Ghazaly — Tue, 27 Oct 2009 05:05:19 -0400

Hi everyone..

I need some advice. How to design a nonlinear PID controller using simulink? If anyone already design this controller, please advice.

Thanks in advance.

Re: How to design nonlinear PID controller? Please help!!

Mary Anne — Tue, 27 Oct 2009 08:32:05 -0400

"Mary Md Ghazaly" <mariamghazaly@gmail.com> wrote in message <hc5v2f$1ej$1@fred.mathworks.com>...
> Hi everyone..
>
> I need some advice. How to design a nonlinear PID controller using simulink? If anyone already design this controller, please advice.
>
> Thanks in advance.

Please help!!

Re: How to design nonlinear PID controller? Please help!!

Mary Anne — Tue, 27 Oct 2009 08:33:03 -0400

Re: How to design nonlinear PID controller? Please help!!

Gavrilo Bozovic — Tue, 27 Oct 2009 08:39:04 -0400

"Mary Anne" <mariamghazaly@gmail.com> wrote in message <hc6b7v$p64$1@fred.mathworks.com>...
> "Mary Md Ghazaly" <mariamghazaly@gmail.com> wrote in message <hc5v2f$1ej$1@fred.mathworks.com>...
> > Hi everyone..
> >
> > I need some advice. How to design a nonlinear PID controller using simulink? If anyone already design this controller, please advice.
> >
> > Thanks in advance.
>
> Please help!!

http://en.wikipedia.org/wiki/PID_controller

you're welcome.

Re: How to design nonlinear PID controller? Please help!!

Mary Anne — Tue, 27 Oct 2009 11:30:26 -0400

"Gavrilo Bozovic" <gavrilo.dot.bozovic@gmail.dot.ch> wrote in message <hc6bj7$ji9$1@fred.mathworks.com>...
> "Mary Anne" <mariamghazaly@gmail.com> wrote in message <hc6b7v$p64$1@fred.mathworks.com>...
> > "Mary Md Ghazaly" <mariamghazaly@gmail.com> wrote in message <hc5v2f$1ej$1@fred.mathworks.com>...
> > > Hi everyone..
> > >
> > > I need some advice. How to design a nonlinear PID controller using simulink? If anyone already design this controller, please advice.
> > >
> > > Thanks in advance.
> >
> > Please help!!
>
> http://en.wikipedia.org/wiki/PID_controller
>
> you're welcome.

I already know how to design a PID controller. I want to know how to design a NONLINEAR PID controller.

Re: How to design nonlinear PID controller? Please help!!

Anony@Mous.com — Wed, 28 Oct 2009 12:11:16 -0400

Mary Anne wrote:
> "Gavrilo Bozovic" <gavrilo.dot.bozovic@gmail.dot.ch> wrote in message
> <hc6bj7$ji9$1@fred.mathworks.com>...
>> "Mary Anne" <mariamghazaly@gmail.com> wrote in message
>> <hc6b7v$p64$1@fred.mathworks.com>...
>>> "Mary Md Ghazaly" <mariamghazaly@gmail.com> wrote in message
>>> <hc5v2f$1ej$1@fred.mathworks.com>...
>>>> Hi everyone..
>>>>
>>>> I need some advice. How to design a nonlinear PID controller
>>>> using simulink? If anyone already design this controller,
>>>> please advice.
>>>>
>>>> Thanks in advance.
>>> Please help!!
>> http://en.wikipedia.org/wiki/PID_controller
>>
>> you're welcome.
>
> I already know how to design a PID controller. I want to know how to
> design a NONLINEAR PID controller.

So define what you mean by "NONLINEAR", gain scheduled, adaptive,
or with limit and integrator windup protection? You have to provide
sufficient information.

Re: How to design nonlinear PID controller? Please help!!

Mary Anne — Thu, 29 Oct 2009 02:15:05 -0400

Anony@Mous.com wrote in message <4ae834df$0$5095$9a6e19ea@unlimited.newshosting.com>...
> Mary Anne wrote:
> > "Gavrilo Bozovic" <gavrilo.dot.bozovic@gmail.dot.ch> wrote in message
> > <hc6bj7$ji9$1@fred.mathworks.com>...
> >> "Mary Anne" <mariamghazaly@gmail.com> wrote in message
> >> <hc6b7v$p64$1@fred.mathworks.com>...
> >>> "Mary Md Ghazaly" <mariamghazaly@gmail.com> wrote in message
> >>> <hc5v2f$1ej$1@fred.mathworks.com>...
> >>>> Hi everyone..
> >>>>
> >>>> I need some advice. How to design a nonlinear PID controller
> >>>> using simulink? If anyone already design this controller,
> >>>> please advice.
> >>>>
> >>>> Thanks in advance.
> >>> Please help!!
> >> http://en.wikipedia.org/wiki/PID_controller
> >>
> >> you're welcome.
> >
> > I already know how to design a PID controller. I want to know how to
> > design a NONLINEAR PID controller.
>
> So define what you mean by "NONLINEAR", gain scheduled, adaptive,
> or with limit and integrator windup protection? You have to provide
> sufficient information.

Thanks for your reply. Definition of Nonlinear in my case, is that my mechanism is a nonlinear actuator, where the force, F=kV^2 (which is nonlinear). I've already implemented an integrator windup in my original PID design. Here, I would like to know to linearize the system (i need to add a linearize unit in the system)?