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The control of the output fluid temperature in a distributed solar collector field implies accounting for the
excitement of its intrinsic resonance modes. Resonance mode frequencies are related to the residence time of
the fluid which flows through the distributed solar collector. At the same time, this physical variable is related to the
fluid velocity which is, in this kind of system, the control variable. Thus, the frequencies of the resonance modes
continuously change when controlling the output temperature. The addition of a repetitive compensation
controller into the control system has proved to be beneficial in terms of performance and resonance capabilities.
However, this kind of controller usually works with a fixed frequency, which prevents the total cancellation of the
system resonance dynamics. This article proposes an alternative structure of the repetitive controller which also
works with a fixed frequency, but is tuned taking into account the uncertainty in the resonance mode frequencies in
order to achieve fast, well-damped system responses.
CitationÁlvarez, J. [et al.]. A repetitive control scheme for distributed solar collector field. "International journal of control", Maig 2010, vol. 83, núm. 5, p. 970-982.
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