Hybrid dead-beat observers for a class of nonlinear systems

Iasson Karafyllis, Zhong Ping Jiang

Research output: Contribution to journalArticlepeer-review


This paper studies both the full order and the reduced order dead-beat observer problem for a class of nonlinear systems, linear in the unmeasured states. A novel hybrid observer design strategy is proposed, with the help of the notion of strong observability in finite time. The proposed methodology is applied for the estimation of the frequency of a sinusoidal signal. The results show that accurate estimation can be provided even if the signal is corrupted by high frequency noise. A brief discussion of the robustness properties of the proposed observer with respect to measurement errors is also provided.

Original languageEnglish (US)
Pages (from-to)608-617
Number of pages10
JournalSystems and Control Letters
Issue number8
StatePublished - Aug 2011


  • Hybrid observers
  • Nonlinear systems
  • Observer design

ASJC Scopus subject areas

  • Control and Systems Engineering
  • General Computer Science
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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