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Output regulation of periodic signals for DPS: an infinite-dimensional signal Generator

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2 Author(s)
Immonen, E. ; Tampere Univ. of Technol., Finland ; Pohjolainen, S.

In this note, we consider output regulation and disturbance rejection of periodic signals via state feedback in the setting of exponentially stabilizable linear infinite-dimensional systems. We show that if an infinite-dimensional exogenous system is generating periodic reference signals, solvability of the state feedback regulation problem is equivalent to solvability of the so called equations. This result allows us to consider asymptotic tracking of periodic reference signals which only have absolutely summable Fourier coefficients, while in related existing work the reference signals are confined to be infinitely smooth. We also discuss solution of the regulator equations and construct the actual feedback law to achieve output regulation in the single-input-single-output (SISO) case: The output regulation problem is solvable if the transfer function of the stabilized plant does not have zeros at the frequencies iωn of the periodic reference signals and if the sequence ([CR(iωn, A+BK)B]-1 ×(Qφn-CR(iωn, A+BK)Pφn)) n∈z∈ln2. A one-dimensional heat equation is used as an illustrative example.

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Automatic Control, IEEE Transactions on  (Volume:50 ,  Issue: 11 )