In the design of a State Space controller using state feedback the input to the plant is given as (where [itex]y=x[/itex] & [itex]D=0[/itex]): [tex]u=-Kx[/tex](adsbygoogle = window.adsbygoogle || []).push({});

If there is a "reference input" then it would be:

[tex]u=-Kx+r[/tex]

So the state feedback without the reference input simply drives all of the state variables to zero. When there is a reference input do the state variables get driven to match the values of the reference input?

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# Reference Input for State Space Controller

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