The effect of time-delayed feedback controller on an electrically actuated resonator

S. Shao, K. M. Masri, M. I. Younis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


This paper presents a study of the effect of a time-delayed feedback controller on the dynamics of a Microelectromechanical systems (MEMS) capacitor actuated as a resonator by DC and AC voltage loads. A linearization analysis is conducted to determine the stability chart of the linearized system equations as a function of the time delay period and the controller gain. Then the method of multiple-scales is applied to determine the response and stability of the system for small vibration amplitude and voltage loads. It is shown that negative time-delay feedback control gain can lead to unstable responses, even if AC voltage is relatively small compared to the DC voltage. On the other hand, positive time delay can considerably strengthen the system stability even in fractal domains. We also show how the controller can be used to control damping in MEMS, increasing or decreasing, by tuning the gain amplitude and delay period. Agreements among the results of a shooting technique, long-time integration, basin of attraction analysis with the perturbation method are achieved.

Original languageEnglish (US)
Pages (from-to)257-270
Number of pages14
JournalNonlinear Dynamics
Issue number1-2
StatePublished - Oct 2013


  • Control
  • Delayed system
  • Electrostatic force
  • MEMS
  • Multiple scales

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Aerospace Engineering
  • Ocean Engineering
  • Mechanical Engineering
  • Applied Mathematics
  • Electrical and Electronic Engineering


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