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Date: Wed, 28 Oct 2009 08:11:16 -0400
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Subject: Re: How to design nonlinear PID controller? Please help!!
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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.