Non linear output to linear output

Hello,

Is it possible to convert non linear output to linear out put

I have system which is non linear system , its output is non linear and i want to feed this output to linear system. So is it possible to convert the non linear system output to linear and then feed to linear system ?

if it is possible then how to do that in matlab or simulink ?

[Shashank Prasanna]

Are you trying to linearize you non-linear model? "Convert nonlinear output to linear output" is not clear.

Please provide more information if you can.

[Aniket]

Hello,

I am working on adaptive oscillator which is made of nonlinear equations and which estimates the input signal frequency.

and i am using LQG control which is Linear made of Linear system ..i want to connect adaptive oscillator and controller but both have different properties ..

so i thought if oscillator system output can be convert to linear and then feed this linear output to LQG system ...is this possible ?

or any other way is there ?

thank you

Answer 1

[Shashank Prasanna]

It is still not clear what you mean by 'converting an output to linear'.

It seems you want to linearize your nonlinear oscillator, then you can use the following linearization tools:

http://www.mathworks.com/help/slcontrol/linearization-basics.html

However, you don't have to linearize your non-linear plant model in order to connect it to your LQG controller. Linear controllers can be used with nonlinear plant models but you mileage may vary.