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Subject: Re: How to design nonlinear PID controller? Please help!!
Date: Thu, 29 Oct 2009 02:15:05 +0000 (UTC)
Organization: Tokyo Institute of Technology
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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)?