A Novel Derivation Methodology for
Polynomial-LQ Controller Desing
IEEE Transactions on Automatic Control ,
vol 38, pp 116-121, January 1993. © 1993 IEEE.
Also: Internal Report UPTEC 90058R, Dept. of Technology,
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A simple derivation methodology for optimization
of linear quadratic controllers is
presented, in the discrete time polynomial systems framework.
A control law variation, regarded as a
potential feedforward from
the innovations, is used. Orthogonality is
evaluated in the frequency domain,
by collectively cancelling unstable poles by zeros.
The suggested method, summarized
as a three-step scheme,
is exemplified on a disturbance measurement feedforward and a
output feedback problem.
It is a simple and more direct alternative to
the ``completing the squares'' approach.
- Related publications:
with more discussion on feedforward design based on marginally
in IEEE Trans. SP 1991, where the corresponding method is applied
to filter design.
by K Öhrn, where the method is used for robust
LQ feedforward control.
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