Observer based nonuniform sampling predictive controller for a solar plant

R. N. Silva, L. M. Rato, J. M. Lemos

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


The work presented in this paper exploits the transport characteristic of a solar plant where the transport velocity (a flow) is the manipulated variable, i.e. the control input. The solar field is modelled by a partial differential equation. A non-uniform sampling in time is performed in order to obtain a discrete linear model. Due to the transport dynamics of the plant the resulting transfer function has a finite impulse response and the optimal control derived from a black-box approach of such a systems yield pure feed-forward compensators. The main contribution of this paper is the use of a state-space description of the plant in conjunction with the nonuniform sampling that allows to introduce the feedback mechanism through the state observer. The controller results from the optimization of a multi-step quadratic cost function. Experimental results performed with the solar plant are shown.

Original languageEnglish
Pages (from-to)233-238
Number of pages6
JournalIFAC Proceedings Volumes (IFAC-PapersOnline)
Issue number1
Publication statusPublished - 1 Jan 2002


  • Adaptive control
  • Predictive control
  • Solar energy
  • Time-scaling


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